WO2021036721A1

WO2021036721A1 - Image sensor, imaging system, and terminal

Info

Publication number: WO2021036721A1
Application number: PCT/CN2020/106985
Authority: WO
Inventors: 张海裕
Original assignee: Oppo广东移动通信有限公司
Priority date: 2019-08-29
Filing date: 2020-08-05
Publication date: 2021-03-04
Also published as: CN110493504A; CN110493504B

Abstract

An image sensor (10), an imaging system (100), and a terminal (1000). The image sensor (10) comprises a metalens (16) and a pixel array (13) positioned at a light exiting side (166) of the metalens (16). The metalens (16) is used to split incident light rays entering from a light entering side (165) into exiting light rays having multiple different wavelengths. The exiting light rays having different wavelengths are emitted to the pixel array (13) from the light exiting side (166) at different exit angles.

Description

Image sensor, imaging system and terminal

Priority information

This application requests the priority and rights of the patent application with the patent application number 201910809194.2 filed with the State Intellectual Property Office of China on August 29, 2019, and the full text is incorporated herein by reference.

Technical field

This application relates to the technical field of consumer electronics, in particular to an image sensor, an imaging system and a terminal.

Background technique

In the related art, the image sensor generally splits light through a color filter array (CFA), splits the light into three colors of red, green and blue, and then enters the pixel array of the image sensor to perform photoelectric conversion for imaging.

Summary of the invention

The embodiments of the present application provide an image sensor, an imaging system, and a terminal.

The image sensor of the embodiment of the present application includes a super lens and a pixel array. The pixel array is located on the light exit side of the hyper lens, and the hyper lens is used to split the incident light from the light entrance side of the hyper lens to form a variety of exit light with different wavelengths. The outgoing light rays are emitted toward the pixel array from the light outgoing side at different outgoing angles.

The imaging system of the embodiment of the present application includes a lens group and an image sensor. The image sensor is arranged on the image side of the lens group. The image sensor includes a hyper lens and a pixel array. The pixel array is located on the light exit side of the hyper lens, and the hyper lens is used to split the incident light from the light entrance side of the hyper lens to form a variety of exit light with different wavelengths. The outgoing light rays are emitted toward the pixel array from the light outgoing side at different outgoing angles.

The terminal of the present application includes a housing and an imaging system. The imaging system is installed on the housing. The imaging system includes a lens group and an image sensor. The image sensor is arranged on the image side of the lens group. The image sensor includes a hyper lens and a pixel array. The pixel array is located on the light exit side of the hyper lens, and the hyper lens is used to split the incident light from the light entrance side of the hyper lens to form a variety of exit light with different wavelengths. The outgoing light rays are emitted toward the pixel array from the light outgoing side at different outgoing angles.

The additional aspects and advantages of the embodiments of the present application will be partly given in the following description, and part of them will become obvious from the following description, or be understood through the practice of the embodiments of the present application.

Description of the drawings

The above and/or additional aspects and advantages of the embodiments of the present application will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, in which:

FIG. 1 is a schematic plan view of a terminal according to some embodiments of the present application.

FIG. 2 is a schematic plan view from another perspective of the terminal according to some embodiments of the present application.

Fig. 3 is a schematic structural diagram of an imaging system according to some embodiments of the present application.

FIG. 4 is a three-dimensional exploded schematic diagram of an image sensor according to some embodiments of the present application.

FIG. 5 is a three-dimensional schematic diagram of a microlens, a microstructure group, and a pixel group in an image sensor according to some embodiments of the present application.

FIG. 6 is a schematic diagram of the offset of the microlens and the microstructure group of the sub-photosensitive surface of the image sensor according to some embodiments of the present application.

FIG. 7 is a three-dimensional schematic diagram of a pixel array according to some embodiments of the present application.

Fig. 8 is a schematic plan view of an imaging system according to some embodiments of the present application.

FIG. 9 is a schematic plan view of a sub-photosensitive surface in the image sensor of FIG. 8.

FIG. 10 is a schematic plan view of an imaging system according to some embodiments of the present application.

FIG. 11 is a schematic diagram of the field of view of the lens group according to some embodiments of the present application.

Figures 12 and 13 are three-dimensional assembly diagrams of imaging systems according to certain embodiments of the present application.

FIG. 14 is a schematic flowchart of an image acquisition method according to some embodiments of the present application.

15a and 15b are schematic diagrams of the principle of image acquisition methods in some embodiments of the present application.

FIG. 16 is a schematic plan view of an imaging system according to some embodiments of the present application.

FIG. 17 is a schematic flowchart of an image acquisition method according to some embodiments of the present application.

18a and 18b are schematic diagrams of the principle of image acquisition methods in some embodiments of the present application.

19 and 20 are schematic flowcharts of image acquisition methods in some embodiments of the present application.

detailed description

The implementation of the present application will be further described below in conjunction with the accompanying drawings. The same or similar reference numerals in the drawings indicate the same or similar elements or elements with the same or similar functions throughout.

In addition, the implementation manners of the present application described below in conjunction with the drawings are exemplary, and are only used to explain the implementation manners of the application, and should not be construed as limiting the application.

In this application, unless expressly stipulated and defined otherwise, the first feature “on” or “under” the second feature may be in direct contact with the first and second features, or the first and second features may be indirectly through an intermediary. contact. Moreover, the "above", "above" and "above" of the first feature on the second feature may mean that the first feature is directly above or diagonally above the second feature, or it simply means that the level of the first feature is higher than the second feature. The “below”, “below” and “below” of the second feature of the first feature may be that the first feature is directly below or obliquely below the second feature, or it simply means that the level of the first feature is smaller than the second feature.

Please refer to FIG. 4 and FIG. 5, the image sensor 10 according to the embodiment of the present application includes a metalenses 16 and a pixel array 13. The pixel array 13 is located on the light exit side 166 of the hyper lens 16, and the hyper lens 16 is used to split the incident light L from the light entrance side 165 of the hyper lens 16 to form a variety of exit light L'with different wavelengths. The emitted light L′ is emitted from the light emitting side 166 toward the pixel array 13 at different emission angles.

Please refer to FIG. 4. In some embodiments, the super lens 16 includes a lens body 161 and a microstructure array 162. The lens body 161 includes a light incident surface 163 located on the light incident side 165 of the super lens 16 and a light output surface 164 located on the light output side 166 of the super lens 16. The microstructure array 162 is arranged on the incident surface 163.

Please refer to FIG. 4, in some embodiments, the microstructure array 162 includes a plurality of microstructure groups 1621. The microstructure group 1621 includes a plurality of microstructure units 1622. The pixel array 13 includes a plurality of pixel groups 132, and the pixel groups 132 and the microstructure groups 1621 correspond one to one.

Referring to FIG. 5, in some embodiments, the shape, size, arrangement, and angle of the multiple microstructure units 1622 of the microstructure group 1621 are determined according to the wavelength and the exit angle of the emitted light L'.

Referring to FIG. 5, in some embodiments, the pixel group 132 includes a first pixel 1311, a second pixel 1312, a third pixel 1313, and a fourth pixel 1314. A variety of emitted light with different wavelengths includes red light, first green light Light, second green light and blue light, the first pixel 1311 is used to receive red light, the second pixel 1312 is used to receive the first green light, the third pixel 1313 is used to receive blue light, and the fourth pixel 1314 is used to receive the second green light. Light.

Referring to FIG. 5, in some embodiments, the pixel group 132 includes a first pixel 1311, a second pixel 1312, a third pixel 1313, and a fourth pixel 1314, and multiple emitted lights with different wavelengths include red light and first yellow light. Light, second yellow light and blue light, the first pixel 1311 is used to receive red light, the second pixel 1312 is used to receive the first yellow light, the third pixel 1313 is used to receive blue light, and the fourth pixel 1314 is used to receive the second yellow light. Light.

Please refer to FIG. 4, in some embodiments, the image sensor 10 includes a microlens array 12, and the microlens array 12 is disposed on the light incident side 165. The microlens array 12 includes a plurality of microlenses 121. The pixel group 132, the microstructure group 1621, and the microlens 121 correspond one to one.

6-8, in some embodiments, the image sensor 10 includes a photosensitive surface 11 located on the imaging surface S1, the photosensitive surface 11 includes a plurality of sub-sensing surfaces 111, on each sub-sensing surface 111, the sub-sensing surface The microlens 121 corresponding to the center position of the surface 111 is aligned with the microstructure group 1621, while the microlens 121 and the microstructure group 1621 corresponding to the non-central position are offset from each other.

Referring to FIGS. 6 to 8, in some embodiments, a plurality of circles with a center as the center are all located in non-central positions. As the radius of the circle where the microlens 121 is located gradually increases, the microlens 121 and the corresponding The offset of the microstructure group 1621 also gradually increases.

Please refer to FIGS. 3 to 5, the imaging system 100 of the embodiment of the present application includes an image sensor 10 and a lens group 20. The image sensor 10 is provided on the image side of the lens group 20. The image sensor 10 includes a super lens 16 (metelenses) and a pixel array 13. The pixel array 13 is located on the light exit side 166 of the hyper lens 16, and the hyper lens 16 is used to split the incident light L from the light entrance side 165 of the hyper lens 16 to form a variety of exit light L'with different wavelengths. The emitted light L′ is emitted from the light emitting side 166 toward the pixel array 13 at different emission angles.

3 and 5, in some embodiments, the image sensor 10 includes a photosensitive surface 11 located on the imaging surface S1, the lens group 20 includes multiple groups of lenses 21, each group of lenses 21 on the imaging surface S1 corresponding imaging The area 215 covers a part of the photosensitive surface 11, and the imaging area 215 corresponding to the multiple lenses 21 on the imaging surface S1 collectively covers all the photosensitive surface 11.

