JP2024138784A - Optical image forming apparatus, control method for optical image forming apparatus, and program - Google Patents
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Abstract
Description
æ¬çºæã¯ãå ç»å圢æè£ çœ®ãå ç»å圢æè£ çœ®ã®å¶åŸ¡æ¹æ³ãåã³ãããã°ã©ã ã«é¢ããã The present invention relates to an optical image forming device, a control method for an optical image forming device, and a program.
å ç»åãååŸããããã®ææ³ã®ïŒã€ãšããŠãå ã³ããŒã¬ã³ã¹ãã¢ã°ã©ãã£ïŒïŒ¯ïœïœïœïœïœïœ ïœïœïœ ïœïœ ïœïœïœ ïœïœïœïœïœïœïœïœïœïŒïŒ¯ïŒ£ïŒŽïŒãç¥ãããŠãããã¯ãå ã®å¹²æžæ§ãå©çšããŠãµã³ãã«å éšãç»ååããæè¡ã§ãããå»çšã€ã¡ãŒãžã³ã°ãéç Žå£æ€æ»ãå«ãæ§ã ãªåéã«ãããŠå®çšåãããŠããã Optical coherence tomography (OCT) is known as one of the techniques for acquiring optical images. OCT is a technology that uses the coherence of light to image the inside of a sample, and has been put to practical use in a variety of fields, including medical imaging and non-destructive testing.
äžæ¹ãã¬ãŒã¶ãŒå ã§ãµã³ãã«ãïŒæ¬¡å çã«èµ°æ»ããããšã§ãµã³ãã«ã®æ£é¢ç»åãå ç»åãšããŠååŸããææ³ãç¥ãããŠããã On the other hand, a method is also known in which a front image of a sample is obtained as an optical image by scanning the sample two-dimensionally with laser light.
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For example,
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However, the technique disclosed in
æ¬çºæã¯ããã®ãããªäºæ ãéã¿ãŠãªããããã®ã§ããããã®ç®çã®ïŒã€ã¯ãè£ çœ®ã®å€§ååãæå°éã«æãã€ã€ãç»åãšïŒ³ïŒ¬ïŒ¯ç»åãšãååŸããããã®æ°ããªæè¡ãæäŸããããšã«ããã The present invention was made in consideration of these circumstances, and one of its objectives is to provide a new technology for acquiring OCT images and SLO images while minimizing the increase in size of the device.
ããã€ãã®å®æœåœ¢æ ã®ïŒã€ã®æ æ§ã¯ãå ã¹ãã£ããå«ã¿ãå æºããã®äœã³ããŒã¬ã³ã¹å ã枬å®å ãšåç §å ãšã«åå²ããåèšå ã¹ãã£ãã«ããååãããåèšæž¬å®å ã被枬å®ç©ã«ç §å°ããåç §å è·¯ãçµç±ããåèšåç §å ãšåèšè¢«æž¬å®ç©ããã®åèšæž¬å®å ã®æ»ãå ãšãå¹²æžãããå¹²æžå åŠç³»ãšãåèšåç §å è·¯ã«å¯ŸããŠæ¿è±å¯èœãªé®èœéšæãšãåèšåç §å è·¯ããåèšé®èœéšæãéé¿ãããç¶æ ã§åèšå¹²æžå åŠç³»ã«ããçæãããåèšåç §å ãšåèšæ»ãå ãšã®å¹²æžå ãåå ããåã¯ãåèšåç §å è·¯ã«åèšé®èœéšæãé 眮ãããç¶æ ã§åèšå¹²æžå åŠç³»ããåºåãããåèšæ»ãå ãåå ããåå éšæãšãåèšåå éšæã«ããåå ãããå ãåå ããã€ã¡ãŒãžã»ã³ãµãšãåèšã€ã¡ãŒãžã»ã³ãµã«ããåŸããããåèšå¹²æžå ãåå ããå ã®åå çµæã«åºã¥ããŠãåèšè¢«æž¬å®ç©ã®æå±€ç»åã圢æããæå±€ç»å圢æéšãšãåèšã€ã¡ãŒãžã»ã³ãµã«ããåŸããããåèšæ»ãå ãåå ããå ã®åå çµæã«åºã¥ããŠåèšè¢«æž¬å®ç©ã®æ£é¢ç»åã圢æããæ£é¢ç»å圢æéšãšããå«ããå ç»å圢æè£ çœ®ã§ããã One aspect of some embodiments is an optical image forming device including an optical scanner, an interference optical system that splits low-coherence light from a light source into measurement light and reference light, irradiates the measurement light deflected by the optical scanner onto a measured object, and causes the reference light that has passed through a reference optical path to interfere with the return light of the measurement light from the measured object; a shielding member that can be inserted into and removed from the reference optical path; a spectroscopic member that disperses the interference light between the reference light and the return light generated by the interference optical system when the shielding member is retracted from the reference optical path, or disperses the return light output from the interference optical system when the shielding member is disposed in the reference optical path; an image sensor that receives the light dispersed by the spectroscopic member; a tomographic image forming unit that forms a tomographic image of the measured object based on the light reception result of the light obtained by the image sensor that has been dispersed from the interference light; and a front image forming unit that forms a front image of the measured object based on the light reception result of the light obtained by the image sensor that has been dispersed from the return light.
ããã€ãã®å®æœåœ¢æ ã®å¥ã®æ æ§ã¯ãå ã¹ãã£ããå«ã¿ãå æºããã®äœã³ããŒã¬ã³ã¹å ã枬å®å ãšåç §å ãšã«åå²ããåèšå ã¹ãã£ãã«ããååãããåèšæž¬å®å ã被枬å®ç©ã«ç §å°ããåç §å è·¯ãçµç±ããåèšåç §å ãšåèšè¢«æž¬å®ç©ããã®åèšæž¬å®å ã®æ»ãå ãšãå¹²æžãããå¹²æžå åŠç³»ãšãåèšåç §å è·¯ã«å¯ŸããŠæ¿è±å¯èœãªé®èœéšæãšãåèšå¹²æžå åŠç³»ã«ããçæãããåèšæ»ãå ãšåèšåç §å ãšã®å¹²æžå ãåã¯ãåèšå¹²æžå åŠç³»ããåºåãããåèšæ»ãå ãåå ããåå éšæãšãåèšåå éšæã«ããåå ãããå ãåå ããã€ã¡ãŒãžã»ã³ãµãšããå«ããå ç»å圢æè£ çœ®ã®å¶åŸ¡æ¹æ³ã§ãããå ç»å圢æè£ çœ®ã®å¶åŸ¡æ¹æ³ã¯ãåèšåç §å è·¯ããåèšé®èœéšæãéé¿ããããšã«ããåèšå¹²æžå åŠç³»ã«åèšå¹²æžå ãçæããã第ïŒå¹²æžå åŠç³»å¶åŸ¡ã¹ããããšãåèšã€ã¡ãŒãžã»ã³ãµã«ããåèšå¹²æžå ãåå ããå ãåå ããããšã«ããåŸãããåå çµæã«åºã¥ããŠãåèšè¢«æž¬å®ç©ã®æå±€ç»åã圢æããæå±€ç»å圢æã¹ããããšãåèšåç §å è·¯ã«åèšé®èœéšæãæ¿å ¥ããããšã«ããåèšå¹²æžå åŠç³»ããåèšæ»ãå ãåºåããã第ïŒå¹²æžå åŠç³»å¶åŸ¡ã¹ããããšãåèšã€ã¡ãŒãžã»ã³ãµã«ããåèšæ»ãå ãåå ããå ãåå ããããšã«ããåŸãããåå çµæã«åºã¥ããŠãåèšè¢«æž¬å®ç©ã®æ£é¢ç»åã圢æããæ£é¢ç»å圢æã¹ããããšããå«ãã Another aspect of some embodiments is a method for controlling an optical imaging device, the method including an interference optical system including an optical scanner, which splits low-coherence light from a light source into measurement light and reference light, irradiates the measurement light deflected by the optical scanner onto an object to be measured, and causes interference between the reference light that has passed through a reference optical path and return light of the measurement light from the object to be measured, a shielding member that can be inserted into and removed from the reference optical path, a spectroscopic element that spectroscopically separates the interference light between the return light generated by the interference optical system and the reference light, or the return light output from the interference optical system, and an image sensor that receives the light dispersed by the spectroscopic element. The control method for the optical image forming device includes a first interference optical system control step of causing the interference optical system to generate the interference light by retracting the shielding member from the reference optical path, a tomographic image forming step of forming a tomographic image of the object to be measured based on the light reception result obtained by receiving the light obtained by splitting the interference light by the image sensor, a second interference optical system control step of causing the interference optical system to output the return light by inserting the shielding member into the reference optical path, and a front image forming step of forming a front image of the object to be measured based on the light reception result obtained by receiving the light obtained by splitting the return light by the image sensor.
