Image forming apparatus

Abstract

The invention discloses an imaging device, and belongs to the technical field of optical imaging, the imaging device comprises an optical system and an image sensor, the optical system comprises a first optical assembly and a second optical assembly, the first optical assembly comprises a first lens, and the second optical assembly comprises a second lens. The image sensor comprises a first sensing part and a second sensing part, the first sensing part is used for sensing emergent light of the first optical assembly, the second sensing part is used for sensing emergent light of the second optical assembly, and the chief ray angle of the first lens is matched with the chief ray angle of the first sensing part; and / or the chief ray angle of the second lens is matched with the chief ray angle of the second sensing part; the imaging device can share one image sensor when the first optical assembly and the second optical assembly are used for imaging of multiple field angles, the complexity of the imaging device is reduced, and the cost of the imaging device is reduced.

Description

Technical Field

[0001] This application relates to the field of optical imaging technology, and more particularly to an imaging device. Background Technology

[0002] With the development of vehicle technology, using imaging devices to assist human driving and AI autonomous driving has become a common trend.

[0003] In related technologies, imaging devices typically consist of one lens equipped with one image sensor. Therefore, each image sensor can only image from a single field of view. When imaging from multiple field of view is required, multiple lenses equipped with corresponding image sensors are needed. However, this approach of using multiple lenses with multiple image sensors increases the complexity of the imaging device, leading to higher costs. Summary of the Invention

[0004] The purpose of this application is to provide an imaging device that reduces the cost of imaging devices, thereby at least partially solving the above-mentioned technical problems.

[0005] To achieve the above objectives, this application provides an imaging device, comprising: An optical system, including a first optical component and a second optical component, wherein the first optical component includes a first lens and the second optical component includes a second lens; An image sensor includes a first sensing unit and a second sensing unit, wherein the first sensing unit is used to sense the emitted light of a first optical component, and the second sensing unit is used to sense the emitted light of a second optical component; Wherein, the principal ray angle of the first lens is adapted to the principal ray angle of the first sensing unit, and / or the principal ray angle of the second lens is adapted to the principal ray angle of the second sensing unit.

[0006] Optionally, the principal ray angle of the first sensing unit is configured with a non-Gaussian distribution; and / or, The main ray angle of the second sensing unit is configured as a non-Gaussian distribution.

[0007] Optionally, the first sensing unit and the second sensing unit are arranged opposite to each other; or, The first sensing unit is located around the second sensing unit.

[0008] Optionally, the first lens has a first focal length and the second lens has a second focal length, satisfying: 0.6 < first focal length / second focal length ≤ 1.

[0009] Optionally, the image sensor has a normal, the first lens has a first optical axis, the second lens has a second optical axis, and at least one of the first and second optical axes intersects the normal.

[0010] Optionally, the first optical component includes a first deflecting device located on the light-emitting side of the first lens and configured to reflect the light emitted from the first lens; and / or, The second optical component includes a first deflector located on the light-emitting side of the second lens and configured to reflect the light emitted from the second lens.

[0011] Optionally, the first optical component includes a second deflector located on the light-incident side of the first sensing unit and configured to transmit incident light to the first sensing unit; and / or, The second optical component includes a second deflector located on the light-incident side of the second sensing unit and configured to transmit incident light to the second sensing unit.

[0012] Optionally, the first lens has a first lens element, and the second lens has a second lens element. The first lens element is located on the light-emitting side of the first lens and has a first lens element focal length. The second lens element is located on the light-emitting side of the second lens and has a second lens element focal length, satisfying: 0 < first lens element focal length / second lens element focal length ≤ 1.

[0013] Optionally, the first lens has a first back focal length satisfying: 10mm ≤ first back focal length ≤ 30mm; and / or, The second lens has a second back focal length, which satisfies the condition: 10mm ≤ second back focal length ≤ 30mm.

[0014] Optionally, the first optical component includes a first deflecting device, a first lens has a first back focal length, the principal ray of the central field of view of the first lens has a first incident point on the first deflecting device, and a first sensing point on the first sensing unit, with a first distance between the first incident point and the first sensing point, satisfying: 0.58 < first distance / first back focal length < 1; and / or, The second optical component includes a first deflection device, a second lens having a second back focal length, the principal ray of the central field of view of the second lens having a second incident point on the first deflection device and a second sensing point on the second sensing unit, and a second distance between the second incident point and the second sensing point, satisfying: 0.58 < second distance / second back focal length < 1.

