TWI693441B - Combined lens module and image capturing sensing assembly - Google Patents

Abstract

A combined lens module includes plural lens modules deposited within a housing. These lens modules include plural lenses and multiple apertures. Each lens includes a main lens unit for visible light and an associated lens unit for infrared-red light. An image capturing sensing assembly may be performed by equipping such a combined lens module and a sensor for visible and infrared-red light, which may have high-resolution and apply to environment equipped with infrared-red structured lighting, thin portable device, or light scanner for human interaction field.

Description

Combined lens module and camera sensing component using the module

This case relates to the field of a combined lens module, especially a lens module applied to a thin electronic device and its imaging device field.

In the current technological development, the interaction technology between humans and machines has attracted attention, and various platforms have been developed to improve human daily life and health. The I/O interface that humans rely on for machine interaction is no longer limited to traditional physical devices, such as keyboards, mice, or touch pads. It also includes the use of human-owned sounds, actions, or gestures as input elements. Therefore, components, devices or equipment used to detect interactive gestures, gestures or 3D scanning are very vigorously developed fields in recent years. For example, infrared light can be used for the above detection side. The advantage is that it is invisible and avoids interference. The actions of the author and in many cases can increase the signal-to-noise ratio, and thus become an important structured light element for identifying interactive actions.

On the other hand, the modern habit of using camera phones to take pictures is becoming more and more popular, and the demand for devices equipped with high-resolution camera modules is also increasing. In addition to the camera function, if the side detection function for detecting interactive gestures can be integrated, mobile devices such as camera phones will be more widely used. Therefore, the development of a compact size and multi-functional camera module is one of the important issues for the mobile phone equipped with a structured generating device.

In order to solve the above problem, the present case provides a combined lens module, which includes a plurality of lenses, and each lens has one or more lens units, so that the angle of view of the combined lens module is increased.

In order to solve the above problems, the present case provides a combined lens module and its imaging sensing component, which includes a plurality of lenses, each lens has a lens unit that can pass infrared light and visible light, and cooperates to sense visible light and infrared light at the same time The sensor can simultaneously receive external visible light and infrared light signals.

In order to solve the above problems, the present case provides a combined lens module and its imaging sensing component, which include a plurality of lenses and are housed in a housing. The size of the housing can be very compact, which is suitable for thin and light mobile devices.

According to the above, a combined lens module includes: a housing; and a plurality of lens modules accommodated in the housing, the lens modules including a plurality of lenses and having a plurality of apertures, wherein the external The optical signal reaches the housing and passes through the lens modules. Any one of the lenses includes a main lens unit that provides visible light and an associated lens unit that passes infrared light.

Preferably, the main lens unit is located in a central area of the lens, and the associated lens unit is located in a surrounding area of the lens.

Preferably, the number of the lenses is 3 and stacked in the housing, and the combined lens module further includes a light bar.

Preferably, the main lens units include a first main lens unit, a second main lens unit and a third main lens unit, and the beam is located between the first main lens unit and the second main lens unit In the meantime, external visible light passes through the main lens unit, the light bar, and the first After the two main lens units and the third main lens unit reach a sensor, the refractive power of the third main lens unit is positive.

Preferably, the refractive powers of the first main lens unit and the second main lens unit are both positive.

Preferably, wherein the main lens units include a first main lens unit, a second main lens unit and a third main lens unit, and the light bar is located between the first main lens unit and the housing The visible light from the outside passes through the light barrier, the first main lens unit, the second main lens unit and the third main lens unit in order to reach a sensor, and the refractive power of the third main lens unit is positive.

Preferably, the refractive power of the first main lens unit is a positive number, and the refractive power of the second main lens unit is a negative number.

Preferably, the apertures include a main aperture corresponding to the main lens units, and at least one associated aperture corresponding to the associated lens units, and the image aperture of the associated aperture overlaps at least a portion of the image aperture of the main aperture.

According to the above, a camera sensing assembly includes: a housing; a plurality of lens modules housed in the housing, the lens modules including a plurality of lenses and having a plurality of apertures, wherein the apertures include A main aperture corresponding to the outside visible light entering the housing and an associated aperture corresponding to the outside infrared light passing; and a sensor which senses the outside visible light and the outside infrared light passing through the apertures.