ããã€ãã®å®æœåœ¢æ ã®æŽã«å¥ã®æ æ§ã¯ãã³ã³ãã¥ãŒã¿ã«ãäžèšã®å ç»å圢æè£ çœ®ã®å¶åŸ¡æ¹æ³ã®åã¹ããããå®è¡ãããããã°ã©ã ã§ããã Yet another aspect of some embodiments is a program that causes a computer to execute each step of the above-mentioned optical image forming device control method.
æ¬çºæã«ããã°ãè£ çœ®ã®å€§ååãæå°éã«æãã€ã€ãç»åãšïŒ³ïŒ¬ïŒ¯ç»åãšãååŸããããã®æ°ããªæè¡ãæäŸããããšãã§ããã The present invention provides a new technology for acquiring OCT images and SLO images while minimizing the increase in size of the device.
ãã®çºæã«ä¿ãå ç»å圢æè£ çœ®ãå ç»å圢æè£ çœ®ã®å¶åŸ¡æ¹æ³ãåã³ãããã°ã©ã ã®å®æœåœ¢æ ã®äžäŸã«ã€ããŠãå³é¢ãåç §ããªãã詳现ã«èª¬æããããªããå®æœåœ¢æ ã«ãããŠããã®æ现æžã«ãããŠåŒçšãããŠããæç®ã«èšèŒãããæè¡ãä»»æã«æŽçšããããšãå¯èœã§ããã An example of an embodiment of the optical image forming device, the control method for the optical image forming device, and the program according to the present invention will be described in detail with reference to the drawings. Note that in the embodiment, it is possible to arbitrarily use the techniques described in the documents cited in this specification.
å®æœåœ¢æ ã«ä¿ãå ç»å圢æè£ çœ®ã¯ãå¹²æžå åŠç³»ãšãé®èœéšæãšãåå éšæãšãã€ã¡ãŒãžã»ã³ãµãšãæå±€ç»å圢æéšãšãæ£é¢ç»å圢æéšãšãå«ããå¹²æžå åŠç³»ã¯ãå ã¹ãã£ããå«ã¿ãå æºããã®äœã³ããŒã¬ã³ã¹å ã枬å®å ãšåç §å ãšã«åå²ããå ã¹ãã£ãã«ããååããã枬å®å ã被枬å®ç©ã«ç §å°ããåç §å è·¯ãçµç±ããåç §å ãšè¢«æž¬å®ç©ããã®æž¬å®å ã®æ»ãå ãšãå¹²æžããããé®èœéšæã¯ãåç §å è·¯ã«å¯ŸããŠæ¿è±å¯èœã§ãããåå éšæã¯ãåç §å è·¯ããé®èœéšæãéé¿ãããç¶æ ã§å¹²æžå åŠç³»ã«ããçæãããåç §å ãšæ»ãå ãšã®å¹²æžå ãåå ããåã¯ãåç §å è·¯ã«é®èœéšæãé 眮ãããç¶æ ã§å¹²æžå åŠç³»ããåºåãããæ»ãå ãåå ãããã€ã¡ãŒãžã»ã³ãµã¯ãåå éšæã«ããåå ãããå ïŒäžèšã®å¹²æžå åã¯æž¬å®å ã®æ»ãå ïŒãåå ãããæå±€ç»å圢æéšã¯ãã€ã¡ãŒãžã»ã³ãµã«ããåŸããããå¹²æžå ãåå ããå ã®åå çµæã«åºã¥ããŠã被枬å®ç©ã®æå±€ç»åïŒïŒ¯ïŒ£ïŒŽç»åïŒã圢æãããæ£é¢ç»å圢æéšã¯ãã€ã¡ãŒãžã»ã³ãµã«ããåŸããããæ»ãå ãåå ããå ã®åå çµæã«åºã¥ããŠè¢«æž¬å®ç©ã®æ£é¢ç»åïŒïŒ³ïŒ¬ïŒ¯ç»åïŒã圢æããã The optical image forming device according to the embodiment includes an interference optical system, a shielding member, a spectroscopic member, an image sensor, a tomographic image forming unit, and a front image forming unit. The interference optical system includes an optical scanner, divides low-coherence light from a light source into measurement light and reference light, irradiates the measurement light deflected by the optical scanner onto the object to be measured, and causes interference between the reference light passing through the reference optical path and the return light of the measurement light from the object to be measured. The shielding member is insertable and detachable from the reference optical path. The spectroscopic member disperses the interference light between the reference light and the return light generated by the interference optical system when the shielding member is retracted from the reference optical path, or disperses the return light output from the interference optical system when the shielding member is disposed in the reference optical path. The image sensor receives the light dispersed by the spectroscopic member (the above-mentioned interference light or the return light of the measurement light). The tomographic image forming unit forms a tomographic image (OCT image) of the object to be measured based on the light reception result of the light obtained by dispersing the interference light obtained by the image sensor. The front image forming unit forms a front image (SLO image) of the object to be measured based on the light reception results of the light obtained by the image sensor after splitting the return light.
ããã§ãå¹²æžå åŠç³»ã¯ãåç §å è·¯ã«å¯ŸããŠæ¿è±ãããé®èœéšæã«ãããåç §å ãšè¢«æž¬å®ç©ããã®æž¬å®å ã®æ»ãå ãšã®å¹²æžå ãåã¯è¢«æž¬å®ç©ããã®æž¬å®å ã®æ»ãå ãåºåããããã«æ§æããããå ·äœçã«ã¯ãåç §å è·¯ããé®èœéšæãéé¿ãããç¶æ ã§ã¯ãåç §å ãšè¢«æž¬å®ç©ããã®æž¬å®å ã®æ»ãå ãšãå¹²æžãããå¹²æžæ段ïŒäŸãã°ããã¡ã€ãã«ãã©ïŒã¯åç §å ãšæ»ãå ãšã®å¹²æžå ãåºåãããäžæ¹ãåç §å è·¯ã«é®èœéšæãé 眮ãããç¶æ ã§ã¯ãå¹²æžãããåç §å ã®å éããªããå¹²æžæ段ã¯åç §å ãšæ»ãå ãšãå¹²æžãããããšãªã枬å®å ã®æ»ãå ããã®ãŸãŸåºåãããããªãã¡ãå¹²æžå åŠç³»ã®åºåå ã¯ãå¹²æžå ãåã¯ã枬å®å ã®æ»ãå ã§ããã The interference optical system is configured to output interference light between the reference light and return light of the measurement light from the object to be measured, or return light of the measurement light from the object to be measured, by using a shielding member that is inserted into and removed from the reference light path. Specifically, when the shielding member is retracted from the reference light path, an interference means (e.g., a fiber coupler) that causes interference between the reference light and return light of the measurement light from the object to be measured outputs interference light between the reference light and the return light. On the other hand, when a shielding member is placed in the reference light path, there is no amount of reference light to interfere, and the interference means outputs the return light of the measurement light as is, without interfering with the reference light and the return light. In other words, the output light of the interference optical system is interference light or return light of the measurement light.