1 and 2, the terminal 1000 of the embodiment of the present application includes a housing 200 and the imaging system 100 of the above-mentioned embodiment. The imaging system 100 is installed on the housing 200.

Referring to FIG. 1 and FIG. 2, the terminal 1000 in the embodiment of the present application includes a housing 200 and an imaging system 100. The imaging system 100 is installed on the housing 200.

Please refer to FIG. 3, the imaging system 100 includes an image sensor 10 and a lens group 20. The image sensor 10 is provided on the image side of the lens group 20.

As the light passes through each CFA, only one color of light passes through, and the other light is filtered and lost, so the light utilization rate is low.

In the image sensor 10 according to the embodiment of the present application, the super lens 16 divides the incident light L from the light entrance side 165 into a plurality of outgoing light rays L'of different wavelengths, and the outgoing light rays L'of different wavelengths are emitted at different exit angles. To image the pixel array 13, the light is not filtered, almost no loss, and the light utilization rate is high.

Please refer to Figure 1 and Figure 2. More specifically, the terminal 1000 may be a mobile phone, a tablet computer, a monitor, a notebook computer, a teller machine, a gate, a smart watch, a head-mounted display device, a game console, and the like. The embodiments of this application are described by taking the terminal 1000 as a mobile phone as an example. It can be understood that the specific form of the terminal 1000 is not limited to a mobile phone.

The housing 200 can be used to install the imaging system 100, or in other words, the housing 200 can be used as an installation carrier of the imaging system 100. The terminal 1000 includes a front 901 and a back 902. The imaging system 100 can be set on the front 901 as a front camera, and the imaging system 100 can also be set on the back 902 as a rear camera. In the embodiment of the application, the imaging system 100 is set on the back 902 as a rear camera. rear camera. The housing 200 can also be used to install functional modules such as the imaging system 100, power supply device, and communication device of the terminal 1000, so that the housing 200 provides protections such as dustproof, anti-drop, and waterproof for the functional modules.

Please refer to FIG. 3. More specifically, the image sensor 10 includes a photosensitive surface 11, a micro lens array 12, a super lens 16 and a pixel array 13. The photosensitive surface 11 is located on the imaging surface S1.

The photosensitive surface 11 is rectangular. The photosensitive surface 11 includes a plurality of sub photosensitive surfaces 111. For example, the photosensitive surface 11 includes one sub photosensitive surface 111, two sub photosensitive surfaces 111, three sub photosensitive surfaces 111, four sub photosensitive surfaces 111, or even more sub photosensitive surfaces 111. In this embodiment, the photosensitive surface 11 includes four sub-photosensitive surfaces 111, the four sub-photosensitive surfaces 111 are all rectangular, the lengths of the four rectangles are the same, and the widths of the four rectangles are the same. In other embodiments, the four sub-photosensitive surfaces 111 may all be circular, diamond-shaped, etc., or the four sub-photosensitive surfaces 111 may be partially rectangular, and partially circular, diamond-shaped, or the like. The sizes of the four sub-photosensitive surfaces 111 may also be different from each other, or two of them are the same, or three of them are the same.

Referring to FIGS. 3 to 5, the micro lens array 12 is located on the photosensitive surface 11, and the micro lens array 12 is located between the lens group 20 and the super lens 16, and the micro lens array 12 is located on the light incident side 165 of the super lens 16. The microlens array 12 includes a plurality of microlenses 121. The micro lens 121 may be a convex lens for condensing the light emitted from the lens group 20 to the micro lens 121 so that more light is irradiated on the super lens 16.

The hyper lens 16 is located between the micro lens array 12 and the pixel array 13. The super lens 16 includes a lens body 161 and a microstructure array 162.

The lens body 161 includes a light incident surface 163 located on the light incident side 165 of the super lens 16 and a light output surface 164 located on the light output side 166 of the super lens 16. Among them, the light entrance side 165 is the side of the super lens 16 opposite to the micro lens array 12, and the light exit side 166 is the side of the super lens 16 opposite to the micro lens array 12.

The lens body 161 can be made of materials with high light transmittance. For example, the lens body 161 can be made of plastic or glass with high light transmittance (transmittance greater than 90%). The lens body 161 can be used as a carrier of the microstructure array 162, and the light entering from the light incident side 165 passes through the lens body 161 without loss, which is beneficial to improve the light utilization efficiency.

The microstructure array 162 is arranged on the incident surface 163. The microstructure array 162 includes a plurality of microstructure groups 1621. The microstructure group 1621 corresponds to the microlens 121. For example, the microstructure group 1621 corresponds to one microlens 121, or the microstructure group 1621 corresponds to two microlenses 121, or the microstructure group 1621 corresponds to three microlenses 121, or the microstructure group 1621 corresponds to four microlenses. The micro-lens 121 corresponds, etc. The micro-structure group 1621 can also correspond to more (more than 4) micro-lenses 121, which will not be listed here. In the embodiment of the present application, the microstructure group 1621 corresponds to one microlens 121.

The microstructure group 1621 includes a plurality of microstructure units 1622. The shape, size, arrangement and angle of the plurality of microstructure units 1622 are determined according to the wavelength and the exit angle of the emitted light L'. The shape of the microstructure unit 1622 may be a rectangular parallelepiped, a cube, a cylinder, or even other irregular shapes (such as a rectangular parallelepiped with a portion of which is cut off). In the embodiment of the present application, the microstructure unit 1622 is a rectangular parallelepiped. The size of the microstructure units 1622 may be the same or different. For example, in a microstructure group 1621, the sizes of multiple microstructure units 1622 are all the same, or the multiple microstructure units 1622 are divided into multiple parts (for example, two parts, Three parts, etc.), the size of the microstructure unit 1622 in each part is the same, and the size of the microstructure unit 1622 in different parts is different. In the embodiment of the present application, the size of the microstructure unit 1622 in each microstructure group 1621 is the same. The arrangement of the microstructure units 1622 in each microstructure group 1621 can be arranged in a regular pattern (such as rectangular, circular, "L"-shaped, "T-shaped", etc.), or in an irregular pattern (such as intercepted Part of the rectangle, circle, etc.). The angle of the plurality of microstructure units 1622 refers to the included angle between the microstructure unit 1622 and the incident surface 163, and the included angle can be any angle in the interval [0 degree, 90 degrees]. In the embodiment of the present application, the angle between the microstructure unit 1622 in each microstructure group 1621 and the incident surface 163 is 90 degrees, that is, the long side of the rectangular parallelepiped microstructure unit 1622 and the incident surface The angle between 163 is 90 degrees.

The microstructure units 1622 of each microstructure group 1621 have the same shape, size, arrangement, and angle. The microstructure unit 1622 is formed of nano-scale titanium dioxide, so that the microstructure unit 1622 can achieve high smoothness and precise ratio of length to width, which is beneficial for the microstructure group 1621 to accurately divide the incident light L into multiple beams of outgoing light L of different wavelengths. '.

The super lens 16 (specifically, the microstructure group 1621) is used to split the incident light L from the light incident side 165 to form a variety of outgoing rays L'with different wavelengths, and the outgoing rays L'with different wavelengths are emitted in different ways The angle is emitted from the light exit side 166 toward the pixel array 13. In an example, the incident light L after passing through the microstructure array 162 is divided into a plurality of outgoing light rays L'of different wavelengths, which are red light R, first green light G1, second green light G2, and blue light B, respectively. The wavelengths of the first green light G1 and the second green light G2 may be the same or different.

Please refer to FIG. 4 and FIG. 5, the pixel array 13 is located on the light exit side 166 of the super lens 16. The pixel array 13 includes a plurality of pixel groups 132, and the pixel groups 132, the microstructure groups 1621 and the microlenses 121 are arranged in a one-to-one correspondence.

Specifically, each pixel group 132 includes four pixels 131 (respectively the first pixel 1311, the second pixel 1312, the third pixel 1313, and the fourth pixel 1314), and each microstructure group 165 will pass through the microstructure group 165. The incident light L is divided into four different wavelengths of outgoing light L'(including red light R, first green light G1, blue light B, and second green light G2), red light R, first green light G1, blue light B, and second green light G2. The two green lights G2 respectively enter the first pixel 1311, the second pixel 1312, the third pixel 1313, and the fourth pixel 1314 in the corresponding pixel group 132 for photoelectric conversion. Among them, the red light R can include part or all of the light within the wavelength range [622 nanometers (nm), 770nm], the first green light R1 can include part or all of the light within the wavelength range [492nm, 500nm], and the second The green light R2 may include part or all of the light having a wavelength in the range (500nm, 577nm), and the blue light B may include some or all of the light having a wavelength in the range of [455nm, 492nm). In other embodiments, each microstructure group 165 divides the incident light L passing through the microstructure group 165 into four types of outgoing light L′ with different wavelengths (including red light R, first yellow light Y1, blue light B, and second light). Yellow light Y2), the red light R, the first yellow light Y1, the blue light B, and the second yellow light Y2 respectively enter the first pixel 1311, the second pixel 1312, the third pixel 1313, and the fourth pixel in the corresponding pixel group 132. The pixel 1314 performs photoelectric conversion. Among them, the red light R may include part or all of the light within the wavelength range [622nm, 770nm], the first yellow light Y1 may include part or all of the light within the wavelength range [577nm, 580nm], and the second yellow light Y2 may Including part or all of the light within the wavelength range (580nm, 597nm], the blue light B may include part or all of the light within the wavelength interval [455nm, 492nm].