Preferably, the sensor includes a non-Bayer sensor.

Preferably, each of the lenses includes a plurality of lens units, a main lens unit located in a central area of each lens is stacked to form the main aperture, and is located in the central area The surrounding at least one associated lens unit is stacked to form the associated aperture.

Preferably, the camera sensing assembly further includes a light bar, wherein the main lens units include a first main lens unit, a second main lens unit, and a third main lens unit, and the light bar is located at the first The main lens unit and the second main lens unit, or the shutter is located between the first main lens unit and the housing.

Preferably, the refractive powers of the first main lens unit and the third main lens unit are positive numbers, respectively.

A combined lens module includes a plurality of lens modules housed in a housing, the lens modules include a plurality of lenses and have a plurality of apertures, any one of the lenses includes a main An associated lens unit through which the lens unit and infrared light pass. This combined lens module cooperates with a sensor that can receive both visible light and infrared light to form a camera sensing component, which not only has high resolution, but also can be used in the environment of infrared light structure light sources, thin mobile devices or somatosensory interactive Optical scanners and other aspects.

In order to be able to further understand the technology, means and effects of the present invention to achieve the intended purpose, please refer to the following detailed description and drawings of the present invention. The purpose, features or characteristics of the present invention can be obtained through an in-depth and specific understanding. However, the accompanying drawings are provided for reference and explanation only, and are not intended to limit the present invention.

10‧‧‧Combined lens module

11‧‧‧Body

13‧‧‧Housing

12‧‧‧Lens assembly

120‧‧‧ First lens module

122‧‧‧Second lens module

124‧‧‧ Third lens module

126‧‧‧The fourth lens module

128‧‧‧ fifth lens module

201‧‧‧Main optical axis

203‧‧‧Related optical axis

22‧‧‧ long

24‧‧‧ wide

23, 25‧‧‧ image circle

232, 234, 236, 238

252, 254, 256, 258

32, 34, 36‧‧‧ lens

31‧‧‧The first main lens unit

41‧‧‧The first related lens unit

42‧‧‧Second related lens unit

33‧‧‧Second main lens unit

43‧‧‧The third related lens unit

44‧‧‧The fourth lens unit

35‧‧‧The third main lens unit

45‧‧‧Fifth related lens unit

46‧‧‧Sixth related lens unit

311‧‧‧First surface

331‧‧‧First surface

351‧‧‧First surface

30‧‧‧ light bar

40‧‧‧Sensor

52, 54, 56‧‧‧ lens

51‧‧‧First main lens unit

71, 72, 73 ‧‧‧ optical image signal

74‧‧‧sensing pixels

75, 76, 77, 78 ‧‧‧ pixel unit

61‧‧‧The first related lens unit

62‧‧‧Second related lens unit

53‧‧‧Second main lens unit

63‧‧‧The third related lens unit

64‧‧‧The fourth lens unit

55‧‧‧The third main lens unit

65‧‧‧The fifth lens unit

66‧‧‧Sixth related lens unit

27‧‧‧Image Circle

272, 274, 276, 278

FIG. 1 is a schematic perspective view of a combined lens module.

FIG. 2 is a schematic diagram of an image circle embodiment of the associated aperture in this case.

FIG. 3 is a schematic diagram of another image circle embodiment of the associated aperture in this case.

4 is a cross-sectional part and other elements of a lens assembly according to a first embodiment of this case Schematic diagram of the section of the piece.

FIG. 5 is a schematic diagram of a sensing unit of a sensor in this case.

6 is a schematic diagram of a cross-sectional portion of a lens assembly and other components in a second embodiment of the present invention.

7 is a schematic diagram of the image circle of FIG. 6.