ããã«ãããé®èœéšæã®æ¿è±ã«ãããå åŠç³»ãšïŒ³ïŒ¬ïŒ¯å åŠç³»ãšã§å¹²æžå åŠç³»ã®å°ãªããšãäžéšãå ±çšããããšãã§ãããåŸã£ãŠãè£ çœ®ã®å€§ååãæå°éã«æãã€ã€ãæå±€ç»åãšæ£é¢ç»åãšãååŸããããã®å ç»å圢æè£ çœ®ãæäŸããããšãã§ããã This allows at least a portion of the interference optical system to be shared between the OCT optical system and the SLO optical system by inserting and removing the shielding member. Therefore, it is possible to provide an optical imaging device for acquiring tomographic images and frontal images while minimizing the increase in size of the device.
ããã€ãã®å®æœåœ¢æ ã§ã¯ãåå éšæã¯ãåææ Œåã§ãããã€ã¡ãŒãžã»ã³ãµã¯ãåææ Œåã«åœ¢æãããæ Œåãã¿ãŒã³ã®é åæ¹åã«å¯Ÿå¿ããæ¹åã«ïŒä»¥äžã®åå çŽ åãé åãããã©ã€ã³ã»ã³ãµã§ãããããã€ãã®å®æœåœ¢æ ã§ã¯ãæ£é¢ç»å圢æéšã¯ãïŒä»¥äžã®åå çŽ åã®ããããã«å¯Ÿå¿ããç»çŽ æ å ±ãåæ£é¢ç»åã®ç»çŽ ããšã«å²ãåœãŠãããšã§ãåå ç»åãšããŠïŒä»¥äžã®æ£é¢ç»åã圢æãããããã€ãã®å®æœåœ¢æ ã§ã¯ãæ£é¢ç»å圢æéšã¯ãïŒä»¥äžã®åå çŽ åã«ãããè€æ°ã®åå çµæã«å¯Ÿããããã³ã°ïŒïœïœïœïœïœïœïœïŒåŠççµæã«å¯Ÿå¿ããç»çŽ æ å ±ãåæ£é¢ç»åã®ç»çŽ ããšã«å²ãåœãŠãããšã§ãåå ç»åãšããŠïŒä»¥äžã®æ£é¢ç»åã圢æãããåå ç»åã«ã¯ããã€ããŒã¹ãã¯ãã«ç»åããã«ãã¹ãã¯ãã«ç»åãªã©ãããã In some embodiments, the spectroscopic member is a diffraction grating, and the image sensor is a line sensor in which two or more light receiving elements are arranged in a direction corresponding to the arrangement direction of the grating pattern formed on the diffraction grating. In some embodiments, the front image forming unit forms two or more front images as spectral images by assigning pixel information corresponding to each of the two or more light receiving elements to each pixel of each front image. In some embodiments, the front image forming unit forms two or more front images as spectral images by assigning pixel information corresponding to a binning process result for multiple light receiving results in the two or more light receiving elements to each pixel of each front image. Spectroscopic images include hyperspectral images and multispectral images.
ããã§ãããã³ã°åŠçã¯ããã¯ã»ã«ããã³ã°åŠçãåã¯ããŒã¿ããã³ã°åŠçã§ãã£ãŠããããã¯ã»ã«ããã³ã°åŠçã¯ãã€ã¡ãŒãžã»ã³ãµã®å éšã§ãïŒä»¥äžã®åå çŽ åã«ããåŸãããïŒä»¥äžã®æ€åºçµæãåæããåŠçã§ãããããŒã¿ããã³ã°åŠçã¯ãã€ã¡ãŒãžã»ã³ãµã®å€éšã§ãïŒä»¥äžã®åå çŽ åã«ããåŸãããïŒä»¥äžã®æ€åºçµæãåæããåŠçã§ããã Here, the binning process may be a pixel binning process or a data binning process. The pixel binning process is a process in which two or more detection results obtained by two or more light receiving elements are combined inside the image sensor. The data binning process is a process in which two or more detection results obtained by two or more light receiving elements are combined outside the image sensor.
ããã€ãã®å®æœåœ¢æ ã§ã¯ãæ£é¢ç»å圢æéšã¯ãïŒä»¥äžã®åå çŽ åã«ãããå šåå çµæã«å¯Ÿããããã³ã°åŠççµæã«å¯Ÿå¿ããç»çŽ æ å ±ãç»çŽ ããšã«å²ãåœãŠãããšã§åäžã®æ£é¢ç»åã圢æããã In some embodiments, the front image forming unit forms a single front image by assigning pixel information corresponding to the binning process results for all light receiving results from two or more light receiving elements to each pixel.
被枬å®ç©ã®äŸãšããŠãçŒãç®èãªã©ã®çäœçµç¹ãæ¯ãªã©ã®çµç¹ãéç Žå£æ€æ»ãéæ¥è§Šæ€æ»ã®æ€æ»å¯Ÿè±¡ç©ãåã¯ãé䟵襲枬å®ã®æž¬å®ç©ãªã©ããããæå±€ç»å圢æéšã¯ãæå±€ç»å以å€ã®ïŒ¯ïŒ£ïŒŽç»åïŒäŸãã°ãïŒã¹ãã£ã³ç»åããããžã§ã¯ã·ã§ã³ç»åãªã©ã®ïœ ïœïŒïœïœïœïœ ç»åïŒã圢æããããã«ããŠãããã Examples of objects to be measured include biological tissues such as eyes and skin, tissues such as teeth, objects to be inspected in non-destructive or non-contact inspection, or objects to be measured in non-invasive measurements. The tomographic image forming unit may form OCT images other than tomographic images (for example, en-face images such as C-scan images and projection images).
å®æœåœ¢æ ã«ä¿ãæ å ±åŠçè£ çœ®ã¯ãäžèšã®å ç»å圢æè£ çœ®ã®å¶åŸ¡æ¹æ³ããœãããŠã§ã¢åŠçã«ããå®çŸãããå®æœåœ¢æ ã«ä¿ãæ å ±åŠçæ¹æ³ã¯ãäžèšã®æ å ±åŠçè£ çœ®ã«ããå®è¡ãããïŒä»¥äžã®ã¹ããããå«ããå®æœåœ¢æ ã«ä¿ãããã°ã©ã ã¯ãå®æœåœ¢æ ã«ä¿ãå ç»å圢æè£ çœ®ã®å¶åŸ¡æ¹æ³ã®åã¹ããããã³ã³ãã¥ãŒã¿ïŒããã»ããµïŒã«å®è¡ããããå®æœåœ¢æ ã«ä¿ãèšé²åªäœã¯ãå®æœåœ¢æ ã«ä¿ãããã°ã©ã ãèšé²ïŒèšæ¶ïŒãããã³ã³ãã¥ãŒã¿èªã¿åãå¯èœãªéäžæçãªèšé²åªäœïŒèšæ¶åªäœïŒã§ããã The information processing device according to the embodiment realizes the above-mentioned method for controlling the optical image forming device by software processing. The information processing method according to the embodiment includes one or more steps executed by the above-mentioned information processing device. The program according to the embodiment causes a computer (processor) to execute each step of the method for controlling the optical image forming device according to the embodiment. The recording medium according to the embodiment is a computer-readable non-transitory recording medium (storage medium) on which the program according to the embodiment is recorded (stored).