At this time, there is no need to provide a filter between the microlens array 12 and the pixel array 13. Compared with the traditional imaging system, the filter is used to filter and absorb the light, so that the light of the corresponding wavelength enters the corresponding In terms of pixels, the super lens 16 is used to replace the role of the filter. The light is not filtered and absorbed but is directly divided by the microstructure group 1621 into multiple outgoing light beams of different wavelengths and shoots L'to the corresponding pixel 131. There is almost no light. Loss, the light utilization rate is higher. Moreover, the microlens 121 does not need to be set in a one-to-one correspondence between the microlens and the pixels as in the traditional image sensor, and then the microlens 121 is used to converge the light into the corresponding pixel, but only the microlens 121 is required to converge the light. The light is emitted to the corresponding microstructure group 1621, and then the light is divided into light of different wavelengths by the corresponding microstructure group 1621 and then directed to the corresponding pixel 131. Since the light is not lost by filtering, fewer microlenses 121 are used. The amount of light received by the pixel array 13 can also meet the shooting requirements, and the manufacturing requirements and costs of the microlens array 121 can be reduced. In other embodiments, the size of the microlens 121 may be larger than the size of the microlens in a conventional image sensor, so that the microlens 121 can condense more light to the microstructure group 1621, thereby increasing the amount of light reaching the pixel array 13 .

Referring to FIG. 6, on each sub-photosensitive surface 111, the microlens 121 corresponding to the center position of the sub-photosensitive surface 111 is aligned with the microstructure group 1621, while the microlens 121 and the microstructure group 1621 corresponding to the non-central position are offset from each other. shift. Specifically, the center position of the sub-photosensitive surface 111 is the intersection of the diagonal lines of the rectangle. The center position is the center, and the multiple circles whose radius is greater than 0 and less than half of the diagonal length are all located in non-central positions. The offset of the microstructure group 1621 and the corresponding microlens 121 distributed on the circle is the same, and the offset of the microstructure group 1621 and the corresponding microlens 121 is positively correlated with the size of the radius. The offset refers to the distance between the center of the orthographic projection of the microlens 121 on the microstructure array 16 and the center of the corresponding microstructure group 1621.

Specifically, the offset between the microlens 121 and the corresponding pixel 131 is positively correlated with the radius of the circle where the microlens 121 is located. This means that as the radius of the circle where the microlens 121 is located gradually increases, the microlens 121 and the corresponding The offset of the microstructure group 1621 also gradually increases. For example, the radii of the three circles r1, r2, and r3 gradually increase, and the offsets of the microlenses 121 and the corresponding microstructure group 1621 distributed on the circumferences of r1, r2, and r3 are X1, X2, and X3, respectively. X1<X2<X3.

In this way, when the microlens 121 and the microstructure group 1621 are completely aligned without shifting, for a sub-photosensitive surface 111, part of the light condensed by the microlens 121 at the edge position cannot be received by the corresponding microstructure group 1621 , Resulting in a waste of light. In the image sensor 10 of the embodiment of the present application, a reasonable offset is set for the microlens 121 corresponding to the non-central position and the corresponding microstructure group 1621, which can improve the convergence effect of the microlens 121, so that the light received by the microlens 121 is condensed All of them can be received by the corresponding microstructure group 1621.

Please refer to FIG. 7 and FIG. 4, the shading member 14 is formed at the junction of the two sub-photosensitive surfaces 111. Specifically, the light-shielding member 14 may be arranged at the junction of the two sub-photosensitive surfaces 111 by gluing or the like. The shading member 14 may be made of a opaque material, and the shading member 14 may also be made of a material that can absorb light.

Please refer to FIG. 3 again, the lens group 20 includes a multi-group lens 21. For example, the lens group 20 includes one group of lenses 21, two groups of lenses 21, three groups of lenses 21, four groups of lenses 21, even more groups of lenses 21, and the like. The lens group 20 of the embodiment of the present application includes four groups of lenses 21.

Referring to FIG. 8, the imaging area 215 corresponding to each group of lenses 21 on the imaging surface S1 partially covers the photosensitive surface 11. Wherein, the imaging area 215 corresponding to each group of lenses 21 on the imaging surface S1 refers to the coverage area of the light rays emitted after passing through the group of lenses 21 on the imaging surface S1. Specifically, the corresponding imaging area 215 of each group of lenses 21 on the imaging surface S1 covers at least one corresponding sub-photosensitive surface 111. The imaging area 215 of the four groups of lenses 21 collectively covers all the photosensitive surfaces 11, that is to say, the photosensitive surface 11 is located in the range jointly covered by the imaging areas 215 of the four groups of lenses 21. For example, the first imaging area 2151 corresponding to the first group lens 211 on the imaging surface S1 covers the first sub-photosensitive surface 1111, and the second imaging area 2152 corresponding to the second group lens 212 on the imaging surface S1 covers the second sub-photosensitive surface 1112, the third imaging area 2153 corresponding to the third group lens 213 on the imaging surface S1 covers the third sub-photosensitive surface 1113, and the fourth imaging area 2154 corresponding to the fourth group lens 214 on the imaging surface S1 covers the fourth sub-photosensitive surface 1114, so that the first imaging area 2151, the second imaging area 2152, the third imaging area 2153, and the fourth imaging area 2154 collectively cover the entire photosensitive surface 11.

Each lens group 21 may include one or more lenses. For example, each group of lenses 21 may include one lens, which may be a convex lens or a concave lens; for another example, each group of lenses 21 may include multiple lenses (more than and equal to two), and the multiple lenses are sequentially along the optical axis O'direction. Arrangement, multiple lenses can all be convex lenses or concave lenses, or part of convex lenses and part of concave lenses. In this embodiment, each group of lenses 21 includes one lens. The imaging area 215 corresponding to each group of lenses 21 on the imaging surface S1 may be circular, rectangular, rhombus, etc. In the embodiment of the present application, each group of lenses 21 adopts an aspheric lens, and the imaging area 215 is circular. The circular imaging area 215 is exactly the circumscribed circle of the rectangular sub-photosensitive surface 111. In the area of the circular imaging area 215 that does not overlap with the rectangular sub-photosensitive surface 111, a part of the corresponding light does not enter the range of the photosensitive surface 11, and the other part of the corresponding light is blocked and absorbed by the shading member 14. It cannot be directed into the adjacent sub-photosensitive surfaces 111, thereby preventing the light rays from different groups of lenses 21 from interfering with each other.

Please refer to FIGS. 8 and 9, taking the first sub-photosensitive surface 1111 and the corresponding first imaging area 2151 as an example for description. As shown in FIG. 9, the light corresponding to the area 2155 in FIG. 9 does not enter the first sub-photosensitive surface. Within the range of the surface 1111, it does not fall within the range of the photosensitive surface 11, and cannot be received by the pixels 131 corresponding to the photosensitive surface 11 for imaging. The light corresponding to the area 2156 in FIG. 9 will be blocked and absorbed by the shading member 14, and cannot enter the adjacent second sub-sensing surface 1112 and the fourth sub-sensing surface 1114, that is, the first The light of the lens group 211 cannot affect the imaging of the pixels 131 corresponding to the second sub-photosensitive surface 1112 and the imaging of the pixels 131 corresponding to the fourth sub-photosensitive surface 1114. Similarly, the light from the second lens group 212 cannot affect the imaging of the pixels 131 corresponding to the first sub-photoreceptive surface 1111 and the image formation of the pixels 131 corresponding to the third sub-photoreceptive surface 1113. The light from the third lens group 213 cannot affect the The imaging of the pixels 131 corresponding to the second photosensitive surface 1112 and the imaging of the pixels 131 corresponding to the fourth sub-sensing surface 1114. The light of the fourth lens group 214 cannot affect the imaging and the first imaging of the pixels 131 corresponding to the third sub-sensing surface 1113. The imaging of the pixels 131 corresponding to the sub-photosensitive surface 1114 is such that the light passing through the first group of lenses 211, the second group of lenses 212, the third group of lenses 213, and the fourth group of lenses 214 does not affect each other, thereby ensuring the accuracy of imaging.

In other embodiments, at least one surface of at least one lens in each group of lenses 21 is a free-form surface. It can be understood that the aspheric lens has only one axis of symmetry due to its rotationally symmetric design, so its corresponding imaging area 215 is generally circular. The lens 21 including a free-form surface is a non-rotationally symmetrical design, including multiple symmetry axes. The design of the imaging area 215 is not restricted by a circle, and can be designed into a rectangle, a rhombus, or even an irregular shape (such as a "D" shape). )Wait. The imaging area 215 corresponding to each group of lenses 21 of the present application is rectangular, and has the same rectangular size as the corresponding sub-photosensitive surface 111. At this time, there is no need to provide the shading member 14 and the light between different groups of lenses 21 will not interfere with each other.

3 and 10, the optical axis O of each lens group 21 is inclined with respect to the photosensitive surface 11, and the optical axis O of the multi-group lens 21 is on the object side of the lens group 20 (that is, the lens group 20 is opposite to the photosensitive surface 11). Side) converge. Specifically, the optical axis O of each group of lenses 21 may intersect a central axis O'perpendicular to the photosensitive surface 11 and passing through the center of the photosensitive surface 11, and intersect on the object side. The included angle α between the optical axis O and the central axis O'of each group of lenses 21 is any angle between the interval (0 degrees, 15 degrees), for example, the included angle α is 1 degree, 2 degrees, 3 degrees, 5 degrees, 7 degrees. Degrees, 10 degrees, 13 degrees, 15 degrees, etc. The angle α of different groups of lenses 21 may be the same or different. For example, the first group of lenses 211, the second group of lenses 212, the third group of lenses 213, and the fourth group of lenses The included angle α of 214 is the same, all being 10 degrees; or, the included angle α of the first group lens 211, the second group lens 212, the third group lens 213, and the fourth group lens 214 are all different, being 5 degrees and 7 degrees respectively. Degrees, 10 degrees, and 13 degrees; or, the angle α between the first group lens 211 and the second group lens 212 is the same as α1, and the angle α between the third group lens 213 and the fourth group lens 214 is the same as α2, α1 is not equal to α2, such as α1=10 degrees, α2=13 degrees; etc., which will not be listed here. The optical axis O of each lens group 21 is located on the diagonal of the corresponding sub-photosensitive surface 111 and the central axis O' In the plane where the lens is located, specifically, the projection of the optical axis O of each group of lenses 21 on the photosensitive surface 11 is located on the diagonal of the corresponding sub-photosensitive surface 111.

