JP4128056B2 - Medical TV camera device and ophthalmic imaging device using the same - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a medical television camera device and an ophthalmologic photographing apparatus using the same, and more particularly to a medical device having a suitable white balance adjustment switching function that cancels out the influence of a light source during fluorescent photographing such as the fluorescein method. The present invention relates to a television camera apparatus and an ophthalmologic photographing apparatus using the same.
[0002]
[Prior art]
In recent years, the number of patients with dry eye caused by using OA devices such as personal computers for a long time has increased, and cases of ophthalmic diseases such as corneal epithelial disorder and conjunctival disorder are increasing. In today's ophthalmologic diagnosis, one of the important diagnostic themes is how to easily capture these diseases.
[0003]
Conventionally, as a method of photographing patients suffering from these ophthalmic diseases, a photographing method using vital staining, such as a fluorescein method, has been widely performed. The fluorescein method is an imaging method in which a fluorescent substance called fluorescein sodium is instilled into a patient's eye and then irradiated with excitation light consisting of a blue short wavelength light source using a slit lamp toward a patient such as the cornea. is there.
[0004]
The imaging device in this diagnosis is taken using either a still camera or a television camera depending on the purpose. For example, when a television camera is used, the affected part is usually photographed by adjusting the white balance under a white light source such as a halogen lamp. When there is a disease in the cornea or the like, green fluorescence from the excitation light is emitted from the diseased part. In the ophthalmologic diagnosis, the degree of the disease of the patient is quantified by measuring these fluorescence amounts, and the diagnosis is performed.
[0005]
Examples of this type of prior art document include, for example, JP-A-8-117192 (conventional example 1), JP-A-9-201334 (conventional example 2), etc. as patent documents. There are "Cerebrovascular staining with medical lens" (Japanese Journal of Medical Photography, 1998, Vol. 36, No. 3, P59-66) (conventional example 3).
[0006]
Conventional Example 1 is an ophthalmologic photographing apparatus that includes an illumination optical system that illuminates a subject's eye and a photographing optical system that has a video camera that photographs the subject's eye illuminated by the illumination optical system. Therefore, the brightness of the video image can always be made appropriate without using the AGC (auto gain control) of the video camera.
[0007]
Conventional Example 2 relates to an ophthalmologic apparatus for diagnosing dry eye by observing an interference pattern on the tear fluid surface layer of an eye to be examined, and setting a plurality of areas for imaging of the interference pattern and calculating the hue of these areas Thus, the present invention relates to an ophthalmologic apparatus for diagnosing dry eye by hue for each area.
[0008]
Conventional Example 3 relates to corneal vital staining imaging using a medical lens, and examines the usefulness of fluorescein corneal staining imaging using a fluorescent filter in a close-up device in which a long-focus medical lens is mounted in a single-lens reflex camera.
[0009]
[Problems to be solved by the invention]
However, in conventional medical TV camera devices, white balance adjustment is performed so that when the patient's eyes are photographed, the encoder output of the camera is zero subcarrier, Adjustments are made under a white light source. When fluorescent photography is performed under a blue light source in order to perform optometry by the fluorescein method as described above by the television camera device adjusted in this way, only the blue signal level is abnormal in the signal processing inside the camera. There was a phenomenon of increasing. For this reason, the green fluorescent color from the diseased part of the eye to be examined is defeated by the intensity of the blue light source, and there is a problem that the stained part of fluorescein sodium that is the diseased part cannot be identified in the photographed image. . Such a problem is common to the conventional examples 1 and 2.
[0010]
In addition, when observing the affected part directly with the naked eye, the eyes gradually become accustomed even under a blue light source due to human perception constancy, so it is possible to identify the fluorescein sodium stained part, which is a diseased part. it can. However, although the stained part can be identified with the naked eye, there is a problem that the stained part cannot be identified on a monitor photographed by a television camera.