[0015] Optionally, the first lens has a first field of view, the second lens has a second field of view, and the first lens and the second lens have an overlapping field of view, satisfying: 0.3 <c / (a+b)<0.5。

[0016] In the imaging device of this application embodiment, the first optical component can perform imaging in the first sensing unit, and the second optical component can perform imaging in the second sensing unit. This allows the imaging device to share a single image sensor when performing imaging with the first and second optical components at multiple field angles, thereby reducing the complexity and cost of the imaging device. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0019] Figure 1 This is a schematic diagram of the imaging device in an exemplary embodiment of the present disclosure; Figure 2 This is a schematic diagram of the imaging device in another exemplary embodiment of this disclosure; Figure 3 This is a schematic diagram of the imaging device in yet another exemplary embodiment of this disclosure; Figure 4 This is a planar schematic diagram of an image sensor according to an exemplary embodiment of this disclosure; Figure 5 This is a planar schematic diagram of an image sensor according to another exemplary embodiment of this disclosure; Figure 6 This is a partial optical path diagram of an optical component in an exemplary embodiment of this disclosure.

[0020] Explanation of reference numerals in the attached figures: 1. Optical system; 11. First optical component; 111. First lens; 1111. First lens element; 12. Second optical component; 121. Second lens; 1211. Second lens element; 13. First deflecting device; 14. Second deflecting device; 2. Image sensor; 21. First sensing unit; 22. Second sensing unit; N, normal; Z1, first optical axis; Z2, second optical axis; d, wedge angle; e, placement angle; A1, first incident point; B1, first sensing point; D1, first distance; A2, second incident point; B2, second sensing point; D2, second distance; a, first field of view; b, second field of view; c, coincident field of view. Detailed Implementation

[0021] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0022] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0023] In the various figures of this application, for ease of illustration, certain dimensions of structures or parts may be exaggerated relative to other structures or parts; therefore, they are only used to illustrate the basic structure of the subject matter of this application.

[0024] Please see Figures 1 to 3 This application provides an imaging device that can be used in vehicles, such as a panoramic imaging device or a surround imaging device for vehicles.

[0025] In some embodiments, continue to refer to Figure 1 As shown, the imaging device includes an optical system 1 and an image sensor 2.

[0026] In this embodiment, the incident light (e.g., reflected light from the surface of an object) is modulated by the optical system 1 and then emitted to the image sensor 2. The image sensor 2 can convert the received light signal into an electrical signal.

[0027] For example, the image sensor 2 can be a charge-coupled device (CCD) or a complementary metal-oxide semiconductor (CMOS).

[0028] In some embodiments, the optical system 1 includes a first optical component 11 and a second optical component 12.

[0029] In this embodiment, the incident light is modulated by the first optical component 11 and the second optical component 12 before being emitted to the image sensor 2.

[0030] In some embodiments, the first optical component 11 includes a first lens 111.

[0031] In this embodiment, the first lens 111 is located on the light-incident side of the first optical component 11, that is, when light is incident on the first optical component 11, it first incident on the first lens 111.

[0032] In some embodiments, the second optical component 12 includes a second lens 121.

[0033] In this embodiment, the second lens 121 is located on the light-incident side of the second optical component 12, that is, when light is incident on the second optical component 12, it first enters the second lens 121.

[0034] In some embodiments, the image sensor 2 includes a first sensing unit 21 and a second sensing unit 22.

[0035] In this embodiment, the first sensing unit 21 and the second sensing unit 22 are located at different positions of the image sensor 2.

[0036] In some embodiments, the first sensing unit 21 is used to sense the emitted light from the first optical component 11.

[0037] In this embodiment, the first sensing unit 21 can be disposed on the image plane of the first optical component 11, that is, the imaging area of ​​the first optical component 11 is located on the first sensing unit 21.

[0038] In some embodiments, the second sensing unit 22 is used to sense the emitted light from the second optical component 12.

[0039] In this embodiment, the second sensing unit 22 can be disposed on the image plane of the second optical component 12, that is, the imaging area of ​​the second optical component 12 is located on the second sensing unit 22.

[0040] In this embodiment, the first optical component 11 can perform imaging in the first sensing unit 21, and the second optical component 12 can perform imaging in the second sensing unit 22. This allows the imaging device to share a single image sensor 2 when performing imaging with the first optical component 11 and the second optical component 12 at multiple field angles, thereby reducing the complexity and cost of the imaging device.

[0041] In this embodiment, compared to the solution of "imaging device combined with a single large field of view lens (e.g., a vehicle surround view lens)", this solution adopts a solution of two optical components sharing a single image sensor 2. The field of view required by a single lens is reduced, the distortion at the edge of the lens is reduced, and the imaging quality is improved.

[0042] In some embodiments, the principal ray angle of the first lens 111 is adapted to the principal ray angle of the first sensing unit 21, and / or the principal ray angle of the second lens 121 is adapted to the principal ray angle of the second sensing unit 22.