In other embodiments, the optical axis O of each lens group 21 is inclined with respect to the photosensitive surface 11, and the optical axis O of the multi-group lens 21 converges on the image side of the lens group 20. Specifically, the optical axis O of each group of lenses 21 intersects a central axis O'perpendicular to the photosensitive surface 11 and passing through the center of the photosensitive surface 11, and intersects on the image side. The included angle α between the optical axis O and the central axis O'of each group of lenses 21 is any angle between the interval (0 degrees, 15 degrees), for example, the included angle α is 1 degree, 2 degrees, 3 degrees, 5 degrees, 7 degrees. Degrees, 10 degrees, 13 degrees, 15 degrees, etc. The optical axis O of each group of lenses 21 is located in the plane where the diagonal of the corresponding sub-photosensitive surface 111 and the central axis O'are located, specifically, the light of each group of lenses 21 The projection of the axis O on the photosensitive surface 11 is located on the diagonal of the corresponding sub-photosensitive surface 111.

The field of view FOV of each lens group 21 is any angle in the interval [60 degrees, 80 degrees], for example, the field of view FOV is 60 degrees, 62 degrees, 65 degrees, 68 degrees, 70 degrees, 75 degrees, 78 degrees, 80 degrees and so on. The angle of view FOV of the lenses 21 of different groups may be the same or different. For example, the FOV of the first group lens 211, the second group lens 212, the third group lens 213, and the fourth group lens 214 are the same, 60 degrees; or, the first group lens 211, the second group lens 212 , The FOV of the third group lens 213 and the fourth group lens 214 are different, respectively 60 degrees, 65 degrees, 70 degrees and 75 degrees; or the first group lens 211, the second group lens 212 field of view The angle FOV is the same as α1, and the angle α between the third lens group 213 and the fourth lens group 214 is the same as α2, and α1 is not equal to α2, such as α1=60 degrees, α2=75 degrees; One enumerate.

The field of view range of the multi-group lens 21 sequentially forms a blind area range a0, a first field of view distance a1, and a second field of view distance a2. The blind zone range a0, the first field of view distance a1, and the second field of view distance a2 are all distance ranges from the optical center plane S2, and the optical centers of the multiple lenses 21 are all on the optical center plane S2. Among them, the blind zone range a0 is the distance range where the field of view of the multi-lens 21 does not overlap the area. The blind zone a0 is based on the FOV of the multi-lens 21 and the clamp between the optical axis O and the central axis O'of the multi-lens 21 The angle α is determined. For example, if the FOV of the multi-group lens 21 remains unchanged, the blind zone range a0 is negatively correlated with the angle α between the optical axis O of the multi-group lens 21 and the central axis O'; for another example, the multi-group lens 21 The included angle α between the optical axis O and the central axis O′ of the optical axis is unchanged, and the blind zone range a0 is negatively correlated with the field angle FOV of the multi-lens 21. In the embodiment of the present application, the angle α between the optical axis O and the central axis O'of each group of lenses 21 is any angle between the interval (0 degrees, 15 degrees), and the blind zone range a0 is relatively small. Among them, the blind zone range a0 is [1mm, 7mm], the first field of view distance a1 is the interval (7mm, 400mm], and the second field of view distance a2 is the interval (400mm, +∞).

The first field of view distance a1 is located between the blind zone range a0 and the second field of view distance a2. As the distance from the optical center plane S2 increases, within the first field of view distance a1, the combined field of view of the multiple lenses 21 The overlap area in the field range gradually increases, and then reaches the maximum when it reaches the intersection of the second field of view distance a2 and the first field of view distance a1 (the overlap area accounts for 100% of the total composite field of view range); Within the field of view distance a2, in the direction from the lens 21 to the object side, the proportion of the overlapping area in the combined field of view of the multi-lens 21 to the entire combined field of view gradually decreases, and then reaches a value at infinity. The limit value, the combined field of view of the imaging system 100 of the present application at infinity is shown in FIG. 11, and the overlap area 711 is the overlap portion of the field of view 71 of the four groups of lenses 21. The present application limits the range of the field of view of each group of lenses 21. The angle of view FOV and the angle α between the optical axis O and the central axis O'of each group of lenses 21 make the overlap area 711 at infinity occupies the entire synthetic field of view (the field of view of the four groups of lenses 21 jointly cover The ratio of the range) is greater than 25%, which can ensure that the image in the overlapping area 711 has sufficient sharpness.

Referring to FIGS. 7 and 8 again, in some embodiments, the shading member 14 can also be used as an extension of the image sensor 10 and integrally formed with the image sensor 10. The shading member 14 is also provided with a microlens array 12 and a super lens 16 And the pixel array 13, so that the shading member 14 can receive light for imaging.

Referring to FIG. 8, specifically, the light from each group of lenses 21 to the sub-photosensitive surface 111 corresponding to the adjacent two groups of lenses 21 (that is, the light in the area 2156 in the imaging area 215) can be received by the shading member 14 For imaging, for example, the light emitted by the first lens group 211 toward the second sub-photosensitive surface 1112 and the fourth sub-photosensitive surface 1114 can be received by the shading member 14, and the second lens group 212 shoots toward the first sub-photosensitive surface 1111 and the third sub-surface 1111. The light from the photosensitive surface 1113 can be received by the shading member 14. The light from the third lens group 213 directed to the second sub-photosensitive surface 1112 and the fourth sub-photosensitive surface 1114 can be received by the shading member 14, and the fourth lens group 214 is directed toward the first The light from the sub-photosensitive surface 1111 and the third sub-photosensitive surface 1113 can be received by the shading member 14. Compared with the shading member 14 only shielding and absorbing the light in the area 2156, resulting in image loss in the area 2156, the light in the imaging area 215 of each group of lenses 21 located in the area 2156 is received by the shading member 14 for imaging. The image loss is small.

Please refer to FIG. 12, in some embodiments, the imaging system 100 may further include a substrate 30 and a lens holder 40.

The substrate 30 may be a flexible circuit board, a rigid circuit board, or a rigid-flex circuit board. In the embodiment of the present application, the substrate 30 is a flexible circuit board, which is convenient for installation. The substrate 30 includes a carrying surface 31.

The lens holder 40 is arranged on the bearing surface 31. The lens holder 40 can be installed on the carrying surface 31 by gluing or the like. The lens holder 40 includes a lens holder 41 and a plurality of lens barrels 42 provided on the lens holder 41. The image sensor 10 (shown in FIG. 4) is arranged on the carrying surface 31 and is housed in the lens holder 41. The number of lens barrels 42 may be one, two, three, four, or even more. In this embodiment, the number of lens barrels 42 is four. The four lens barrels 42 are arranged at independent intervals and are used to install four groups of lenses 21. Each group of lenses 21 is installed in the corresponding lens barrel 42. On the one hand, it is easy to Installation, and the manufacturing process of the lens 21 does not need to be changed, and the traditional lens manufacturing process can still be used; on the other hand, when imaging, the light converged by each group of lenses 21 can be blocked by the corresponding lens barrel 42 first to avoid mutual crosstalk. Light affects imaging. Please refer to FIG. 13, in other embodiments, the number of the lens barrel 42 is one, and the four groups of lenses 21 are installed in the same lens barrel 42 at the same time. At this time, the four groups of lenses 21 can be separately manufactured and molded and installed in Inside the one lens barrel 42. The four groups of lenses 21 can also be integrally formed and installed in the one lens barrel 42. At this time, the four groups of lenses 21 are installed in the same lens barrel 42 at the same time. On the one hand, the manufacturing process of the lens barrel 42 does not need to be changed. The traditional lens barrel manufacturing process can be used; on the other hand, the positional relationship between the four groups of lenses 21 is precisely determined by the mold when the lens 21 is manufactured, and the four lenses 21 are installed in the four lens barrels 42 respectively. In other words, it can be avoided that the positional relationship between the four groups of lenses 21 does not meet the requirements due to installation errors.

Referring to FIGS. 3, 5, 14, 15a and 15b, the image acquisition method of the embodiment of the present application can be applied to the imaging system 100 of any embodiment of the present application. Specifically, the imaging system 100 includes an image sensor 10 and The lens group 20, the image sensor 10 includes a photosensitive surface 11 located on the imaging surface S1, the image sensor 10 includes a super lens 16 and a pixel array 13, the pixel array 13 is located on the light exit side 166 of the super lens 16, and the super lens 16 is used to contrast the super lens 16 The incident light L that enters the light incident side 165 of the lens 16 is split to form a variety of outgoing rays L'with different wavelengths, and the outgoing rays L'of different wavelengths are emitted from the light emitting side 166 to the pixel array 13 at different exit angles. Photoelectric conversion. The photosensitive surface 11 includes a plurality of sub-photosensitive surfaces 111, and the lens group 20 includes multiple groups of lenses 21. The imaging area 215 corresponding to each group of lenses 21 on the imaging surface S1 covers part of the photosensitive surface 11. The multiple groups of lenses 21 correspond to the imaging surface S1. The imaging area 215 covers all the photosensitive surfaces 11 together, and at least one surface of each group of lenses 21 is a free-form surface, so that the corresponding imaging area 215 of each group of lenses 21 on the imaging surface S1 is rectangular. Image acquisition methods include:

01: Expose the pixels 131 (shown in FIG. 4) corresponding to the multiple sub-photosensitive surfaces 111 to obtain multiple initial images P0; and

02: Process multiple initial images P0 to obtain a final image P2.