æ¬æ现æžã«ãããŠãããã»ããµã¯ãäŸãã°ãïŒïŒ£ïœ ïœïœïœïœïœ ïœïœïœïœ ïœïœïœïœïœ ïœïœïœïŒãïŒïŒ§ïœïœïœïœïœïœïœ ïœïœïœïœ ïœïœïœïœïœ ïœïœïœïŒãïŒïŒ¡ïœïœïœïœïœïœïœïœïœïœ ïœïœ ïœïœïœïœïœ ïœïœïœ ïœïœïœïœïœ ïœ ïŒ£ïœïœïœïœïœïœïŒãããã°ã©ããã«è«çããã€ã¹ïŒäŸãã°ãïŒïŒ³ïœïœïœïœïœ ïœïœïœïœïœïœïœïœïœïœïœ ïœïœïœïœ ïŒ€ïœ ïœïœïœïœ ïŒãïŒïŒ£ïœïœïœïœïœ ïœ ïŒ°ïœïœïœïœïœïœïœïœïœïœïœ ïœïœïœïœ ïŒ€ïœ ïœïœïœïœ ïŒãïŒïŒŠïœïœ ïœïœ ïœïœïœïœïœïœïœïœïœïœïœ ïœïœïœ ïœïœïœïœïŒïŒçã®åè·¯ãå«ããããã»ããµã¯ãäŸãã°ãèšæ¶åè·¯åã¯èšæ¶è£ 眮ã«æ ŒçŽãããŠããããã°ã©ã ãèªã¿åºãå®è¡ããããšã§ãå®æœåœ¢æ ã«ä¿ãæ©èœãå®çŸãããèšæ¶åè·¯åã¯èšæ¶è£ 眮ãããã»ããµã«å«ãŸããŠããŠããããŸããèšæ¶åè·¯åã¯èšæ¶è£ 眮ãããã»ããµã®å€éšã«èšããããŠããŠããã In this specification, a processor includes circuits such as a CPU (Central Processing Unit), a GPU (Graphics Processing Unit), an ASIC (Application Specific Integrated Circuit), and a programmable logic device (e.g., an SPLD (Simple Programmable Logic Device), a CPLD (Complex Programmable Logic Device), and an FPGA (Field Programmable Gate Array)). The processor realizes the functions of the embodiment by, for example, reading and executing a program stored in a memory circuit or a storage device. A memory circuit or a storage device may be included in the processor. Additionally, the memory circuit or storage device may be provided outside the processor.
以äžã®å®æœåœ¢æ ã§ã¯ã被枬å®ç©ã¯çŒã§ãããå®æœåœ¢æ ã«ä¿ãå ç»å圢æè£ çœ®ã¯ãçŒã«å¯ŸããŠïŒ¯ïŒ£ïŒŽæ®åœ±ãšïŒ³ïŒ¬ïŒ¯æ®åœ±ãšå®è¡å¯èœãªçŒç§è£ 眮ã§ãããã®ãšãããããããªãããå®æœåœ¢æ ã«ä¿ãå ç»å圢æè£ çœ®ã¯ãçŒç§è£ 眮ã«éå®ããããã®ã§ã¯ãªãã In the following embodiment, the object to be measured is an eye, and the optical image forming device according to the embodiment is an ophthalmic device capable of performing OCT imaging and SLO imaging of the eye. However, the optical image forming device according to the embodiment is not limited to an ophthalmic device.
å®æœåœ¢æ ã«ä¿ãçŒç§è£ 眮ã¯ãæŽã«ãçŒåºã«ã¡ã©ãã¹ãªããã©ã³ãæ€çŒé¡ãæè¡çšé¡åŸ®é¡çã®ãã¡ã®ããããïŒã€ä»¥äžã®æ©èœãæããŠããŠããããå®æœåœ¢æ ã«ä¿ãçŒç§è£ 眮ã¯ãæŽã«ãçŒç§æž¬å®è£ 眮åã³çŒç§æ²»çè£ çœ®ã®ãã¡ã®ããããïŒã€ä»¥äžãå«ãã§ããŠããããçŒç§æž¬å®è£ 眮ã¯ãäŸãã°ãçŒå±ææ€æ»è£ 眮ãçŒå§èšãã¹ããã¥ã©ãŒãã€ã¯ãã¹ã³ãŒãããŠã§ãŒãããã³ãã¢ãã©ã€ã¶ãèŠéèšããã€ã¯ãããªã¡ãŒã¿çã®ãã¡ã®ããããïŒã€ä»¥äžã§ãããçŒç§æ²»çè£ çœ®ã¯ãäŸãã°ãã¬ãŒã¶ãŒæ²»çè£ çœ®ãæè¡è£ 眮ãæè¡çšé¡åŸ®é¡çã®ãã¡ã®ããããïŒã€ä»¥äžã§ããã The ophthalmic device according to the embodiment may further have one or more functions of a fundus camera, a slit lamp ophthalmoscope, a surgical microscope, etc. The ophthalmic device according to the embodiment may further include one or more of an ophthalmic measurement device and an ophthalmic treatment device. The ophthalmic measurement device is, for example, one or more of an eye refraction examination device, a tonometer, a specular microscope, a wavefront analyzer, a perimeter, a microperimeter, etc. The ophthalmic treatment device is, for example, one or more of a laser treatment device, a surgical device, a surgical microscope, etc.
以äžã®å®æœåœ¢æ ã§ã¯ãçŒç§è£ 眮ã¯ãæ®åœ±ãšïŒ³ïŒ¬ïŒ¯æ®åœ±ãšã§å ±çšãããå¹²æžå åŠç³»ãšãçŒåºã«ã¡ã©ãšãå«ãããã®ïŒ¯ïŒ£ïŒŽæ®åœ±ã¯ãã¹ãã¯ãã©ã«ãã¡ã€ã³ïŒ¯ïŒ£ïŒŽã«ããå®çŸãããã In the following embodiment, the ophthalmologic apparatus includes an interference optical system shared between OCT imaging and SLO imaging, and a fundus camera. This OCT imaging is achieved by spectral domain OCT.
以äžãïœæ¹åã¯ã察ç©ã¬ã³ãºã®å 軞æ¹åã«çŽäº€ããæ¹åïŒå·Šå³æ¹åãæ°Žå¹³æ¹åïŒã§ãããïœæ¹åã¯ã察ç©ã¬ã³ãºã®å 軞æ¹åã«çŽäº€ããæ¹åïŒäžäžæ¹åãåçŽæ¹åïŒã§ãããã®ãšãããïœæ¹åã¯ã察ç©ã¬ã³ãºã®å 軞æ¹åã§ãããã®ãšããã In the following, the x direction is the direction perpendicular to the optical axis direction of the objective lens (left-right direction, horizontal direction), the y direction is the direction perpendicular to the optical axis direction of the objective lens (up-down direction, vertical direction), and the z direction is the optical axis direction of the objective lens.
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The reference light LR generated by the
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The reference light LR converted into a parallel light beam by the
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In this embodiment, the shielding
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On the other hand, the measurement light LS generated by the
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When the shielding
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When the shielding
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That is, the return light of the measurement light LS from the test eye E or the interference light LC is emitted from the
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In this embodiment, the
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In this example, a case has been described in which the optical path
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[Control system]
3 and 4 show an example of the configuration of the control system (processing system) of the
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The
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(Control unit 210)
The
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(Main control unit 211)
The
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The control of the
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The control of the focusing
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é åïŒäœçœ®ã倧ããããµã€ãºïŒã®å¶åŸ¡ãæ®åçŽ åã«å¯Ÿããåå
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The control of the
å
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The control over the optical path
å
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The control of the
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Control over the optical
å
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5 is a schematic diagram for explaining a first operation example of the SLO
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Figure 6 is a schematic diagram for explaining a second operation example of the SLO
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Figure 7 is a schematic diagram for explaining a third operation example of the SLO
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In some embodiments, the
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In some embodiments, the
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In some embodiments, the
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In some embodiments, the
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(User Interface 240)
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The operation unit 242 is used to operate the
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The subject's eye E is an example of an "object to be measured" according to the embodiment. The optical system included in the optical
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FIGS. 10 and 11 show an example of the operation of the
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(S1: Set operation mode)
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(S2: Set scan conditions)
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(S4: Focus adjustment)
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In the case of manual focus, the subject operates the operation unit 242, and the
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(S5: OCT image acquisition mode?)
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When it is determined that the operating mode set in step S1 is an OCT image (step S5: Y), the operation of the
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In step S7, the measurement light LS deflected by the
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(S8: OCT image formation process)
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As described above, the OCT
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(S9: Place shielding member)
On the other hand, in step S5, when it is determined that the operating mode set in step S1 is not an OCT image (step S5: N), the
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(S10: Scan)
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In step S10, the measurement light LS deflected by the
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Next, the
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Following step S8 or step S11, the
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In some embodiments, the
以äžã§ãçŒç§è£ 眮ïŒã®åäœã¯çµäºã§ããïŒãšã³ãïŒã This completes the operation of the ophthalmic device 1 (end).