[0011]
In addition, AWB (auto white balance) in a conventional television camera apparatus is fixed without performing gain control of the G channel signals of the R (red), G (green), and B (blue) channel signals, and the iris (lens side). The exposure adjustment mechanism) is adjusted so that the input level is 100% of the luminance signal level (100IRE), and then the gains of the R and B channel signals are controlled so that the signal levels of the respective channels are aligned and the white balance is adjusted. I'm taking it. However, when shooting under blue light from a slit lamp, the amount of light is insufficient depending on the slit width, and the signal level of the G channel reaches 100 IRS, but reaches 100 IRS even when the gain of the R channel signal is maximized. The image taken with the TV camera device adjusted in this way may feel uncomfortable due to the lack of red light (wavelength around 600 nm) and can be used as a medical TV camera device. There was no.
[0012]
The present invention has been made in view of the above problems, and uses a medical television camera device having a setup switching function capable of easily imaging a diseased part under a blue light source photographing such as a fluorescein method, and the like. An object of the present invention is to provide an ophthalmologic photographing apparatus.
[0013]
[Means for Solving the Problems]
  The present invention achieves the above-mentioned problems, and the invention according to claim 1 reproduces the white balance adjustment value by selecting setup information stored in advance by a switching operation corresponding to the type of light source that illuminates the subject. In the medical TV camera device
  A memory for storing the setup information including information for setting at least a white balance adjustment value for a blue light source;,
  Each of R (red), G (green), and B (blue) obtained by color-separating subject lightGain adjusting means capable of adjusting each gain of the channel signal;
  Based on the setup information stored in the memory, when the light source is a blue light source, the gain of the R channel signal is decreased by maximizing the gain of the R channel signal and then decreasing the signal level of the B channel and the G channel. And a control means for controlling the gain adjusting means so as to meet the requirements.
  The present invention also provides a gain switching means (gain switching section) that can increase the gain of the RGB channel signal, a gain adjustment section (gain adjustment section) that can adjust the gain of each channel signal from the gain switching section, Level detecting means (level detecting section) for detecting the signal level of each channel signal from the adjusting means.
[0014]
  In the invention of claim 1,In a medical TV camera device that reproduces a white balance adjustment value by selecting pre-stored setup information by a switching operation corresponding to the type of light source that illuminates the subject,
  A memory in which the setup information including information for setting at least a white balance adjustment value for a blue light source is stored;
  Gain adjusting means capable of adjusting gains of R (red), G (green), and B (blue) channel signals obtained by subjecting subject light to color separation;
  Based on the setup information stored in the memory, when the light source is a blue light source, the gain of the R channel signal is decreased by maximizing the gain of the R channel signal and then decreasing the signal level of the B channel and the G channel. The gain adjusting means to matchA medical television camera device characterized by comprising a control means for controlling, according to various light sourcesOptimum white balance adjustment is possible, especially when the light source is a blue light source, because the red light quantity is insufficient, the gain of the R channel is maximized by the gain adjustment means (gain adjustment unit). Then, the signal level of the B channel and the G channel is lowered and controlled so as to match the gain of the R channel, whereby a blue subject can be identified on the monitor screen. The R (red), G (green), and B (blue) signals from the color separation optical system are output through the gain switching means and the gain adjustment means and the level detection means, and are controlled by the gain switching means. As a configuration that can be controlled by the means, a configuration that adjusts the signal level of the output of the color separation optical system as described above enables optimal white balance adjustment according to various light sources.