Specifically, the imaging system 100 may further include a processor 60 (shown in FIG. 1 ), and the processor 60 is connected to the image sensor 10. All the pixels 131 on the image sensor 10 can be individually exposed. The processor 60 can control all the pixels 131 of the image sensor 10 to be exposed at the same time to obtain the first initial sub-surface 1111, the second sub-sensing surface 1112, the third sub-sensing surface 1113, and the fourth sub-sensing surface 1114 respectively. Image P01, second initial image P02, third initial image P03, and fourth initial image P04.

Referring to FIG. 15a, taking T as an exposure period, in one exposure period, the pixels 131 corresponding to the first sub-sensing surface 1111, the second sub-sensing surface 1112, the third sub-sensing surface 1113, and the fourth sub-sensing surface 1114 are all Complete exposure. For example, the first sub-sensing surface 1111, the second sub-sensing surface 1112, the third sub-sensing surface 1113, and the fourth sub-sensing surface 1114 have the same exposure time for the pixels 131 corresponding to T, then the first sub-sensing surface 1111, the The pixels 131 corresponding to the second sub-photosensitive surface 1112, the third sub-photosensitive surface 1113, and the fourth sub-photosensitive surface 1114 can start exposure at the same time and stop exposure at the same time; or, the first sub-photosensitive surface 1111, the second sub-photosensitive surface 1112, and the second sub-photosensitive surface 1112. The exposure durations of the pixels 131 corresponding to the three sub-photosensitive surfaces 1113 and the fourth sub-photosensitive surface 1114 are different, which are 1/4T, 1/2T, 3/4T, and T, respectively. The processor 60 can control the first sub-photosensitive surface 1111. The pixels 131 corresponding to the second sub-sensing surface 1112, the third sub-sensing surface 1113, and the fourth sub-sensing surface 1114 start to be exposed at the same time. Because the exposure time is different, the time to end the exposure is also different. The first sub-sensing surface 1111 is at 1/ Exposure is stopped at 4T, the second sub-photosensitive surface 1112 stops at 1/2T, the third sub-photosensitive surface 1113 stops at 3/4T, and the fourth sub-photosensitive surface 1114 stops at T. In this way, after each sub-photosensitive surface 111 is exposed, a corresponding initial image P0 can be obtained. Among them, the first sub-photosensitive surface 1111, the second sub-photosensitive surface 1112, the third sub-photosensitive surface 1113, and the fourth sub-photosensitive surface 1114 are exposed to light. The first initial image P01, the second initial image P02, the third initial image P03, and the fourth initial image P04 are obtained respectively.

Alternatively, the processor 60 may control the pixels 131 corresponding to multiple regions of the image sensor 10 to be sequentially exposed, for example, sequentially exposing the first sub-sensing surface 1111, the second sub-sensing surface 1112, the third sub-sensing surface 1113, and the fourth sub-sensing surface. The pixel 131 corresponding to the surface 1114. Please refer to Figure 15a, taking T as an exposure period (within one exposure period, the four sub-photosensitive surfaces 111 are sequentially exposed) as an example. In [0,1/4T], the first sub-photosensitive surface 1111 corresponds to Expose all the pixels 131 in the first sub-photosensitive surface 1111 to obtain an initial image P0 (hereinafter referred to as the first initial image P01, the first initial image P01 includes 1, 2 in Figure 15a). 3 and 4), where the exposure start time of all pixels 131 corresponding to the first sub-photosensitive surface 1111 are the same, and the exposure end time is also the same, that is, all the corresponding pixels 131 in the first sub-photosensitive surface 1111 have the same The exposure time experienced by the pixels 131 are all the same, for example, 1/4T; or, the exposure start time of all the pixels 131 corresponding to the first sub-photosensitive surface 1111 may be different, but the exposure end time is the same, that is, the first sub-surface 1111 The exposure time experienced by all the pixels 131 corresponding to the photosensitive surface 1111 can be different, but at 1/4T, all the pixels 131 corresponding to the first sub-photosensitive surface 1111 need to be fully exposed, for example, the exposure time experienced by a part of the pixels 131 It is 1/4T, and the exposure time experienced by the remaining part of the pixels 131 is less than 1/4T, such as 1/5T, 1/6T, 1/7T, 1/8T, etc.

In (1/4T, 2/4T), all the pixels 131 corresponding to the second sub-photosensitive surface 1112 are exposed, and after all the pixels 131 corresponding to the second sub-photosensitive surface 1112 are exposed, an initial image P0 (hereinafter referred to as The second initial image P02, the second initial image P02 includes the four image areas of 5, 6, 7 and 8 in Figure 15a), the second initial image P02 is only based on the electricity generated by the (1/4T, 2/4T) internal exposure The signal is obtained. Among them, the exposure start time of all pixels 131 corresponding to the second sub-photosensitive surface 1112 are the same, and the exposure end time is also the same, that is, the exposure experienced by all the pixels 131 corresponding to the second sub-photosensitive surface 1112 The duration is the same, for example, 1/4T; or, the exposure start time of all the pixels 131 corresponding to the second sub-photosensitive surface 1112 may be different, but the exposure end time is the same, that is, the corresponding pixels in the second sub-photosensitive surface 1112 The exposure time experienced by all pixels 131 can be different, but at 2/4T, all the pixels 131 corresponding to the second sub-photosensitive surface 1112 need to be fully exposed. For example, the exposure time experienced by some pixels 131 is 1/4T, and the rest The exposure time experienced by some pixels 131 is less than 1/4T, such as 1/5T, 1/6T, 1/7T, 1/8T, etc.

In (2/4T, 3/4T), all the pixels 131 corresponding to the third sub-photosensitive surface 1113 are exposed, and all the pixels 131 corresponding to the third sub-photosensitive surface 1113 are exposed to obtain an initial image P0 (hereinafter referred to as The third initial image P03, the third initial image P03 includes the four image areas of 9, 10, 11 and 12 in Figure 15a), the third initial image P03 is only based on the electricity generated by the (2/4T, 3/4T) internal exposure The signal is obtained, where the exposure start time of all pixels 131 corresponding to the third sub-photosensitive surface 1113 are the same, and the exposure end time is also the same, that is, the exposure experienced by all the pixels 131 corresponding to the third sub-photosensitive surface 1113 The time length is the same, for example, 1/4T; or, the exposure start time of all the pixels 131 corresponding to the third sub-photosensitive surface 1113 may be different, but the exposure end time is the same, that is, corresponding to the third sub-photosensitive surface 1113 The exposure duration experienced by all pixels 131 can be different, but at 3/4T, all pixels 131 corresponding to the third sub-photosensitive surface 1113 need to be fully exposed. For example, the exposure duration experienced by some pixels 131 is 1/4T, and the remaining The exposure time experienced by some pixels 131 is less than 1/4T, such as 1/5T, 1/6T, 1/7T, 1/8T, etc.

In (3/4T, T), all the pixels 131 corresponding to the fourth sub-photosensitive surface 1114 are exposed, and all the pixels 131 corresponding to the fourth sub-photosensitive surface 1114 are exposed to obtain an initial image P0 (hereinafter referred to as the fourth The initial image P04, the fourth initial image P04 includes four

image areas

13, 14, 15 and 16 in Fig. 15a), the fourth initial image P04 is obtained only based on the electrical signal generated by the (3/4T, T] internal exposure, where , The exposure start time of all pixels 131 corresponding to the fourth sub-photosensitive surface 1114 are the same, and the exposure end time is also the same, that is, all the pixels 131 corresponding to the fourth sub-photosensitive surface 1114 have the same exposure time, For example, it is 1/4T; or, the exposure start time of all the pixels 131 corresponding to the fourth sub-photosensitive surface 1114 may be different, but the exposure end time is the same, that is, all the pixels 131 corresponding to the fourth sub-photosensitive surface 1114 are located The exposure time experienced can be different, but at 4/4T, all pixels 131 corresponding to the fourth sub-photosensitive surface 1114 need to be fully exposed. For example, the exposure time experienced by some pixels 131 is 1/4T, and the remaining pixels 131 The exposure time experienced is less than 1/4T, such as 1/5T, 1/6T, 1/7T, 1/8T, etc.

It can be understood that the light emitted from the central area of each group of lenses 21 is generally strong, while the light emitted from the edge area is relatively weak, because in order to prevent the central area from overexposing, the exposure time of a part of the pixels 131 corresponding to the central area is set to be relatively long. Small (such as 1/8), and the exposure time of another part of the pixels 131 corresponding to the edge area is set to 1/4, which can prevent a part of the pixels 131 corresponding to the central area from overexposing, but also prevent another part of the pixels corresponding to the edge area 131 insufficient exposure, thereby improving image quality. In this way, four initial images P0 (respectively the first initial image P01, the second initial image P02, the third initial image P03, and the fourth initial image P04) with better imaging quality can be obtained by sequentially exposing in one exposure period.