The lens assembly (hereinafter referred to as a lens assembly) in this case includes a plurality of apertures, and each aperture can have its own lens module. Each lens module may include one or a plurality of lens elements (lens element), wherein the plurality of lens elements may be staggered along the optical axis of the lens module, that is, the lens units are away from the objective plane ) Or the distance of the image plane. The lens unit between different lens modules can be separated into a plurality of lenses or integrated into a single lens. For example, the lens unit is made into a lens together by plastic molding. Different lens units on the same lens can have their own functions, which will be described later.

FIG. 1 is a schematic perspective view of a combined lens module. Referring to FIG. 1, the combined lens module 10 includes a base 11, a housing 13 disposed in the base 11, and a lens assembly 12 disposed in the housing 13. In this embodiment, the base 11 accommodates and fixes the housing 13 with the lens assembly 12, and may also include several structures that can be fixed to other structures like circuit boards or that can be assembled with other objects. In actual design, the design of the seat body 11 can also be omitted. Secondly, the housing 13 is used to integrate the lens assembly 12 into a single component, such as upper and lower covers and side walls for fixing the lens assembly 12 therein. Of course, the ratio, installation position, size, and geometric shape of the seat body 11 and the housing 13 in FIG. 1 are for illustration only and not for limiting the design of this case.

Secondly, the lens assembly 12 includes a plurality of lens modules, such as a first lens module 120, a second lens module 122, a third lens module 124, a fourth lens module 126, and a fifth lens module 128. In this embodiment, the first lens module 120 is located in the central area of the housing 13 and is surrounded by the second lens module 122, the third lens module 124, the fourth lens module 126, and the fifth lens module 128 Among them, the arrangement between the lens modules may be regular or irregular, and the rule or the pair is called better. FIG. 1 is only an illustration and does not limit the design of the case. In addition, the lens assembly 12 has a plurality of apertures corresponding to the above-mentioned lens modules. For convenience, the first lens module 120 implements a main aperture (main optical axis 201), the second lens module 122, the first The three-lens module 124, the fourth lens module 126 (associated optical axis 203) and the fifth lens module 128 respectively implement different associated apertures. In this embodiment, the first lens module 120 of the main aperture is responsible for the visible light image passing through the detected side of the visible light sensing area, and the other lens modules associated with the aperture are responsible for the infrared light detected by the infrared light sensing area Image or optical signal acquisition, for example, the wavelength is 830nm, 850nm or 920nm. Furthermore, although a first lens module 120 is used in this case to achieve visible light image capture, in design, it is not limited to a single first lens module 120, but may also be plurally distributed in the center of the housing 13 The lens modules in the area are responsible for the passing of visible light images.

2 and 3 respectively show schematic diagrams of different image circle embodiments of the associated aperture in this case, to illustrate that the lens modules in this case can have different arrangements. For a 4 megapixel (4MP) sensor with a general format of 16:9, its length 22 is approximately 5.376 millimeters (mm) and width 24 is approximately 3.040 millimeters (mm). In order to utilize the maximum imaging of the sensor Capability, the image circles 23, 25 must have a diameter of at least 6.176 millimeters (mm). Therefore, as shown in FIG. 2, the associated apertures 232, 234, 236, and 238 are independent and completely non-overlapping and are designed within the image circle 23 and within the range of the length 22 and width 24 of the sensor. As shown in FIG. 3, the associated apertures 252, 254, 256, and 258 are independent but partially The stacked design is within the image circle 23 and covers several areas outside the range of the sensor's length 22 and width 24. According to the above, the cooperation of the main aperture and the associated aperture in this case basically satisfies the image circle covering the maximum imaging capability of the sensor used. The range of the main aperture and the associated aperture can be independent and completely non-overlapping, or can be partially Overlap, the arrangement form is the required design, and is not limited to factors such as symmetric, asymmetric, same or different aperture size. In addition, the main aperture and the plurality of associated apertures in this case can include viewing areas in different directions, so the lens assembly in this case can be a multiple view lens assembly, and the characteristics of each aperture can be viewed by the corresponding aperture Field (view of field, FOV) and field angle (field angle, FA) and aperture size are defined.