[0015]
  Also,The present inventionComprises an exposure adjustment means for adjusting the amount of light from the subject, and the exposure adjustment meansControlControl by meansTherefore, it is possible to control the luminance signal level of a specific wavelength to be 100% (100 IRE), and to adjust according to the wavelength distribution of the light source.The
[0017]
  Also,The present inventionIs, HoBased on setup information that reproduces the weight balance adjustment value, SystemMeans,The in-adjusting means controls the B channel gain value to be lower and the R channel gain value to be higher than the white balance adjustment value for the white light source, and the gain switching means further increases the gain of all channels. To controlIt is possibleThe
[0018]
  The present invention also providesIn the medical TV camera device in which the setup information in the white balance adjustment is stored so that the influence of the wavelength of the blue light is offset when the setup information is taken under the blue light source of the subject (the diseased part). The white balance adjustment value can be easily identified even when a blue subject is photographed, and the white balance adjustment value is set so that the influence of the light of the blue wavelength is offset. Compared with the white light source, the gain value of the B (blue) channel is decreased, the gain value of the R (red) channel is increased, and the gain is adjusted so that the gain of all channels is increased by the gain switching means (gain switching unit). Thus, the control means controls the gain adjustment means and the gain switching means, and this white balance adjustment value It is stored in the memory as a setup information. By automatically adjusting the gain adjustment of the medical television camera device, it is not necessary to adjust to the optimum adjustment value each time, and the operation is simplified.
[0019]
  Also,BookInvention,The white balance adjustment value reproduced by the setup informationCut intoWhen all channels are gained up uniformly by the switching operation, this is the value obtained by adding the adjustment value based on the setup information to the gain-up value.The As described above, when the gain-up operation by the gain switching means is already performed by the switching operation, the adjustment value based on the setup information is set by adding to the gain-up value, so that the brightness of the light source or the photographing Corresponds to variations in the wavelength of light in the environment, and can be set to white balance adjustmentThe
[0021]
  Further, according to the present invention, when the white balance adjustment value reproduced by the setup information is provided with a manual operation for the switching operation and the adjustment value is already operated by the manual operation, the set value by the manual operation is set. The value set at the centerTherefore, when the gain of each channel is adjusted by this manual operation, for example, the paint volume, the white balance is adjusted based on the adjustment value to cope with variations in light source brightness and light wavelength in the shooting environment. Can be set for white balance adjustment.The
[0025]
  Claims2The medical television camera apparatus for selecting the setup information stored in advance and reproducing the white balance adjustment value by the switching operation corresponding to the type of the light source that illuminates the subject.Because,
  A memory for storing the setup information including information for setting at least a white balance adjustment value for a blue light source;,
  Each of R (red), G (green), and B (blue) obtained by color-separating subject lightGain adjusting means capable of adjusting each gain of the channel signal;
  Exposure adjustment means for adjusting the amount of light from the subject;
  Based on the setup information, when the light source is a blue light source, the gain adjustment unit is controlled to lower the gain of the G channel signal, and then the exposure adjustment unit is controlled so that the signal level of the G channel becomes maximum. And a control means for controlling the gain adjusting means so as to match the signal level of the R channel and the B channel with the signal level of the G channel.
[0026]
  Claim2In the invention, when the light source is a blue light source, the luminance signal level of the signal level of the G channel becomes maximum after the gain adjustment unit lowers the G channel gain in advance to lower the blue level. In this way, the exposure adjustment unit is controlled so that the signal level of the R channel and the B channel is matched with the signal level of the G channel by the gain adjustment unit, and a blue subject can be identified on the monitor screen. .
[0027]
  According to a third aspect of the present invention, there is provided an ophthalmic photographing apparatus that includes an illumination optical system that illuminates a subject's eye in the photographing system of the medical television camera device according to the first or second aspect, and photographs the subject's eye by the photographing system. There,
  The illumination optical system is provided with a sensor for detecting the switching of the light source, and a detection signal from the sensor is input to the control means of the medical television camera device to reproduce the white balance adjustment corresponding to the detection signal. ofAboveSelect setup information and reproduce the white balance adjustment value of the medical TV camera deviceAndAn ophthalmologic photographing apparatus for photographing the eye to be examined.
[0028]
  Further, the invention of claim 3 is the invention of claim 1.Or 2An ophthalmic imaging apparatus that includes an illumination optical system that illuminates a subject's eye in an imaging system using the medical television camera device described in
The illumination optical system is provided with a sensor for detecting the switching of the light source, and a detection signal from the sensor is input to the control means of the medical television camera device to reproduce the white balance adjustment corresponding to the detection signal. The ophthalmologic photographing apparatus is characterized in that the setup information is selected, the white balance adjustment value of the medical television camera apparatus is reproduced, and the eye to be examined is photographed.