Referring to FIG. 15b, the processor 60 obtains the final image P2 according to the first initial image P01, the second initial image P02, the third initial image P03, and the fourth initial image P04. Please refer to FIG. 9, due to the overlapping area of the field of view of the four groups of lenses 21, as long as the object is outside the blind zone range a0, the first initial image P01, the second initial image P02, the third initial image P03, and the fourth initial image P04 will have an area with the same scene (ie, the overlapping area 711 in FIG. 9), and any adjacent two sets of lenses 21 will also have an area with the same scene (ie, the area 712 in FIG. 9). The processor 60 can identify the same scene area in the first initial image P01, the second initial image P02, the third initial image P03, and the fourth initial image P04 (hereinafter referred to as the first overlapping area M1, the image and the image of the first overlapping area M1) The coincidence area 711 in FIG. 9 corresponds), it can be understood that there are four first coincidence areas M1 (respectively the four areas 3, 8, 9 and 14 in FIG. 15a), and the four areas 3, 8, 9 and 14 respectively It corresponds to the first initial image P01, the second initial image P02, the third initial image P03, and the fourth initial image P04. Then the processor 60 only reserves the first overlap area M1 of any initial image P0 (for example, the first overlap area M1 of the first initial image P01, that is, area 3), and replaces the first overlap area M1 ( That is, areas 8, 9 and 14) are deleted.

Referring to FIG. 15a, the processor 60 recognizes areas of the same scene in two adjacent initial images P0 (hereinafter referred to as the second overlapping area M2, the second overlapping area M2 is obtained by only exposing the two adjacent sub-photosensitive surfaces 111). In the area with the same scene in the two initial images P0, the second overlapping area M2 corresponds to the area 712 in FIG. 9). It can be understood that each initial image P0 is adjacent to two initial images P0, so each initial image P0 corresponds to two second overlapping areas M2, that is, the number of second overlapping areas M2 is eight, where the first The second overlapping area M2 with the same scene in the initial image P01 and the second initial image P02 is area 2 and area 5, respectively, and the second overlapping area M2 with the same scene in the second initial image P02 and the third initial image P03 is area 7 respectively And area 10, the second overlapping area M2 with the same scene in the third initial image P03 and the fourth initial image P04 is area 12 and area 15, respectively, and the second overlapping area with the same scene in the fourth initial image P04 and the first initial image P01 Area M2 is area 13 and area 4, respectively.

Referring to FIG. 15b, since the scenes of the second overlapping area M2 of the two adjacent initial images P0 are the same, the processor 60 may retain any one of the second overlapping areas M2 of the two adjacent initial images P0 and delete The other one, for example, keep the second overlapping area M2 (ie, area 2) in the first initial image P01 that is the same scene as the second initial image P02, while deleting the second initial image P02 only has the same scene as the first initial image P01 The second overlapping area M2 (ie, area 5) of the second initial image P02 and the second overlapping area M2 (ie, area 7) with the same scene as the third initial image P03 in the second initial image P02 are retained, and the third initial image P03 is deleted only in the The second overlapping area M2 (ie, area 10) that is the same scene as the second initial image P02; the second overlapping area M2 (ie, area 12) that is the same scene as the fourth initial image P04 in the third initial image P03 is retained, and Delete the second coincidence area M2 (ie, area 15) in the fourth initial image P04 that is only the same scene as the third initial image P03; retain the second coincidence area M2 in the fourth initial image P04 that is the same scene as the first initial image P01 (Ie, area 13), and delete the second overlapping area M2 (ie, area 4) in the first initial image P01 that is only the same scene as the fourth initial image P04. In this way, one first overlapping area M1 and four second overlapping areas M2 are finally reserved. Finally, the processor 60 stitches a first overlap area M1 (ie, area 3), four second overlap areas M2 (ie,

areas

2, 7, 12, and 13), and four initial images P0 to remove the first overlap. The area M1 and the area of the second overlapping area M2 (ie,

areas

1, 6, 11, and 16) are used to generate the final image P2.

In the image acquisition method of the embodiment of the present application, multiple sub-photosensitive surfaces 111 are time-divisionally exposed to acquire multiple initial images P0, and the final image P2 can be quickly generated based on the multiple initial images P0. The lens group 20 is divided into multiple groups of lenses 21. The imaging area 215 of each group of lenses 21 on the imaging surface S1 covers part of the photosensitive surface 11 of the image sensor 10, and the imaging area 215 of the multiple groups of lenses 21 collectively covers all the photosensitive surfaces 11 Compared with a group of lenses 21 corresponding to all photosensitive surfaces 11, the total length (length along the central axis O'direction) of each group of lenses 21 corresponding to part of the photosensitive surface 11 is shorter, so that the overall length of the lens group 20 (The length in the direction of the central axis O′) is short, and the imaging system 100 is easier to install on the terminal 1000.

Referring to FIGS. 3, 4 and 16, in some embodiments, the imaging system 100 further includes a plurality of diaphragms 70. The multiple diaphragms 70 are respectively used to control the amount of incident light of the multiple lenses 21.

Specifically, the diaphragm 70 is arranged on the side of each group of lenses 21 opposite to the image sensor 10, the number of the diaphragm 70 can be two, three, four or more, and the number of the diaphragm 70 can be Determined according to the number of groups of the lens 21, in the embodiment of the present application, the number of diaphragms 70 is the same as the number of groups of the lens 21, which is four (hereinafter referred to as the first diaphragm, the second diaphragm, the third diaphragm and the fourth diaphragm). The aperture, the first aperture, the second aperture, the third aperture and the fourth aperture are respectively arranged on the four groups of lenses 21, and respectively used to control reaching the first sub-photoreceptive surface 1111 and the second sub-photoreceptive surface 1112 , The amount of light of the third sub-sensing surface 1113 and the fourth sub-sensing surface 1114). The plurality of apertures 70 can be driven by the driving structure to change the size of the light inlet of the aperture 70, thereby controlling the amount of light incident by the corresponding set of lenses 21. The processor 60 (shown in FIG. 1) is connected to the driving structure, and the processor 60 controls the time-sharing exposure of the image sensor 10. When the pixel 131 corresponding to the first sub-photosensitive surface 1111 is exposed, the processor 60 controls the driving structure to drive the second diaphragm, the third diaphragm, and the fourth diaphragm to close so that the light cannot reach the second sub-photosensitive surface 1112, the third diaphragm. The sub-photosensitive surface 1113 and the fourth sub-photosensitive surface 1114; when the pixel 131 corresponding to the second sub-photosensitive surface 1112 is exposed, the processor 60 controls the driving structure to drive the first diaphragm, the third diaphragm, and the fourth diaphragm to close so that The light cannot reach the first sub-photoreceptive surface 1111, the third sub-photoreceptive surface 1113, and the fourth sub-photoreceptive surface 1114; when the pixel 131 corresponding to the third sub-photoreceptive surface 1113 is exposed, the processor 60 controls the driving structure to drive the first diaphragm, The second diaphragm and the fourth diaphragm are closed so that the light cannot reach the first sub-photosensitive surface 1111, the second sub-photosensitive surface 1112, and the fourth sub-photosensitive surface 1114; when the pixel 131 corresponding to the fourth sub-photosensitive surface 1114 is exposed, The processor 60 controls the driving structure to drive the first diaphragm, the second diaphragm, and the third diaphragm to close so that light cannot reach the first sub-photoreceptive surface 1111, the second sub-photoreceptive surface 1112, and the third sub-photoreceptive surface 1113. In this way, the processor 60 drives the corresponding diaphragm 70 to close by controlling the driving structure to control the time-sharing exposure of the image sensor 10, which can ensure that different groups of lenses 21 will not cause light interference, and there is no need to provide a light shielding member 14 on the image sensor 10. The area occupied by the light shielding member 14 is reduced, and the area of the image sensor 10 can be reduced.

Please refer to FIG. 15a, FIG. 15b and FIG. 17. In some embodiments, step 02 includes: 021: Rotate multiple initial images P0;

022: Obtain the first overlapping image N1 and the second overlapping image N2 according to a plurality of initial images P0. The first overlapping image N1 is a partial image of the same scene in all the initial images P0, and the second overlapping image N2 is only in two adjacent images. The partial images of the same scene in the two initial images P0 obtained by the exposure of the sub-photosensitive surfaces 111; and 023: splicing the first overlapping image N1, the second overlapping image N2, and the first overlapping image N1 and the first overlapping image N1 and the first overlapping image N1 and the first overlapping image N2 among the multiple initial images P0. The two overlapping images N2 have different partial images in different scenes.

Specifically, since the initial image P0 formed by each group of lenses 21 is an inverted image of the actual scene, before the image processing, the initial image P0 should be rotated, specifically by 180 degrees, so that the direction of the initial image P0 is the same as the actual scene. The direction of the scene is the same. This ensures the accuracy of the orientation of the scene in the image when the multiple initial images P0 are subsequently spliced to generate the final image P2. When the processor 60 (shown in FIG. 1) acquires the first overlapping image N1 and the second overlapping image N2 according to a plurality of initial images P0, it first identifies the first initial image P01, the second initial image P02, the third initial image P03, and the fourth The first overlapping area M1 in the initial image P04, and then the first overlapping image N1 is acquired according to the four first overlapping areas M1. For example, the processor 60 may change the first overlapping area M1 of any initial image P0 (such as the first initial The image of the first overlapping area M1 of the image P01, that is, the area 3) is taken as the first overlapping image N1. Then the processor 60 identifies the second overlapping area M2 in the two adjacent initial images P0, and then obtains a second overlapping image N2 according to the second overlapping area M2 in the two adjacent initial images P0, for example, the processor 60. Any one of the images of the second overlapping area M2 of the two adjacent initial images P0 can be used as the second overlapping image N2, so that four second overlapping images N2 (such as

areas

2, 7, 12, respectively) can be obtained. And 13). The first overlapping image N1 is a partial image with the same scene in all the initial images P0, and the second overlapping image N2 is a partial image with the same scene in the two initial images P0 obtained by exposing only two adjacent sub-photosensitive surfaces 111.