FIG. 4 is a schematic diagram of a cross-sectional part of a lens assembly and other components of a first embodiment of the present invention, and FIG. 5 is a schematic diagram of a sensing unit of a sensor of the present invention. Referring to FIGS. 1 and 4 simultaneously, the lens assembly 12 includes three lenses 32, 34, and 36, and each lens 32, 34, and 36 may include one or more lens units. In the first embodiment, the lens 32 includes a first main lens unit 31 and a first associated lens unit 41 and a second associated lens unit 42 disposed around the first main lens unit 31. Similarly, the lens 34 includes a second main lens unit 33 and a third associated lens unit 43 and a fourth associated lens unit 44 disposed around the second main lens unit 33; the lens 36 includes a third main lens unit 35 and a The fifth associated lens unit 45 and the sixth associated lens unit 46 around the three main lens unit 35, wherein each associated lens unit may be independent or belong to a continuous area in the same lens. Next, referring to FIG. 1, the first lens module 120 includes a first main lens unit 31, a second main lens unit 33, and a third main lens unit 35; the third lens module 124 includes a second associated lens unit 42, a fourth The associated lens unit 44 and the sixth associated lens unit 46; the fourth lens module 126 includes a first associated lens unit 41, a third associated lens unit 43, and a fifth associated lens unit 45. Understandably, the second lens module 122 and the fifth lens module 128 are not shown in FIG. 4 at this cross-sectional angle on. Furthermore, the lens 34 is disposed between the lens 32 and the lens 36, wherein the lens 32 faces the object surface with a first surface 311, the lens 34 faces the object surface and the lens 32 with a first surface 331, and the lens 36 has a first surface 351 faces the object plane and the lenses 32, 34. A light barrier 30 is still provided in front of a first surface 331 (object plane) of the lens 34, and a sensor 40 is behind the lens 36.

With continued reference to FIGS. 1 and 4, in the first embodiment, “XAXP” may be used to denote the lens configuration of the first lens module 120 including the main lens unit; where “X” denotes the lens orientation The refractive power or optical power (Optical Power, OP) of the surface of the object surface can be positive or negative; "A" indicates the position of the diaphragm 30; "P" indicates that the refractive power of the surface of the lens facing the object surface is positive; "N" It means that the refractive power of the lens-facing surface is negative. Therefore, the refractive power of the first main lens unit 31 of the first embodiment can be a positive number close to 0, preferably 0.1038, so that the corresponding field of view can be close to 80-90 degrees. Secondly, the refractive power of the second main lens unit 33 and the third main lens unit 35 is a positive number greater than that of the first main lens unit 31, preferably 0.1497 and 0.7552, respectively, but this case is not limited to this, the main consideration is that The lens configuration of a lens module 120 can provide enough space for light to pass through the first lens module 120 and other lens modules around it to reach the rear sensor 40 without mutual interference. In the lens configuration of the first lens module 120 of an embodiment, as long as the closest sensor 40 is positive refractive power, if it is necessary to set the diaphragm 30, the diaphragm 30 is disposed on the lens unit closest to the object plane Rear.

Therefore, with continued reference to FIG. 1 and FIG. 4, for example, a person has his arms flat (not shown) in front of the lens assembly, and the optical image signal 72 of the person’s torso is parallel to the front of the lens assembly 12 in parallel The direction of the main optical axis 201 enters the lens assembly, and the optical image signal 71 of a person's left-handed flat image and the optical image signal 73 of a right-handed flat enter the lens assembly at an angle (an angle not parallel to the main optical axis 201) and arrive感器40。 Sensor 40. The first lens module 120 of the first embodiment can provide sufficient space The optical image signal 72, the optical image signal 71, and the optical image signal 73 arrive at the sensor 40 without interference with each other, and are received by the sensor 40.