[0029]
  Claim3The invention is an ophthalmologic photographing apparatus provided with an illuminating optical system for illuminating the subject's eye, in addition to the photographing system of the medical television camera device according to any one of claims 1 to 7, which is illuminated by the illumination optical system. The examined eye is photographed by the photographing system. Since the illumination optical system is provided with a sensor for detecting the type of the light source, switching of the light source in the illumination optical system is detected by a detection signal from the sensor. It is an ophthalmic imaging device that is controlled so that the setup information of the TV camera device is automatically selected and is easy to operate, and the setup information is stored in the memory of the imaging system. There is no need to make adjustments, and by simply selecting the setup information, the monitor has an effect that the image of the blue subject can be displayed in an identifiable manner.
[0030]
[Signal system]
In the signal system of the medical television camera device of this embodiment, subject light of each color of R (red), G (green), and B (blue) that has passed through the photographing lens and is split by the optical prism is photoelectrically converted. Thus, R, G, B channels (hereinafter referred to as channels) 12R, 12G, 12B output Rch, Gch, and Bch signals, and increase the gain of the Rch, Gch, and Bch signals. Can be switched uniformly by on / off control, and a gain adjusting unit (Rch gain adjusting unit 14R, Gch for Rch) that can adjust each gain of the Rch signal, Gch signal, and Bch signal, respectively. Output from the gain adjusting unit 14G, Bch gain adjusting unit 14B) 14 and the Rch, Gch, Bch gain adjusting units 14R, 14G, 14B. And R, and a level detector 15 for detecting G, mutual signal level of the B signal.
[0031]
[Control system]
The control system of the medical television camera apparatus according to the present embodiment includes a control switch 16 and a control unit (control unit) 17. The control unit (control unit) 17 includes a memory 11 in which setup information is stored. It has been. The control switch 16 is a switch that reproduces white balance adjustment under a white light source (white balance adjustment button), a mode changeover switch that performs white balance adjustment based on the type of light source, and a manual operation of the gain of Rch and Bch. And a gain up switch (a switch that can uniformly increase the gain of all channels). Based on the control signal from the control switch 16, the control unit 17 sends a gain control signal to the gain switching unit 13, the Rch gain adjusting unit 14R, and the Bch gain adjusting unit 14B, and adjusts the respective gains. It has a function. Further, the control unit 17 can output a control signal for controlling the IRIS adjustment unit (exposure adjustment unit) 18 in order to adjust the light amount. The IRIS adjustment unit includes a mechanism for adjusting the iris (iris) of the lens and an electronic shutter function of the CCD.
[0032]
Next, regarding the operation of the present embodiment, each operation of the signal system and the control system will be described assuming fluorescence imaging under a blue light source.
[0033]
[Signal operation]
The operation of the signal system of this embodiment will be described. The eye to be examined is illuminated with a slit lamp, and reflected light (including green fluorescence) is emitted from the eye to be examined. The reflected light is split by an optical prism through a photographing lens and received by an image sensor for each of R (red), G (green), and B (blue) channels. Then, after photoelectric conversion for each channel, the Rch signal, Gch signal, and Bch signal of each channel are input to the gain switching unit 13.
[0034]
When the fluorescent color is dark from the eye to be examined and the signal is at a very low level, the gain switching unit 13 uniformly gain-amplifies all the channels by a gain control signal from the control unit 17 described later. Thereafter, the signal is input to the gain adjusting unit 14 (Rch gain adjusting unit 14R, Gch gain adjusting unit 14G, Bch gain adjusting unit 14B) for each channel. When the operator operates the white balance adjustment button of the control switch 16, the gains of the Rch gain adjustment unit 14R and the Bch gain adjustment unit 14B are individually set by the gain control signal from the control unit 17 so as to have predetermined values. Controlled.