Finally, the processor 60 stitches the first overlapping image N1, the second overlapping image N2, and the partial images of the multiple initial images P0 that are different from the scenes of the first overlapping image N1 and the second overlapping image N2 (ie, multiple initial images). Remove the corresponding images of the first overlapping area M1 and the second overlapping area M2 from P0 to generate the final image P2. In this way, only the first overlapping area M1 and the second overlapping area M2 need to be identified, the calculation amount is small, and the final image P2 can be quickly generated.

Referring to Figure 15a, Figure 15b, Figure 18a, Figure 18b and Figure 19, in some embodiments, regions with the same scene in the multiple initial images P0 are defined as the first overlap area M1, and each first overlap area M1 includes Multiple sub-regions, multiple first overlapping areas M1 include multiple sub-regions with the same scene; areas with the same scene in two adjacent initial images P0 are defined as second overlapping areas M2, and each second overlapping area M2 includes multiple The two adjacent second overlapping areas M2 include multiple sub-regions with the same scene; step 022 includes: 0221: comparing the sub-regions of the same scene in the multiple first overlapping areas M1 to obtain each first overlap The sub-regions at the non-edge positions in the area M1 are used as the first splicing area N3; 0222: compare the sub-areas of the same scene in the adjacent second overlapping area M2 to obtain the sub-regions at the non-corner positions in each second overlapping area M2 The area is used as the second stitching area N4; 0223: stitching multiple first stitching areas N3 to obtain a first overlapping image N1; and 0224: stitching two second stitching areas N4 corresponding to two adjacent initial images P0 to get A plurality of second overlapping images N2.

Specifically, the processor 60 compares the sub-regions of the same scene in the plurality of first overlapping areas M1 to obtain the sub-regions at non-distant locations in the first overlapping area M1 as the first splicing area N3. It can be understood that when each group of lenses 21 is imaging, the sharpness and accuracy of the image in the edge area are generally lower than that of the image in the central area, as shown in FIG. 18a, for example, the first overlap area M1 in the first initial image P01 is divided into There are four sub-regions A1, A2, A3, and A4. The first overlapping area M1 in the second initial image P02 is divided into four sub-regions B1, B2, B3, and B4. The first overlapping area M1 in the third initial image P03 is divided into four sub-regions. There are four sub-regions C1, C2, C3, and C4. The first overlapping area M1 in the fourth initial image P04 is divided into four sub-regions D1, D2, D3, and D4. Among them, the four sub-areas A1, B1, C1, D1 represent the same scene, the four sub-areas A2, B2, C2, D2 represent the same scene, the four sub-areas A3, B3, C3, and D3 represent the same scene, A4, B4 The four sub-areas of, C4 and D4 represent the same scene.

The processor 60 selects a sub-areas at a non-edge position among multiple sub-areas with the same scene as the first stitching area N3, and then stitches the multiple first stitching areas N3 to obtain the first overlapping image N1. Since A1 is close to the center of the first initial image P01, B2 is close to the center of the second initial image P02, C3 is close to the center of the third initial image P03, D4 is close to the center of the fourth initial image P04, A1, B2, C3, and D4 The four sub-regions are all non-edge locations, with high definition and accuracy. The three sub-regions B1, C1 and D1, which are the same as the A1 sub-region scene, are at the edge position, and the definition and accuracy are low; the same as the B2 sub-region scene The three sub-areas of A2, C2 and D2 are at the edge position, and the definition and accuracy are lower; the three sub-areas of A3, B3 and D3, which are the same as the C3 sub-area scene, are at the edge position, and the definition and accuracy are lower; and C4 The three sub-regions A4, B4, and C4 with the same sub-region scene are at the edge position, and the definition and accuracy are low. Therefore, the processor 60 can select the four sub-regions A1, B2, C3, and D4 as the four first splicing areas N3, and then splicing the four first splicing areas N3 together to obtain the first overlapping image N1. The positions of the scenes corresponding to each first splicing area N3 are spliced to ensure the accuracy of the spliced first overlapping image N1. In this way, compared to selecting one of the images of the four first overlapping areas M1 as the first overlapping image N1, the four first splicing areas N3 (A1, B2, C3, and D4) of the first overlapping image N1 The images of the region) are the clearest and most accurate images among the images with the same scene, and the definition and accuracy of the first overlapping image N1 are relatively high.

Referring to FIG. 18a again, the processor 60 compares the sub-regions of the same scene in the adjacent second overlapping areas M2 to obtain the sub-regions at non-corner positions in each second overlapping area M2 as the second splicing area N4. For example, the second overlapping area M2 in the first initial image P01 that has the same scene as the second initial image P02 includes two sub-areas E1 and E2, and the second overlapping area M2 in the second initial image P02 is the same scene as the first initial image P01. Including two sub-regions F1 and F2. Among them, the scenes of E1 and F1 are the same, and the scenes of E2 and F2 are the same, but the E1 sub-region is close to the center of the first initial image P01, which is a non-corner position, and the definition and accuracy are higher than that of the F1 sub-region located at the corner. And the accuracy is higher. Similarly, the definition and accuracy of the F2 sub-region located in the non-corner position is higher than that of the E2 sub-region located in the corner position. Similar to the above description, in the second overlapping area M2 in the adjacent second initial image P02 and the third initial image P03, the definition and accuracy of the H1 sub-region is higher than that of the I1 sub-region. High, the definition and accuracy of the I2 sub-region is higher than that of the H2 sub-region; in the second overlapping area M2 in the adjacent third initial image P03 and the fourth initial image P04, the J1 sub-region The definition and accuracy of the area is higher than that of the K1 sub-area, and the definition and accuracy of the K2 sub-area is higher than that of the J2 sub-area; in the adjacent fourth initial image In the second overlapping area M2 in P04 and the first initial image P01, the definition and accuracy of the L1 sub-region is higher than that of the Q1 sub-region, and the definition and accuracy of the Q2 sub-region is higher than that of the L2 sub-region. The clarity and accuracy of the area is higher.

Referring to FIG. 18b again, the processor 60 may use the E1 sub-region in the first initial image P01 and the F2 sub-region in the second initial image P02 as the two second stitching regions N4 of the first second overlapping image N2, and The H1 subarea in the second initial image P02 and the I2 subarea of the third initial image P03 are used as the two second stitching areas N4 of the second second overlapping image N2, and the J1 subarea and the first subarea in the third initial image P03 The K2 subregion of the four initial image P04 is used as the two second stitching regions N4 of the third second overlapping image N2, and the L1 subregion in the fourth initial image P04 and the Q2 subregion of the first initial image P01 are used as the fourth Two second stitching areas N4 of the second overlapping image N2. The processor 60 stitches the two second stitching areas N4 corresponding to the two adjacent initial images P0 together according to the corresponding scene positions to obtain four second overlapping images N2 respectively. Specifically, the two second stitching regions N4 (ie, the E1 sub-region and the F2 sub-region) formed by the first initial image P01 and the second initial image P02 are stitched to obtain the first second overlapping image N2, and the second initial image is stitched P02 and the third initial image P03 form two second splicing areas N4 (ie H1 sub-area and I2 sub-area) to obtain the second second overlapping image N2, which is formed by splicing the third initial image P03 and the fourth initial image P04 The two second splicing areas N4 (ie, the J1 sub-area and the K2 sub-area) to obtain the third second overlapping image N2, and the two second splicing areas formed by splicing the fourth initial image P04 and the first initial image P01 N4 (ie L1 sub-region and Q2 sub-region) to obtain the fourth second overlapping image N2. Since the images in the two second splicing areas N4 of the four second overlapping images N2 are respectively the areas with the same scene in the second overlapping area M2 in the two adjacent initial images P0 with higher definition and accuracy Compared with the image of the second overlapping area M2 of any one of the two adjacent initial images P0 selected as the second overlapping image N2, the second overlapping image N2 has higher definition and accuracy. Finally, the processor 60 splices the first overlapping image N1, the four second overlapping images N2, and the four initial images to remove the parts of the first overlapping area M1 and the second overlapping area M2 to form the final image P2 as shown in FIG. 18b. When stitching, stitching can be performed according to the position of the scene corresponding to the part of the first overlapping image N1, the four second overlapping images N2 and the four initial images excluding the first overlapping area M1 and the second overlapping area M2 to ensure the stitching The accuracy of the final image P2.

Please refer to FIG. 15a, FIG. 15b, FIG. 18a, FIG. 18b, and FIG. 20. In some embodiments, step 022 includes: 0225: Obtain the first pixel value of each pixel 131 in the plurality of first overlap regions; 0226: Take the first average value of the first pixel value of the pixel 131 corresponding to the same scene in each of the multiple first overlapping areas, and generate the first overlapping image according to the multiple first average values; 0227: Obtain each of the multiple second overlapping areas The second pixel value of each pixel 131; and 0228: Obtain the second average value of the second pixel value of each pixel 131 corresponding to the same scene in two adjacent second overlapping areas, and generate a plurality of second pixel values according to the plurality of second average values. The second overlay image.