ã¹ãããïŒïŒã®åŠçã¯ãå³ïŒïŒã«ç€ºããããŒã«åŸã£ãŠå®è¡ããããå³ïŒïŒã§ã¯ãããããã決ãããããå³ïŒïœå³ïŒã®ããããã®æ æ§ã®æ£é¢ç»åã圢æããããã®ãšãã The process of step S11 is performed according to the flow shown in FIG. 11. In FIG. 11, a predetermined front image of one of the aspects shown in FIG. 5 to FIG. 9 is formed.
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(S21: Obtain detection data)
In step S<b>11 , first, the SLO
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(S22: Binning process?)
When the binning process is performed on the detection data acquired in step S21 (step S22: Y), the operation of the SLO
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(S23: Binning process)
When performing the binning process on the detection data acquired in step S21 (step S22: Y), the SLO
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Next, the SLO
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Next, the SLO
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When it is determined that detection data, etc., should be assigned to the pixels of the next image (step S25: Y), the operation of the SLO
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On the other hand, when it is determined that detection data, etc. will not be assigned to the pixels of the next image (step S25: N), the operation of the SLO
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Next, the SLO
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When it is determined that detection data, etc. should be assigned to the next pixel in the image (step S26: Y), the operation of the SLO
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An optical image forming apparatus, a control method for the optical image forming apparatus, and a program according to an embodiment will be described.
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A first aspect of some embodiments is an optical image forming device (ophthalmic device 1) including an interference optical system (optical system included in the optical
ãã®ãããªæ æ§ã«ããã°ãåç §å è·¯ã«å¯Ÿããé®èœéšæã®æ¿è±ã«ãããæå±€ç»åãååŸããããã®å åŠç³»ãšæ£é¢ç»åãååŸããããã®å åŠç³»ãšã§å¹²æžå åŠç³»ã®å°ãªããšãäžéšãå ±çšããããšãã§ããããã«ãªããåŸã£ãŠãè£ çœ®ã®å€§ååãæå°éã«æãã€ã€ãæå±€ç»åãšæ£é¢ç»åãšãååŸããããã®å ç»å圢æè£ çœ®ãæäŸããããšãã§ããã According to this aspect, by inserting and removing the shielding member with respect to the reference light path, at least a part of the interference optical system can be shared between the optical system for acquiring a tomographic image and the optical system for acquiring a front image. Therefore, it is possible to provide an optical image forming device for acquiring a tomographic image and a front image while minimizing the increase in size of the device.
ããã€ãã®å®æœåœ¢æ ã®ç¬¬ïŒæ æ§ã§ã¯ã第ïŒæ æ§ã«ãããŠãåå éšæã¯ãåææ ŒåïŒïŒïŒïŒïŒã§ãããã€ã¡ãŒãžã»ã³ãµã¯ãåææ Œåã«åœ¢æãããæ Œåãã¿ãŒã³ã®é åæ¹åã«å¯Ÿå¿ããæ¹åã«ïŒä»¥äžã®åå çŽ åãé åãããã©ã€ã³ã»ã³ãµã§ããã In a second aspect of some embodiments, in the first aspect, the dispersing element is a diffraction grating (113). The image sensor is a line sensor in which two or more light receiving elements are arranged in a direction corresponding to the arrangement direction of the grating pattern formed on the diffraction grating.
ãã®ãããªæ æ§ã«ããã°ãåææ Œåãšã©ã€ã³ã»ã³ãµãšãå«ãåå åšãçšããŠãè£ çœ®ã®å€§ååãæå°éã«æãã€ã€ãæå±€ç»åãšæ£é¢ç»åãšãååŸããããã®å ç»å圢æè£ çœ®ãæäŸããããšãã§ããã According to this aspect, it is possible to provide an optical imaging device that uses a spectrometer including a diffraction grating and a line sensor to obtain a tomographic image and a front image while minimizing the increase in size of the device.
ããã€ãã®å®æœåœ¢æ ã®ç¬¬ïŒæ æ§ã§ã¯ã第ïŒæ æ§ã«ãããŠãæå±€ç»å圢æéšã¯ãïŒä»¥äžã®åå çŽ åã«ãããïŒä»¥äžã®åå çµæã«åºã¥ããŠæå±€ç»åã圢æããæ£é¢ç»å圢æéšã¯ãåæ£é¢ç»åã®ç»çŽ ããšã«ïŒä»¥äžã®åå çµæã®ããããã«å¯Ÿå¿ããç»çŽ æ å ±ãå²ãåœãŠãããïŒä»¥äžã®æ£é¢ç»åã圢æããã In a third aspect of some embodiments, in the second aspect, the tomographic image forming unit forms a tomographic image based on two or more light receiving results from two or more light receiving elements, and the front image forming unit forms two or more front images in which pixel information corresponding to each of the two or more light receiving results is assigned to each pixel of each front image.
ãã®ãããªæ æ§ã«ããã°ãè£ çœ®ã®å€§ååãæå°éã«æãã€ã€ãæå±€ç»åãšãã€ããŒã¹ãã¯ãã«ç»åãšããŠã®ïŒä»¥äžã®æ£é¢ç»åãšãååŸããããã®å ç»å圢æè£ çœ®ãæäŸããããšãã§ããã According to this aspect, it is possible to provide an optical imaging device for acquiring a tomographic image and two or more front images as hyperspectral images while minimizing the increase in size of the device.
ããã€ãã®å®æœåœ¢æ ã®ç¬¬ïŒæ æ§ã§ã¯ã第ïŒæ æ§ã«ãããŠãæå±€ç»å圢æéšã¯ãïŒä»¥äžã®åå çŽ åã«ãããïŒä»¥äžã®åå çµæã«åºã¥ããŠæå±€ç»åã圢æããæ£é¢ç»å圢æéšã¯ãïŒä»¥äžã®åå çŽ åã«ãããè€æ°ã®åå çµæã«å¯Ÿããããã³ã°åŠççµæã«å¯Ÿå¿ããç»çŽ æ å ±ãåæ£é¢ç»åã®ç»çŽ ããšã«å²ãåœãŠãããšã§ïŒä»¥äžã®æ£é¢ç»åã圢æããã In a fourth aspect of some embodiments, in the second aspect, the tomographic image forming unit forms a tomographic image based on two or more light receiving results from two or more light receiving elements, and the front image forming unit forms two or more front images by assigning pixel information corresponding to the binning process results for the multiple light receiving results from the two or more light receiving elements to each pixel of each front image.
ãã®ãããªæ æ§ã«ããã°ãããã³ã°åŠçãè¡ãããšã§ãè£ çœ®ã®å€§ååãæå°éã«æãã€ã€ãæå±€ç»åãšåå ç»åãšããŠã®ïŒä»¥äžã®æ£é¢ç»åãšãååŸããããã®å ç»å圢æè£ çœ®ãæäŸããããšãã§ããã According to this aspect, by performing binning processing, it is possible to provide an optical image forming device that can obtain a tomographic image and two or more front images as spectroscopic images while minimizing the increase in size of the device.
ããã€ãã®å®æœåœ¢æ ã®ç¬¬ïŒæ æ§ã§ã¯ã第ïŒæ æ§ã«ãããŠãæ£é¢ç»å圢æéšã¯ãïŒä»¥äžã®åå çŽ åã«ãããå šåå çµæã«å¯Ÿããããã³ã°åŠççµæã«å¯Ÿå¿ããç»çŽ æ å ±ãç»çŽ ããšã«å²ãåœãŠãããšã§åäžã®æ£é¢ç»åã圢æããã In a fifth aspect of some embodiments, in the fourth aspect, the front image forming unit forms a single front image by assigning pixel information corresponding to the binning process result for all light receiving results from two or more light receiving elements to each pixel.