[0035]
  The R, G, and Bch signals whose gains have been adjusted in this way are input to the level detection unit 15. The level detection unit 15 detects the signal level for each channel, and those signals are detected only while adjusting the white balance.controlIt is fed back to the unit 17 and set to a predetermined gain value. The setup information including the gain value at this time is also stored in the memory 11 inside the control unit 17. Thereafter, the video signal whose gain value has been adjusted is sent to a signal processing system, where it is subjected to processing such as color demodulation and gamma correction, and is encoded into a predetermined video signal such as the NTSC system. The normal Gch gain adjusting unit 14G is fixed so as not to perform gain control.
[0036]
[Control system operation]
The operation of the control system of this embodiment will be described. First, a white chart is adjusted by photographing a gray chart or a white subject with a medical television camera device in advance under a blue light source. At this time, the gain adjustment value for the white balance at this time is set in the control unit 17 as a blue light source mode (a setting in which the gain of the B channel is lowered and the R channel is raised compared to the normal white light source mode). It is stored in a certain memory 11. Thereafter, white balance adjustment is performed under a white light source, and shooting is normally performed with this adjustment value. When shooting under a white light source and switching to fluorescent shooting, switch the illumination from the normal white light source to the blue light source, and operate the mode switch button for the blue light source, which is one of the control switches 16, to turn it on. State.
[0037]
When the mode switching button of the control switch 16 is operated, the mode switching signal is transmitted to the control unit 17 and setup information stored in the memory 11 in the control unit 17 (gain adjustment of each channel with a blue light source). Value). The control unit 17 sends a gain control signal to the Rch amplifier 14R and the Bch amplifier 14B according to the setup information. In this way, the white balance adjustment value under the blue light source is reproduced.
[0038]
Furthermore, in the present embodiment, in consideration of the fact that the green fluorescent color under the blue light source is generally dark and difficult to see, after the white balance with the blue light source is reproduced, the gain switching unit 13 sets the gains of all the channels. For example, the gain is increased by +12 db. If necessary, the operator can manually set + 6db or + 3db.
[0039]
If it is desired to return to the white balance mode for a normal white light source, it can be restored by pressing the mode switch button of the control switch 16 operated as described above again. In this case, the original function can be restored even in the reverse order of the above procedure. As another function, a simple function may be provided in which only the gain value of the B channel is instantaneously reduced only by operating the button of the control switch 16 unit.
[0040]
As is well known, white balance detects the color temperature of the light source of the subject being photographed by the camera and controls the achromatic color to be achromatic, that is, white to be white. It works to keep the reproduction optimal. In particular, a television camera for ophthalmologic imaging that frequently uses fluorescent imaging by vital staining may greatly affect the ophthalmologic diagnosis result (for example, the degree of corneal epithelial disorder) due to color reproducibility. In this way, multiple setup information including white balance is stored in the memory, and each mode is properly used according to the shooting method, so that color reproduction is maintained optimally and the diagnosis of the diseased part is possible. Yes, it is very important in ophthalmic diagnosis.
[0041]
Also, when using the medical TV camera device according to the present invention, each switch (gain up button, Rch and Bch paint volume (manual gain adjustment means by manual operation)) on the control panel is operated according to the shooting state. In such a case, there is a case where the mode switching function works, and the operation of the mode switching function in each operation will be described below.
[0042]
First, when switching to the blue light source mode, the case where the gain up button of the control switch 16 has already been pressed will be described. The gain up button is operated, and all the channels are controlled based on the control signal from the control unit 17. The gain is uniformly increased by the gain switching unit 13. In this case, the gain increase value is added as it is to the gain adjustment value for the blue light source. This is particularly effective when it is desired to display the fluorescent color more clearly.