Specifically, the processor 60 obtains the first pixel value of each pixel 131 in the plurality of first overlapping areas M1 in the plurality of initial images P0, and can determine the pixel value corresponding to each of the same scenes in the plurality of first overlapping areas M1. The first pixel value of 131 is calculated to obtain the first average value. For example, assuming that each sub-region corresponds to a pixel 131, as shown in FIG. 18a, in the first initial image P01 to the fourth initial image P04, the scenes of the four sub-regions A1, B1, C1, and D1 are the same, and the scenes of A1, B1, C1, and C1 are the same. The pixels 131 in the four sub-regions of D1 correspond one-to-one, and the first pixel values of the pixels 131 corresponding to the four regions A1, B1, C1, and D1 are added together and the average value is taken to obtain the first pixel value. Similarly, the pixels 131 corresponding to the four sub-regions A2, B2, C2, D2 correspond one-to-one, the pixels 131 corresponding to the four sub-regions A3, B3, C3, and D3 correspond one-to-one, and the four sub-regions A4, B4, C4, and D4. The corresponding pixels 131 are in one-to-one correspondence. Repeat the above process for the four sub-regions A2, B2, C2, D2, the four sub-regions A3, B3, C3, and D3, and the four sub-regions A4, B4, C4, and D4. The first pixel value of each pixel 131 corresponding to the same scene in the first overlap area M1 is summed and the average value is taken to obtain four first average values, and then the first overlapping image N1 is generated according to the four first average values, for example, The four first average values are used as the pixel values of the four pixels 131 of the first overlap image N1 to generate the first overlap image N1. It should be pointed out that in the above expression, each sub-region corresponds to a pixel 131 to facilitate the description of the principle of obtaining the first overlapping image N1. It cannot be understood that each sub-image can only correspond to one pixel 131, and each sub-region can correspond to multiple pixels. 131, such as 2, 3, 5, 10, 100, 1,000, or even 100,000, millions, etc.

Then the processor 60 obtains the second pixel value of each pixel 131 in the second overlapping area N2 in the plurality of initial images P0, and according to the second pixel value of each pixel 131 corresponding to the same scene in the plurality of second overlapping areas N2 The value is calculated to obtain the second mean value. For example, as shown in Figure 18a, the scenes of the E1 area of the first initial image P01 and the F1 area of the second initial image P02 are the same. The pixels 131 of the two areas E1 and F1 correspond to each other, and the two areas E1 and F1 The second pixel values of the corresponding pixels 131 are summed and then averaged to obtain a second average value. Similarly, the second pixel values of the corresponding pixels 131 in the two regions E2 and F2 can be summed and then averaged to obtain a second average value. The second average value is used to generate a second overlapping image N2 based on the two second average values. For example, the two first average values are used as the pixel values of the two pixels 131 of the second overlap image N2 to generate the second overlap image N2. It can be understood that the methods for acquiring the other three second overlapping images N2 are basically the same as those described above, and will not be repeated here. In this way, instead of selecting the image of one of the first overlapping areas M1 as the first overlapping image N1, selecting the image of one of the second overlapping areas M2 as the second overlapping image N2 the image of the first overlapping area M1 or the second overlapping area As far as the image of M2 has an edge region with lower definition and accuracy, the processor 60 calculates the first average value by using the first pixel values of the corresponding pixels 131 of the four first overlapping areas M1, and uses the first average value as the first overlap. The pixel value of the pixel corresponding to the image N1 is calculated from the second pixel value of the pixel 131 corresponding to the second overlapping area M2 of the two adjacent initial images P0, and the second average value is calculated as the pixel value of the pixel corresponding to the second overlapping image N2 to obtain The first overlapping image N1 and the second overlapping image N2 are more clear.

In the description of this specification, reference is made to the terms “certain embodiments”, “one embodiment”, “some embodiments”, “exemplary embodiments”, “examples”, “specific examples”, or “some examples”. The description means that a specific feature, structure, material, or characteristic described in combination with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above-mentioned terms does not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one feature. In the description of the present application, "a plurality of" means at least two, for example two, three, unless otherwise specifically defined.

Although the embodiments of the present application have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary and should not be construed as limiting the present application. A person of ordinary skill in the art can comment on the foregoing within the scope of the present application. The embodiments are subject to changes, modifications, substitutions and modifications, and the scope of this application is defined by the claims and their equivalents.

Claims

An image sensor, characterized in that the image sensor comprises:

Hyperlens; and

Pixel array, the pixel array is located on the light exit side of the hyper lens, and the hyper lens is used to split the incident light from the light entrance side of the hyper lens to form multiple outgoing light rays with different wavelengths. The emitted light of the wavelength is emitted to the pixel array from the light emitting side at different emission angles.
The image sensor according to claim 1, wherein the hyper lens comprises:

A lens body, the lens body including a light-incident surface on the light-incident side and a light-emitting surface on the light-exit side; and

The microstructure array is arranged on the light incident surface.
The image sensor according to claim 2, wherein the microstructure array comprises a plurality of microstructure groups, the microstructure group comprises a plurality of microstructure units, the pixel array comprises a plurality of pixel groups, and the The pixel groups correspond to the microstructure groups one-to-one.
3. The image sensor according to claim 3, wherein the shape, size, arrangement and angle of the plurality of microstructure units of the microstructure group are determined according to the wavelength and the exit angle of the emitted light.
The image sensor according to claim 3, wherein the pixel group includes a first pixel, a second pixel, a third pixel, and a fourth pixel, and the multiple types of emitted light with different wavelengths include red light, first Green light, second green light and blue light, the first pixel is used to receive the red light, the second pixel is used to receive the first green light, and the third pixel is used to receive the blue light, The fourth pixel is used to receive the second green light.
The image sensor according to claim 3, wherein the pixel group includes a first pixel, a second pixel, a third pixel, and a fourth pixel, and the multiple types of emitted light with different wavelengths include red light, first Yellow light, second yellow light and blue light, the first pixel is used to receive the red light, the second pixel is used to receive the first yellow light, and the third pixel is used to receive the blue light, The fourth pixel is used to receive the second yellow light.
The image sensor according to claim 3, wherein the image sensor comprises a microlens array, the microlens array is arranged on the light incident side, the microlens array comprises a plurality of microlenses, and the microlens The lens, the pixel group and the microstructure group have a one-to-one correspondence.
The image sensor according to claim 7, wherein the image sensor includes a photosensitive surface on an imaging surface, the photosensitive surface includes a plurality of sub-sensing surfaces, and on each of the sub-sensing surfaces, the sub-sensing surface The micro lens corresponding to the center position of the photosensitive surface is aligned with the micro structure group, and the micro lens corresponding to the non-central position and the micro structure group are offset from each other.
The image sensor according to claim 8, wherein, in the sub-photosensitive surface, a plurality of circles centered on the center position are all located at the non-central positions, and as the microlens is located, the circle As the radius gradually increases, the offset between the microlens and the corresponding microstructure group also gradually increases.
An imaging system, characterized in that it comprises:

Lens group; and

An image sensor, the image sensor is arranged on the image side of the lens group;

The image sensor includes: a super lens; and a pixel array, the pixel array is located on the light exit side of the super lens, and the super lens is used to split the incident light from the light entrance side of the super lens. A plurality of outgoing rays of different wavelengths are formed, and the outgoing rays of different wavelengths are emitted from the light emitting side to the pixel array at different emission angles.
The imaging system of claim 10, wherein the super lens comprises:

A lens body, the lens body including a light-incident surface on the light-incident side and a light-emitting surface on the light-exit side; and

The microstructure array is arranged on the light incident surface.
The imaging system according to claim 11, wherein the microstructure array comprises a plurality of microstructure groups, the microstructure group comprises a plurality of microstructure units, the pixel array comprises a plurality of pixel groups, and the The pixel groups correspond to the microstructure groups one-to-one.
The imaging system according to claim 12, wherein the shape, size, arrangement and angle of the plurality of microstructure units of the microstructure group are determined according to the wavelength and the exit angle of the emitted light.
The imaging system according to claim 12, wherein the pixel group includes a first pixel, a second pixel, a third pixel, and a fourth pixel, and the emitted light rays with different wavelengths include red light, first Green light, second green light and blue light, the first pixel is used to receive the red light, the second pixel is used to receive the first green light, and the third pixel is used to receive the blue light, The fourth pixel is used to receive the second green light.
The imaging system according to claim 12, wherein the pixel group includes a first pixel, a second pixel, a third pixel, and a fourth pixel, and the multiple types of emitted light with different wavelengths include red light, first Yellow light, second yellow light and blue light, the first pixel is used to receive the red light, the second pixel is used to receive the first yellow light, and the third pixel is used to receive the blue light, The fourth pixel is used to receive the second yellow light.
The imaging system according to claim 12, wherein the image sensor comprises a microlens array, the microlens array is arranged on the light incident side, the microlens array comprises a plurality of microlenses, and the microlens The lens, the pixel group and the microstructure group have a one-to-one correspondence.
The imaging system of claim 16, wherein the image sensor includes a photosensitive surface on an imaging surface, the photosensitive surface includes a plurality of sub-photosensitive surfaces, and on each of the sub-photosensitive surfaces, the sub-photosensitive surface The micro lens corresponding to the center position of the photosensitive surface is aligned with the micro structure group, and the micro lens corresponding to the non-central position and the micro structure group are offset from each other.
The imaging system according to claim 17, wherein in the sub-photosensitive surface, a plurality of circles centered on the center position are all located at the non-central positions, and follow the circle where the micro lens is located. As the radius gradually increases, the offset between the microlens and the corresponding microstructure group also gradually increases.
The imaging system of claim 10, wherein the image sensor includes a photosensitive surface on an imaging surface, the lens group includes a plurality of groups of lenses, and each group of the lenses covers an imaging area of the imaging surface For part of the photosensitive surface, the imaging area of the multiple groups of lenses on the imaging surface collectively covers all the photosensitive surface.
A terminal, characterized in that it comprises:

Shell; and

The imaging system of claim 19, which is mounted on the housing.