Furthermore, the combined lens module of this case can be combined with a sensor 40 to become an imaging component. Because the combined lens module of this case can allow visible light and infrared light outside the housing to pass through the lens module and reach the sensor 40 (see FIGS. 4 and 5), the sensor 40 can be capable of sensing both visible light and infrared light A non-Bayer sensor (non-Bayer sensor). 4 and 5, the sensor 40 may be arranged in a one-dimensional or two-dimensional array by a plurality of sensing pixels 74. Each sensing pixel 74 may include four pixel units 75, 76, 77, and 78, wherein the pixel unit 75 senses red light (R), the pixel unit 76 senses green light (G), and the pixel unit 77 senses blue light (B), and the pixel unit 78 senses infrared light or other invisible light. According to the above, the pixel unit 75, 76, 77 of each sensing pixel 74 is a part of the visible light sensing area of the sensor 40, and the pixel unit 78 is a part of the infrared light sensing area of the sensor 40.

Therefore, in this case, the visible light image signal passing through the main lens unit reaches the visible light sensing area of the non-Bell sensor, and the infrared light signal passing through the related lens unit reaches the infrared light sensing area of the non-Bell sensor, so a single unit can be used. A sensor is sufficient, which simplifies the components of the camera assembly. Of course, it can be understood that if the designer has other considerations, two or more separate sensors can also be used, which is responsible for receiving visible light image signals. A general Bayer sensor can be used to receive infrared light or other Those with visible light can use the corresponding sensor.

Furthermore, the image circle of the lens configuration shown in FIG. 4 can be as shown in FIG. 3, and the image circle 25 is the image circle of the first lens module 120. According to the lens configuration rule of "XAXP", all associated lenses can be made The image circle of the module can be within the range of the image circle of the first lens module 120, and The lens design of the first lens module has more degrees of freedom and higher resolution capabilities.

6 is a schematic diagram of a cross-sectional portion of a lens assembly and other components in a second embodiment of the present invention. Referring to FIGS. 1 and 6, the lens assembly 12 includes three lenses 52, 54, and 56. The lens 52 includes a first main lens unit 51 and a first associated lens unit 61 and a second disposed around the first main lens unit 51. Associative lens unit 62. Similarly, the lens 54 includes a second main lens unit 53 and a third associated lens unit 63 and a fourth associated lens unit 64 disposed around the second main lens unit 53; the lens 56 includes a third main lens unit 55 and a The fifth associated lens unit 65 and the sixth associated lens unit 66 around the three main lens unit 55. Furthermore, the lens 54 is disposed between the lens 52 and the lens 56, and the diaphragm 30 is disposed on the lens 52 closest to the object plane, forming a first lens module 120 with a lens configuration of “AXXP”, behind the lens 56则为一个 Sensor40。 The sensor 40. It should be noted that the optical image signal in FIG. 6 is similar to that in FIG. 4, and a part of the optical image signal is omitted in FIG. 6, which is not intended to limit the second embodiment of the present case.

Compared with the first embodiment, the second embodiment is disposed at the position closest to the object plane, and the refractive power of the third main lens unit 55 of the lens 56 closest to the sensor is a positive number, preferably 0.6924, the lens 52, The refractive power of the first main lens unit 51 and the second main lens unit 53 of 54 can be positive or negative, respectively. Preferably, the OP of the first main lens unit 51 is 3.964, and the OP of the second main lens unit 53 is -0.789, but this case is not limited to this.

7 is a schematic diagram of the image circle of FIG. 6. Please refer to FIGS. 1, 6 and 7, the image circle of the first lens module 120 (main lens module) is the image circle 27, and the remaining image circles belonging to the associated lens module are the image circles 272, 274, 276 and 278, where the image circles 272, 274, 276, and 278 partially overlap with the image circle 27, respectively, and the range 28 of captured images falls within the range of all the image circles described above.

According to the above, the lens module in this case combines multiple lenses, and each lens can have different lens units responsible for the penetration of visible light images and the passage of infrared light signals. Compared with the use of a single lens, the use of a combined lens can greatly improve The field of view (FOV) further improves the image quality of the associated field of view. Second, the lens unit responsible for the passing of the visible light image can be located in the central area of any lens, and the lens unit responsible for the infrared light signal can be located in the surrounding area of any lens. From a point of view, the lens unit responsible for the infrared light signal is actually an extension of the lens unit responsible for the visible light, which can increase the mechanical strength of the entire lens, and also allow the infrared light signal to pass through the sensor reaching the rear, taking into account the mechanical And optical properties; on the other hand, since any single lens can have different lens units responsible for the penetration of visible light images and the passage of infrared light signals, the lens module in this case is suitable for multiple aperture camera devices. Furthermore, the multiple lenses can be placed in a housing at the same time, so that the overall volume is small, suitable for thin electronic devices, such as smart phones. In addition, since the combined lens module of this case can receive both visible light and infrared light image signals, it can be applied to a number of occasions that use or require infrared light for detection, scanning, or other purposes, such as human interaction devices or occasions.