ãã®ãããªæ æ§ã«ããã°ãïŒä»¥äžã®åå çŽ åã«ãããå šåå çµæã«å¯ŸããŠããã³ã°åŠçãè¡ãããšã§ãè£ çœ®ã®å€§ååãæå°éã«æãã€ã€ãæå±€ç»åãšåäžã®æ£é¢ç»åãšãååŸããããã®å ç»å圢æè£ çœ®ãæäŸããããšãã§ããã According to this aspect, by performing binning processing on all light receiving results from two or more light receiving elements, it is possible to provide an optical imaging device for acquiring a tomographic image and a single front image while minimizing the increase in size of the device.
ããã€ãã®å®æœåœ¢æ ã®ç¬¬ïŒæ æ§ã§ã¯ã第ïŒæ æ§ã«ãããŠãæ£é¢ç»å圢æéšã¯ãïŒä»¥äžã®åå çŽ åãè€æ°ã®åå çŽ å矀ã«åå²ããè€æ°ã®åå çŽ å矀æ¯ã«åå çŽ åã®åå çµæã«å¯ŸããŠããã³ã°åŠçãè¡ããããã³ã°åŠççµæã«å¯Ÿå¿ããç»çŽ æ å ±ãç»çŽ ããšã«å²ãåœãŠãããšã§ãïŒä»¥äžã®åå ç»åãšããŠã®ïŒä»¥äžã®æ£é¢ç»åã圢æããã In a sixth aspect of some embodiments, in the fourth aspect, the front image forming unit divides two or more light receiving elements into a plurality of light receiving element groups, performs a binning process on the light receiving results of the light receiving elements for each of the plurality of light receiving element groups, and assigns pixel information corresponding to the binning process result to each pixel, thereby forming two or more front images as two or more spectral images.
ãã®ãããªæ æ§ã«ããã°ãè£ çœ®ã®å€§ååãæå°éã«æãã€ã€ãæå±€ç»åãšææã®æ³¢é·ç¯å²ã®åå ç»åãšããŠã®ïŒä»¥äžã®æ£é¢ç»åãšãååŸããããã®å ç»å圢æè£ çœ®ãæäŸããããšãã§ããã According to this aspect, it is possible to provide an optical imaging device that can obtain a tomographic image and two or more front images as spectroscopic images in a desired wavelength range while minimizing the increase in size of the device.
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A seventh aspect of some embodiments is a method for controlling an optical image forming device (ophthalmic device 1) including an interference optical system (optical system included in the optical
ãã®ãããªæ¹æ³ã«ããã°ãåç §å è·¯ã«å¯Ÿããé®èœéšæã®æ¿è±ã«ãããæå±€ç»åãååŸããããã®å åŠç³»ãšæ£é¢ç»åãååŸããããã®å åŠç³»ãšã§å¹²æžå åŠç³»ã®å°ãªããšãäžéšãå ±çšããããšãã§ããããã«ãªããåŸã£ãŠãè£ çœ®ã®å€§ååãæå°éã«æãã€ã€ãæå±€ç»åãšæ£é¢ç»åãšãååŸããããšãå¯èœã«ãªãã According to this method, by inserting and removing the shielding member with respect to the reference light path, it becomes possible to share at least a part of the interference optical system between the optical system for acquiring a tomographic image and the optical system for acquiring a front image. Therefore, it becomes possible to acquire a tomographic image and a front image while minimizing the increase in size of the device.
ããã€ãã®å®æœåœ¢æ ã®ç¬¬ïŒæ æ§ã§ã¯ã第ïŒæ æ§ã«ãããŠãåå éšæã¯ãåææ ŒåïŒïŒïŒïŒïŒã§ãããã€ã¡ãŒãžã»ã³ãµã¯ãåææ Œåã«åœ¢æãããæ Œåãã¿ãŒã³ã®é åæ¹åã«å¯Ÿå¿ããæ¹åã«ïŒä»¥äžã®åå çŽ åãé åãããã©ã€ã³ã»ã³ãµã§ããã In an eighth aspect of some embodiments, in the seventh aspect, the dispersing element is a diffraction grating (113). The image sensor is a line sensor in which two or more light receiving elements are arranged in a direction corresponding to the arrangement direction of the grating pattern formed on the diffraction grating.
ãã®ãããªæ¹æ³ã«ããã°ãåææ Œåãšã©ã€ã³ã»ã³ãµãšãå«ãåå åšãçšããŠãè£ çœ®ã®å€§ååãæå°éã«æãã€ã€ãæå±€ç»åãšæ£é¢ç»åãšãååŸããããšãå¯èœã«ãªãã This method makes it possible to obtain cross-sectional images and frontal images using a spectrometer that includes a diffraction grating and a line sensor while minimizing the increase in size of the device.
ããã€ãã®å®æœåœ¢æ ã®ç¬¬ïŒæ æ§ã§ã¯ã第ïŒæ æ§ã«ãããŠãæå±€ç»å圢æã¹ãããã¯ãïŒä»¥äžã®åå çŽ åã«ãããïŒä»¥äžã®åå çµæã«åºã¥ããŠæå±€ç»åã圢æããæ£é¢ç»å圢æã¹ãããã¯ãåæ£é¢ç»åã®ç»çŽ ããšã«ïŒä»¥äžã®åå çµæã®ããããã«å¯Ÿå¿ããç»çŽ æ å ±ãå²ãåœãŠãããïŒä»¥äžã®æ£é¢ç»åã圢æããã In a ninth aspect of some embodiments, in the eighth aspect, the tomographic image forming step forms a tomographic image based on two or more light receiving results from two or more light receiving elements, and the front image forming step forms two or more front images in which pixel information corresponding to each of the two or more light receiving results is assigned to each pixel of each front image.
ãã®ãããªæ¹æ³ã«ããã°ãè£ çœ®ã®å€§ååãæå°éã«æãã€ã€ãæå±€ç»åãšãã€ããŒã¹ãã¯ãã«ç»åãšããŠã®ïŒä»¥äžã®æ£é¢ç»åãšãååŸããããšãå¯èœã«ãªãã This method makes it possible to obtain a cross-sectional image and two or more front images as hyperspectral images while minimizing the increase in size of the device.
ããã€ãã®å®æœåœ¢æ ã®ç¬¬ïŒïŒæ æ§ã§ã¯ã第ïŒæ æ§ã«ãããŠãæå±€ç»å圢æã¹ãããã¯ãïŒä»¥äžã®åå çŽ åã«ãããïŒä»¥äžã®åå çµæã«åºã¥ããŠæå±€ç»åã圢æããæ£é¢ç»å圢æã¹ãããã¯ãïŒä»¥äžã®åå çŽ åã«ãããè€æ°ã®åå çµæã«å¯Ÿããããã³ã°åŠççµæã«å¯Ÿå¿ããç»çŽ æ å ±ãåæ£é¢ç»åã®ç»çŽ ããšã«å²ãåœãŠãããšã§ïŒä»¥äžã®æ£é¢ç»åã圢æããã In a tenth aspect of some embodiments, in the eighth aspect, the tomographic image forming step forms a tomographic image based on two or more light receiving results from two or more light receiving elements, and the front image forming step forms two or more front images by assigning pixel information corresponding to the binning process results for the multiple light receiving results from the two or more light receiving elements to each pixel of each front image.
ãã®ãããªæ¹æ³ã«ããã°ãããã³ã°åŠçãè¡ãããšã§ãè£ çœ®ã®å€§ååãæå°éã«æãã€ã€ãæå±€ç»åãšåå ç»åãšããŠã®ïŒä»¥äžã®æ£é¢ç»åãšãååŸããããšãå¯èœã«ãªãã According to this method, by performing binning processing, it is possible to obtain a cross-sectional image and two or more front images as spectroscopic images while minimizing the increase in size of the device.
ããã€ãã®å®æœåœ¢æ ã®ç¬¬ïŒïŒæ æ§ã§ã¯ã第ïŒïŒæ æ§ã«ãããŠãæ£é¢ç»å圢æã¹ãããã¯ãïŒä»¥äžã®åå çŽ åã«ãããå šåå çµæã«å¯Ÿããããã³ã°åŠççµæã«å¯Ÿå¿ããç»çŽ æ å ±ãç»çŽ ããšã«å²ãåœãŠãããšã§åäžã®æ£é¢ç»åã圢æããã In an eleventh aspect of some embodiments, in the tenth aspect, the front image forming step forms a single front image by assigning pixel information corresponding to the binning process result for all light receiving results in two or more light receiving elements to each pixel.