[0043]
On the other hand, if the Rch and Bch paint volumes of the control switch 16 have already been operated, the white balance is adjusted based on the adjustment value set at the position where the volume is turned, and after the adjustment. However, the paint function works around that position. Therefore, for example, if the white balance is adjusted while the paint volume is operated in the direction of increasing the gain, the adjustment range in the direction of increasing the gain becomes narrower thereafter, but the adjustment range in the direction of decreasing the gain becomes wider. This is effective when lowering the signal level of Rch and Bch with respect to the signal level of. This is particularly effective when it is desired to adjust the gain adjustment range.
[0044]
Next, another embodiment of the medical television camera apparatus of the present invention will be described with reference to FIG. Although this embodiment has the same block diagram as the above-described embodiment, the Gch gain is adjusted while the Gch gain is normally fixed. In this embodiment, when the light source is a blue light source such as a slit lamp, the amount of light from the eye to be examined (subject) is small and the Gch luminance signal level reaches 100% (100 IRE), but the Rch gain is maximized. If 100 IRE is not reached, the control switch 16 switches to the blue light source mode, and based on the mode switching signal, the control means (control unit 17) controls the Rch gain adjustment unit 14R to obtain the Rch gain. So that the signal level of Bch and Gch is lowered by controlling the Bch gain adjusting unit 14B and the Gch gain adjusting unit 14G, and adjusted to the R channel gain. This is a medical television camera device that is adjusted so that the subject's eye photographed under a blue light source can be confirmed on a monitor.
[0045]
Further, another embodiment of the present invention will be described with reference to FIG. 1. In this embodiment, the lens of the medical television camera apparatus includes an IRIS adjustment unit (exposure adjustment means) 18. The control unit 17 can output a control signal for controlling the IRIS adjustment unit 18. The IRIS adjustment unit 18 includes a mechanism for adjusting the iris (iris) of the lens and an electronic shutter function of the CCD.
When the light source of the eye to be examined is a blue light source, since the red light quantity is insufficient, the control switch 16 switches to the blue light source mode, and the gain adjusting unit 14 uses the Gch gain adjusting unit 14G based on the mode switching signal. , The Gch gain is intentionally lowered, and the IRIS adjustment unit 18 is adjusted so that the output of the Gch gain adjustment unit 14G becomes 100 IRIS. Thereafter, the outputs from the Rch gain adjusting unit 14R and the Bch gain adjusting unit 14B are controlled so as to coincide with the Gch signal level so that the reflected light from the blue subject can be identified on the monitor screen.
[0046]
Next, an embodiment of the ophthalmologic photographing apparatus according to the present invention will be described with reference to FIG. FIG. 2 is a schematic configuration diagram showing an embodiment of an ophthalmologic photographing apparatus using a medical television camera apparatus (FIG. 1). The configuration includes an illumination optical system and an imaging system, and the imaging system is the medical television camera apparatus shown in FIG.
[0047]
[Illumination optics]
The present embodiment will be described first in the order of the optical path of the illumination optical system. As the white light source 21 for illuminating the eye 26E, a halogen lamp or the like is used, and the amount of light is appropriately adjusted by a dimmer (not shown). The light emitted from the white light source 21 is guided by the light source lens 22, passes through the cobalt filter 23a, and selectively transmits light of a short wavelength (blue). Switching to the blue light source is performed by inserting the cobalt filter 23a into the illumination light path by sliding it manually or by driving a solenoid drive circuit. The blue light thus obtained is totally reflected by the mirror 24, passes through the slit 25, is narrowed down into a slit shape, and is projected onto the eye 26E.
[0048]
[Shooting system]
The reflected light is enlarged as necessary via the photographing lens 27 and received by the CCD camera 28 as subject light. As described in the medical television camera apparatus of FIG. 1, the CCD camera 28 stores setup information under a blue light source, and can read and reproduce the setup information simply by operating a mode switching button. A balance control unit (control means) 29 is provided. Note that the white balance control unit 29 has substantially the same function as the control unit 17 of the embodiment of FIG. 1, but the following functions are different.