The above are only preferred embodiments of the present invention and are not intended to limit the scope of the claims of the present invention. Therefore, other equivalent changes or modifications made without departing from the spirit of the present invention should be included in this Within the scope of the invention.

10‧‧‧Combined lens module

11‧‧‧Body

13‧‧‧Housing

12‧‧‧Lens assembly

120‧‧‧ First lens module

122‧‧‧Second lens module

124‧‧‧ Third lens module

126‧‧‧The fourth lens module

128‧‧‧ fifth lens module

201‧‧‧Main optical axis

203‧‧‧Related optical axis

Claims (12)

A combined lens module includes: a housing; and a plurality of lens modules accommodated in the housing, the lens modules include a plurality of lenses and have a plurality of apertures, wherein the external optical signal arrives On the housing and through the lens modules, any one of the lenses includes a main lens unit that provides visible light and an associated lens unit that passes infrared light. The main lens unit and the corresponding associated lens unit are integrated into The same lens. The combined lens module of claim 1, wherein the main lens unit is located in a central area of the lens, and the associated lens unit is located in a surrounding area of the lens. The combined lens module according to claim 2, wherein the number of the lenses is 3 and is stacked in the housing, and the combined lens module further includes a beam. The combined lens module according to claim 3, wherein the main lens units include a first main lens unit, a second main lens unit, and a third main lens unit, and the diaphragm is located at the first Between the main lens unit and the second main lens unit, external visible light passes through the main lens unit, the light fence, the second main lens unit and the third main lens unit in order to reach a sensor, the first The refractive power of the three main lens units is positive. The combined lens module according to claim 4, wherein the refractive powers of the first main lens unit and the second main lens unit are both positive. The combined lens module according to claim 3, wherein the main lens units include a first main lens unit, a second main lens unit, and a third main lens unit, and the diaphragm is located at the first Between the main lens unit and the housing, external visible light passes through the light bar and the first A main lens unit, the second main lens unit, and the third main lens unit arrive at a sensor, and the refractive power of the third main lens unit is positive. The combined lens module according to claim 6, wherein the refractive power of the first main lens unit is a positive number, and the refractive power of the second main lens unit is a negative number. The combined lens module according to claim 1, wherein the apertures include a main aperture corresponding to the main lens units, and at least an associated aperture corresponding to the associated lens units, the image aperture of the associated aperture At least a part of the image circle of the main aperture overlaps. A camera sensing component includes: a housing; a plurality of lens modules accommodated in the housing, the lens modules including a plurality of lenses and having a plurality of apertures, wherein the apertures include corresponding entry housings A main aperture through which external visible light in the body passes and an associated aperture corresponding to the passing of external infrared light. Any one of the lenses includes a main lens unit that provides visible light and an associated lens unit that passes infrared light. The main lens unit and the corresponding The associated lens unit is integrated into the same lens; and a sensor that senses outside visible light and outside infrared light passing through the apertures. The imaging and sensing assembly according to claim 9, wherein each of the lenses includes a plurality of lens units, and a main lens unit in a central area of each of the lenses is stacked to form the main aperture, and is located in the central area The surrounding at least one associated lens unit is stacked to form the associated aperture. The imaging and sensing assembly according to claim 10, further comprising a beam, wherein the main lens units include a first main lens unit, a second main lens unit, and a third main lens unit, the beam Located between the first main lens unit and the second main lens unit, or the light field Between the first main lens unit and the housing. The imaging and sensing assembly according to claim 11, wherein the refractive powers of the first main lens unit and the third main lens unit are positive numbers, respectively.

Images