ãã®ãããªæ¹æ³ã«ããã°ãïŒä»¥äžã®åå çŽ åã«ãããå šåå çµæã«å¯ŸããŠããã³ã°åŠçãè¡ãããšã§ãè£ çœ®ã®å€§ååãæå°éã«æãã€ã€ãæå±€ç»åãšåäžã®æ£é¢ç»åãšãååŸããããšãå¯èœã«ãªãã According to this method, by performing a binning process on all light receiving results from two or more light receiving elements, it is possible to obtain a tomographic image and a single front image while minimizing the increase in size of the device.
ããã€ãã®å®æœåœ¢æ ã®ç¬¬ïŒïŒæ æ§ã§ã¯ã第ïŒæ æ§ã«ãããŠãæ£é¢ç»å圢æã¹ãããã¯ãïŒä»¥äžã®åå çŽ åãè€æ°ã®åå çŽ å矀ã«åå²ããè€æ°ã®åå çŽ å矀æ¯ã«åå çŽ åã®åå çµæã«å¯ŸããŠããã³ã°åŠçãè¡ããããã³ã°åŠççµæã«å¯Ÿå¿ããç»çŽ æ å ±ãç»çŽ ããšã«å²ãåœãŠãããšã§ãïŒä»¥äžã®åå ç»åãšããŠã®ïŒä»¥äžã®æ£é¢ç»åã圢æããã In a twelfth aspect of some embodiments, in the ninth aspect, the front image forming step divides two or more light receiving elements into a plurality of light receiving element groups, performs a binning process on the light receiving results of the light receiving elements for each of the plurality of light receiving element groups, and assigns pixel information corresponding to the binning process result to each pixel to form two or more front images as two or more spectral images.
ãã®ãããªæ¹æ³ã«ããã°ãè£ çœ®ã®å€§ååãæå°éã«æãã€ã€ãæå±€ç»åãšææã®æ³¢é·ç¯å²ã®åå ç»åãšããŠã®ïŒä»¥äžã®æ£é¢ç»åãšãååŸããããšãå¯èœã«ãªãã This method makes it possible to obtain a tomographic image and two or more front images as spectroscopic images in the desired wavelength range while minimizing the increase in size of the device.
ããã€ãã®å®æœåœ¢æ ã®ç¬¬ïŒïŒæ æ§ã¯ãã³ã³ãã¥ãŒã¿ã«ã第ïŒæ æ§ïœç¬¬ïŒïŒæ æ§ã®ããããã«èšèŒã®å ç»å圢æè£ çœ®ã®å¶åŸ¡æ¹æ³ã®åã¹ããããå®è¡ãããããã°ã©ã ã§ããã A thirteenth aspect of some embodiments is a program for causing a computer to execute each step of the method for controlling an optical imaging device described in any one of the seventh to twelfth aspects.
ãã®ãããªããã°ã©ã ã«ããã°ãåç §å è·¯ã«å¯Ÿããé®èœéšæã®æ¿è±ã«ãããæå±€ç»åãååŸããããã®å åŠç³»ãšæ£é¢ç»åãååŸããããã®å åŠç³»ãšã§å¹²æžå åŠç³»ã®å°ãªããšãäžéšãå ±çšããããšãã§ããããã«ãªããåŸã£ãŠãè£ çœ®ã®å€§ååãæå°éã«æãã€ã€ãæå±€ç»åãšæ£é¢ç»åãšãååŸããããã®å ç»å圢æè£ çœ®ãæäŸããããšãã§ããã According to such a program, by inserting and removing a shielding member with respect to the reference light path, it becomes possible to share at least a part of the interference optical system between the optical system for acquiring a tomographic image and the optical system for acquiring a front image. Therefore, it is possible to provide an optical image forming device for acquiring a tomographic image and a front image while minimizing the increase in size of the device.
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The embodiment described above is merely one example for carrying out the present invention. Anyone who wishes to carry out the present invention may make any modifications, omissions, additions, etc. within the scope of the gist of the present invention.
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Claims (13)
åèšåç §å è·¯ã«å¯ŸããŠæ¿è±å¯èœãªé®èœéšæãšã
åèšåç §å è·¯ããåèšé®èœéšæãéé¿ãããç¶æ ã§åèšå¹²æžå åŠç³»ã«ããçæãããåèšåç §å ãšåèšæ»ãå ãšã®å¹²æžå ãåå ããåã¯ãåèšåç §å è·¯ã«åèšé®èœéšæãé 眮ãããç¶æ ã§åèšå¹²æžå åŠç³»ããåºåãããåèšæ»ãå ãåå ããåå éšæãšã
åèšåå éšæã«ããåå ãããå ãåå ããã€ã¡ãŒãžã»ã³ãµãšã
åèšã€ã¡ãŒãžã»ã³ãµã«ããåŸããããåèšå¹²æžå ãåå ããå ã®åå çµæã«åºã¥ããŠãåèšè¢«æž¬å®ç©ã®æå±€ç»åã圢æããæå±€ç»å圢æéšãšã
åèšã€ã¡ãŒãžã»ã³ãµã«ããåŸããããåèšæ»ãå ãåå ããå ã®åå çµæã«åºã¥ããŠåèšè¢«æž¬å®ç©ã®æ£é¢ç»åã圢æããæ£é¢ç»å圢æéšãšã
ãå«ããå ç»å圢æè£ çœ®ã an interference optical system including an optical scanner, which splits low-coherence light from a light source into measurement light and reference light, irradiates the measurement light deflected by the optical scanner onto an object to be measured, and causes interference between the reference light passing through a reference optical path and return light of the measurement light from the object to be measured;
a shielding member that is insertable into and detachable from the reference light path;
a spectroscopic member that spectroscopically separates interference light between the reference light and the return light generated by the interference optical system in a state in which the shielding member is retracted from the reference light path, or that spectroscopically separates the return light output from the interference optical system in a state in which the shielding member is disposed in the reference light path;
an image sensor that receives the light dispersed by the dispersing member;
a tomographic image forming unit that forms a tomographic image of the object to be measured based on a light receiving result of the light obtained by the image sensor and separated from the interference light;
a front image forming unit that forms a front image of the object to be measured based on a light receiving result of the light obtained by the image sensor and splitting the return light;
1. An optical imaging device comprising:
åèšã€ã¡ãŒãžã»ã³ãµã¯ãåèšåææ Œåã«åœ¢æãããæ Œåãã¿ãŒã³ã®é åæ¹åã«å¯Ÿå¿ããæ¹åã«ïŒä»¥äžã®åå çŽ åãé åãããã©ã€ã³ã»ã³ãµã§ãã
ããšãç¹åŸŽãšããè«æ±é ïŒã«èšèŒã®å ç»å圢æè£ çœ®ã the spectroscopic member is a diffraction grating,
2. The optical imaging device according to claim 1, wherein the image sensor is a line sensor in which two or more light receiving elements are arranged in a direction corresponding to an arrangement direction of a grating pattern formed on the diffraction grating.
åèšæ£é¢ç»å圢æéšã¯ãåæ£é¢ç»åã®ç»çŽ æ¯ã«åèšïŒä»¥äžã®åå çµæã®ããããã«å¯Ÿå¿ããç»çŽ æ å ±ãå²ãåœãŠãããïŒä»¥äžã®åèšæ£é¢ç»åã圢æãã
ããšãç¹åŸŽãšããè«æ±é ïŒã«èšèŒã®å ç»å圢æè£ çœ®ã the tomographic image forming unit forms the tomographic image based on two or more light receiving results in the two or more light receiving elements;
The optical image forming device according to claim 2 , wherein the front image forming unit forms two or more of the front images, each of which is assigned pixel information corresponding to each of the two or more light receiving results for each pixel of the front image.