[0043] In this embodiment, the chief ray angle (CRA) of the lens (e.g., the first lens 111 and / or the second lens 121) refers to the angle between the chief ray (e.g., the ray passing through the center of the aperture stop) from the lens to the image sensor 2 and the optical axis on the image plane. The chief ray angle of the sensing unit (e.g., the first sensing unit 21 or the second sensing unit 22) refers to the maximum angle of light that can be effectively focused onto the pixel from the lens to the image sensor 2. It is determined by the microlens layout of the image sensor 2 and the position of the photodiode, reflecting the image sensor 2's ability to receive light from different angles.

[0044] In this embodiment, the principal ray angle of the lens (e.g., the first lens 111 and / or the second lens 121) is adapted to the principal ray angle of the sensing unit (e.g., the first sensing unit 21 and / or the second sensing unit 22), which can improve the imaging quality of the imaging device.

[0045] In this embodiment, the principal ray angle of the lens and the principal ray angle of the sensing unit are matched. This can mean that the principal ray angle of the lens and the principal ray angle of the sensing unit are equal, or that the difference between them is within a certain range. The difference being within a certain range can mean that the deviation between them does not exceed 5° (for example, the deviation can not exceed 2°). For example, the principal ray angle of the lens is 2° smaller than the principal ray angle of the sensing unit.

[0046] In this embodiment, when designing the imaging device, the principal ray angle of the sensing unit is designed first (for example, by changing the arrangement of the microlens array), and then the principal ray angle of the lens is adjusted according to the principal ray angle of the sensing unit. After the two are adapted, the imaging quality of the imaging device can be improved.

[0047] In this embodiment, the principal ray angle of the first lens 111 is adapted to the principal ray angle of the first sensing unit 21, and the principal ray angle of the second lens 121 is adapted to the principal ray angle of the second sensing unit 22. This can simultaneously improve the imaging quality of the two optical components on the two sensing units and avoid deviations in the imaging quality of the two sensing units.

[0048] Of course, it is also possible that only the principal ray angle of the first lens 111 and the principal ray angle of the first sensing unit 21 are matched. Alternatively, only the principal ray angle of the second lens 121 and the principal ray angle of the second sensing unit 22 are matched. Thus, different imaging needs can be met.

[0049] In some embodiments, the principal ray angle of the first sensing unit 21 is configured to have a non-Gaussian distribution, and / or the principal ray angle of the second sensing unit 22 is configured to have a non-Gaussian distribution.

[0050] In this embodiment, the principal ray angle of the sensing unit (e.g., the first sensing unit 21 and / or the second sensing unit 22) is distributed in a non-Gaussian manner (e.g., a sinusoidal manner). Compared with a Gaussian manner, after the principal ray angle of the lens and the principal ray angle of the sensing unit are matched, the illumination of the edge area and the center area of ​​the sensing unit is uniform, reducing color deviation and light crosstalk.

[0051] For example, a non-Gaussian distribution can be a sinusoidal distribution. This improves the clarity, color difference, light efficiency (light energy utilization efficiency), and contrast of the sensor image, meeting the imaging requirements of the vehicle.

[0052] For example, in a sinusoidal distribution, the incident angle of the main ray on the sensing unit exhibits a sinusoidal distribution pattern as the pixel position changes. A sinusoidal distribution can also mean that the relationship between the offset of the pixel's microlens and the pixel's position on the image sensor 2 (e.g., image height) is a sinusoidal function. When designing the image sensor 2, it can be pre-set that the change in the incident ray angle with image height follows a sinusoidal function.

[0053] Of course, non-Gaussian distributions can also be linear distributions, multinomial distributions, exponential distributions, step distributions, or other irregular distributions.

[0054] For example, the principal ray angle of the first sensing unit 21 is configured to have a sinusoidal distribution, and the principal ray angle of the second sensing unit 22 is configured to have a sinusoidal distribution.

[0055] In other embodiments, the principal ray angle of the sensing unit (e.g., the first sensing unit 21 and / or the second sensing unit 22) may also be configured as a Gaussian distribution.

[0056] In some embodiments, in conjunction with reference Figure 4 As shown, the first sensing unit 21 and the second sensing unit 22 are arranged opposite to each other.

[0057] In this embodiment, the first sensing unit 21 and the second sensing unit 22 are arranged opposite to each other, which can make full use of all the pixels of the image sensor 2 and is suitable for vehicle use scenarios, such as surround view and panoramic imaging devices.