[0049]
In this embodiment, in consideration of operability as an ophthalmologic photographing apparatus, the sensor 23b detects that the cobalt filter 23a is slid and inserted so as to cut the optical axis of the light source 21, and the detection signal is a CCD camera. 28 is sent to the white balance control unit 29 in 28. With this configuration, the white balance control unit 29 detects that the blue light source has been switched, and at the same time, automatically selects setup information corresponding to this to adjust the white balance under the blue light source. The value can be reproduced.
[0050]
Note that the present invention is not limited to this embodiment, and the white balance adjustment value under the light source is similarly set even when used for other types of fluorescent photographing, for example, infrared fluorescent photographing. Of course, by setting and storing, an appropriate white balance adjustment value can be quickly set.
[0051]
【The invention's effect】
As described above, according to the present invention, when setup information for a blue light source, for example, is selected by operating a white balance adjustment switching unit provided in a medical television camera device, Based on this, the white balance adjustment value can be reproduced. Therefore, even when it is desired to switch the subject to fluorescent photographing, there is an advantage that it is possible to provide a medical television camera device that can respond immediately by operating the mode switching button and can easily photograph a diseased part. is there.
[0052]
Further, according to the present invention, it is not necessary to adjust the white balance every time the illumination color is switched as in the prior art, so that the labor of the operator is saved, and an ophthalmology that can realize a quick ophthalmic diagnosis with simple operability. There is an advantage that a photographing apparatus can be realized.
[Brief description of the drawings]
FIG. 1 is a block diagram showing an embodiment of a medical television camera apparatus of the present invention.
FIG. 2 is a schematic configuration showing an embodiment of an ophthalmologic photographing apparatus using the medical television camera apparatus of the present invention.
[Explanation of symbols]
11 memory
12R, 12G, 12BR R, G, B channels
13 Gain switching section
14 Gain adjuster
14R Rch gain adjuster
14G Gch gain adjuster
14B Bch gain adjuster
15 level detector
16 Control switch
17 Control unit (control means)
21 White light source
22 Light source lens
23a Cobalt filter
23b sensor
24 mirror
25 slits
27 Shooting lens
28 CCD camera
29 White balance control unit (control means)

Claims (3)

In a medical TV camera device that reproduces a white balance adjustment value by selecting pre-stored setup information by a switching operation corresponding to the type of light source that illuminates the subject,
A memory in which the setup information including information for setting at least a white balance adjustment value for a blue light source is stored;
Gain adjusting means capable of adjusting gains of R (red), G (green), and B (blue) channel signals obtained by subjecting subject light to color separation ;
Based on the setup information stored in the memory, when the light source is a blue light source, the gain of the R channel signal is decreased by maximizing the gain of the R channel signal and then decreasing the signal level of the B channel and the G channel. And a control means for controlling the gain adjusting means so as to match with the medical television camera apparatus. A medical television camera device that reproduces a white balance adjustment value by selecting setup information stored in advance by a switching operation corresponding to the type of light source that illuminates a subject,
A memory in which the setup information including information for setting at least a white balance adjustment value for a blue light source is stored;
Gain adjusting means capable of adjusting gains of R (red), G (green), and B (blue) channel signals obtained by subjecting subject light to color separation;
Exposure adjustment means for adjusting the amount of light from the subject;
Based on the setup information, when the light source is a blue light source, the gain adjustment unit is controlled to lower the gain of the G channel signal, and then the exposure adjustment unit is controlled so that the signal level of the G channel becomes maximum. and, R and B channels, wherein the to that physician Ryoyo television camera apparatus Rukoto and control means for controlling the gain adjustment means to match the signal level of the G channel signal level. An ophthalmologic photographing apparatus that includes an illumination optical system that illuminates an eye to be examined in the photographing system of the medical television camera device according to claim 1,
The illumination optical system is provided with a sensor for detecting the switching of the light source, and a detection signal from the sensor is input to the control means of the medical television camera device to reproduce the white balance adjustment corresponding to the detection signal. The ophthalmic imaging apparatus is characterized in that the setup information is selected, the white balance adjustment value of the medical television camera apparatus is reproduced, and the eye to be examined is photographed .

Images