åèšæ£é¢ç»å圢æéšã¯ãåèšïŒä»¥äžã®åå çŽ åã«ãããè€æ°ã®åå çµæã«å¯Ÿããããã³ã°åŠççµæã«å¯Ÿå¿ããç»çŽ æ å ±ãåæ£é¢ç»åã®ç»çŽ æ¯ã«å²ãåœãŠãããšã§ïŒä»¥äžã®åèšæ£é¢ç»åã圢æãã
ããšãç¹åŸŽãšããè«æ±é ïŒã«èšèŒã®å ç»å圢æè£ çœ®ã the tomographic image forming unit forms the tomographic image based on two or more light receiving results in the two or more light receiving elements;
The optical image forming device according to claim 2, characterized in that the front image forming unit forms two or more of the front images by assigning pixel information corresponding to a binning processing result for a plurality of light receiving results at the two or more light receiving elements to each pixel of each front image.
ããšãç¹åŸŽãšããè«æ±é ïŒã«èšèŒã®å ç»å圢æè£ çœ®ã The optical image forming device according to claim 4 , wherein the front image forming section forms the single front image by assigning pixel information corresponding to a binning process result for all light receiving results in the two or more light receiving elements to each pixel.
ããšãç¹åŸŽãšããè«æ±é ïŒã«èšèŒã®å ç»å圢æè£ çœ®ã The optical image forming device according to claim 4, characterized in that the front image forming unit divides the two or more light receiving elements into a plurality of light receiving element groups, performs a binning process on the light receiving results of the light receiving elements for each of the plurality of light receiving element groups, and forms two or more of the front images as two or more spectral images by assigning pixel information corresponding to the binning process result to each pixel.
åèšåç §å è·¯ã«å¯ŸããŠæ¿è±å¯èœãªé®èœéšæãšã
åèšå¹²æžå åŠç³»ã«ããçæãããåèšæ»ãå ãšåèšåç §å ãšã®å¹²æžå ãåã¯ãåèšå¹²æžå åŠç³»ããåºåãããåèšæ»ãå ãåå ããåå éšæãšã
åèšåå éšæã«ããåå ãããå ãåå ããã€ã¡ãŒãžã»ã³ãµãšã
ãå«ããå ç»å圢æè£ çœ®ã®å¶åŸ¡æ¹æ³ã§ãã£ãŠã
åèšåç §å è·¯ããåèšé®èœéšæãéé¿ããããšã«ããåèšå¹²æžå åŠç³»ã«åèšå¹²æžå ãçæããã第ïŒå¹²æžå åŠç³»å¶åŸ¡ã¹ããããšã
åèšã€ã¡ãŒãžã»ã³ãµã«ããåèšå¹²æžå ãåå ããå ãåå ããããšã«ããåŸãããåå çµæã«åºã¥ããŠãåèšè¢«æž¬å®ç©ã®æå±€ç»åã圢æããæå±€ç»å圢æã¹ããããšã
åèšåç §å è·¯ã«åèšé®èœéšæãæ¿å ¥ããããšã«ããåèšå¹²æžå åŠç³»ããåèšæ»ãå ãåºåããã第ïŒå¹²æžå åŠç³»å¶åŸ¡ã¹ããããšã
åèšã€ã¡ãŒãžã»ã³ãµã«ããåèšæ»ãå ãåå ããå ãåå ããããšã«ããåŸãããåå çµæã«åºã¥ããŠãåèšè¢«æž¬å®ç©ã®æ£é¢ç»åã圢æããæ£é¢ç»å圢æã¹ããããšã
ãå«ããå ç»å圢æè£ çœ®ã®å¶åŸ¡æ¹æ³ã an interference optical system including an optical scanner, which splits low-coherence light from a light source into measurement light and reference light, irradiates the measurement light deflected by the optical scanner onto an object to be measured, and causes interference between the reference light passing through a reference optical path and return light of the measurement light from the object to be measured;
a shielding member that is insertable into and detachable from the reference light path;
a spectroscopic member that spectroscopically separates the interference light between the return light and the reference light generated by the interference optical system, or the return light output from the interference optical system;
an image sensor that receives the light dispersed by the dispersing member;
A method for controlling an optical imaging device, comprising:
a first interference optical system control step of causing the interference optical system to generate the interference light by retracting the shielding member from the reference light path;
a tomographic image forming step of forming a tomographic image of the object to be measured based on a light receiving result obtained by receiving light obtained by dispersing the interference light by the image sensor;
a second interference optical system control step of outputting the return light from the interference optical system by inserting the blocking member into the reference light path;
a front image forming step of forming a front image of the object to be measured based on a light reception result obtained by receiving light obtained by dispersing the return light by the image sensor;
A method for controlling an optical imaging device, comprising:
åèšã€ã¡ãŒãžã»ã³ãµã¯ãåèšåææ Œåã«åœ¢æãããæ Œåãã¿ãŒã³ã®é åæ¹åã«å¯Ÿå¿ããæ¹åã«ïŒä»¥äžã®åå çŽ åãé åãããã©ã€ã³ã»ã³ãµã§ãã
ããšãç¹åŸŽãšããè«æ±é ïŒã«èšèŒã®å ç»å圢æè£ çœ®ã®å¶åŸ¡æ¹æ³ã the spectroscopic member is a diffraction grating,
8. The method for controlling an optical imaging device according to claim 7, wherein the image sensor is a line sensor in which two or more light receiving elements are arranged in a direction corresponding to an arrangement direction of a grating pattern formed on the diffraction grating.
åèšæ£é¢ç»å圢æã¹ãããã¯ãåæ£é¢ç»åã®ç»çŽ æ¯ã«åèšïŒä»¥äžã®åå çµæã®ããããã«å¯Ÿå¿ããç»çŽ æ å ±ãå²ãåœãŠãããïŒä»¥äžã®åèšæ£é¢ç»åã圢æãã
ããšãç¹åŸŽãšããè«æ±é ïŒã«èšèŒã®å ç»å圢æè£ çœ®ã®å¶åŸ¡æ¹æ³ã The tomographic image forming step forms the tomographic image based on two or more light receiving results in the two or more light receiving elements,
The control method for an optical image forming device according to claim 8, characterized in that the front image forming step forms two or more of the front images, each of which is assigned pixel information corresponding to each of the two or more light receiving results for each pixel of the front image.
åèšæ£é¢ç»å圢æã¹ãããã¯ãåèšïŒä»¥äžã®åå çŽ åã«ãããè€æ°ã®åå çµæã«å¯Ÿããããã³ã°åŠççµæã«å¯Ÿå¿ããç»çŽ æ å ±ãåæ£é¢ç»åã®ç»çŽ æ¯ã«å²ãåœãŠãããšã§ïŒä»¥äžã®åèšæ£é¢ç»åã圢æãã
ããšãç¹åŸŽãšããè«æ±é ïŒã«èšèŒã®å ç»å圢æè£ çœ®ã®å¶åŸ¡æ¹æ³ã The tomographic image forming step forms the tomographic image based on two or more light receiving results in the two or more light receiving elements,
The control method for an optical image forming device according to claim 8, characterized in that the front image forming step forms two or more of the front images by assigning pixel information corresponding to a binning processing result for a plurality of light receiving results in the two or more light receiving elements to each pixel of each front image.
ããšãç¹åŸŽãšããè«æ±é ïŒïŒã«èšèŒã®å ç»å圢æè£ çœ®ã®å¶åŸ¡æ¹æ³ã The control method for an optical image forming device according to claim 10, characterized in that the front image forming step forms the single front image by assigning pixel information corresponding to a binning processing result for all light receiving results in the two or more light receiving elements to each pixel.
ããšãç¹åŸŽãšããè«æ±é ïŒã«èšèŒã®å ç»å圢æè£ çœ®ã®å¶åŸ¡æ¹æ³ã 10. The method for controlling an optical image forming device according to claim 9, characterized in that the front image forming step divides the two or more light receiving elements into a plurality of light receiving element groups, performs a binning process on the light receiving results of the light receiving elements for each of the plurality of light receiving element groups, and assigns pixel information corresponding to the binning process result to each pixel, thereby forming the two or more front images as two or more spectral images.
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