[0058] In this embodiment, compared to the solution where "the first sensing unit 21 is located on the periphery of the second sensing unit 22", the imaging area of ​​the first sensing unit 21 is not too small, and part of the image of the second sensing unit 22 is not obscured, which is beneficial for the user to clearly observe the two images generated by the first sensing unit 21 and the second sensing unit 22.

[0059] For example, when the image sensor 2 is rectangular, the first sensing part 21 and the second sensing part 22 are arranged opposite to each other along the length direction or the width direction of the image sensor 2 (e.g., symmetrical arrangement).

[0060] In other embodiments, in conjunction with reference Figure 5 As shown, the first sensing unit 21 is located around the second sensing unit 22.

[0061] In this embodiment, the corresponding side lengths of the first sensing unit 21 are all smaller than those of the second sensing unit 22, forming a picture-in-picture display format, which satisfies different imaging needs.

[0062] In some embodiments, the first sensing unit 21 and the second sensing unit 22 are coplanar, that is, the image plane of the first optical component 11 and the image plane of the second optical component 12 are coplanar. This saves space occupied by the image sensor 2 along the normal N direction.

[0063] In some embodiments, the first lens 111 has a first focal length and the second lens 121 has a second focal length, satisfying: 0.6 < first focal length / second focal length ≤ 1.

[0064] In this embodiment, when the imaging device uses two lenses to form an image, it can use two lenses with the same focal length (e.g., the first focal length is equal to the second focal length), or it can use lenses with different focal lengths (e.g., a combination of a telephoto lens and a short-focal-length lens) to meet different imaging requirements.

[0065] For example, the value of "first focal length / second focal length" can be 0.7, 0.8, 0.9, or 1.

[0066] In some embodiments, both the first lens 111 and the second lens 121 are configured as telephoto lenses or short-focus lenses.

[0067] In this embodiment, when both lenses are telephoto lenses, it can be used for a panoramic imaging device in the far field of a vehicle. When both lenses are short-focal-length lenses, it can be used for a panoramic or surround-view imaging device in the near field of a vehicle.

[0068] For example, a vehicle's panoramic imaging device can have a wide field of view (FOV), enabling it to capture environmental information at a greater distance around the vehicle. This can be used in driving scenarios such as lane detection, traffic sign recognition, and detection of vehicles and pedestrians ahead. It allows for long-range vision and is suitable for monitoring road conditions at high speeds.

[0069] For example, a vehicle's surround-view imaging device can employ an ultra-wide-angle or fisheye lens, capable of covering a 360-degree field of view around the vehicle. This can be used for parking assistance and near-field environmental perception, helping drivers park safely in tight spaces while also providing functions such as lane departure warning and blind spot monitoring.

[0070] In some embodiments, one of the first lens 111 and the second lens 121 is configured as a telephoto lens, and the other of the first lens 111 and the second lens 121 is configured as a short-focus lens.

[0071] In this embodiment, when the imaging device includes a telephoto lens and a short-focus lens, it can meet both far-field and near-field imaging needs.

[0072] For example, the focal length of a short-focus lens can be between 60mm and 80mm, such as 60mm, 65mm, 70mm, 75mm, and 80mm. The focal length of a telephoto lens can be between 90mm and 110mm, such as 90mm, 95mm, 100mm, 105mm, and 110mm.

[0073] In some embodiments, continue to refer to Figures 1 to 3 As shown, the image sensor 2 has a normal N, the first lens 111 has a first optical axis Z1, and the second lens 121 has a second optical axis Z2. At least one of the first optical axis Z1 and the second optical axis Z2 intersects the normal N.

[0074] In this embodiment, the first optical axis Z1 and / or the second optical axis Z2 intersect the normal N, ensuring that the optical axis of at least one of the first lens 111 and the second lens 121 intersects the normal N of the image sensor 2. That is, the optical axis of the lens (the first optical axis Z1 and / or the second optical axis Z2) is offset from the normal N of the image sensor 2. This method enables the adjustment of the principal ray angle of the lens to adapt and adjust the principal ray angle of the lens (e.g., the first lens 111 and / or the second lens 121) and the principal ray angle of the sensing unit (e.g., the first sensing unit 21 and / or the second sensing unit 22).

[0075] For example, such as Figure 1 , Figure 2 and Figure 3 As shown, the first optical axis Z1 intersects the second optical axis Z2. Of course, the first optical axis Z1 and the second optical axis Z2 can also be parallel to each other.

[0076] For example, such as Figure 1 The first lens 111 is a short focal length lens. Considering that the short focal length lens refracts light less, it is not necessary to adapt the principal ray angle of the first lens 111 (i.e., the short focal length lens), that is, the first optical axis Z1 is parallel to the normal N, thus simplifying the design. Furthermore, the first optical component 11 does not need to be equipped with a deflection device.

[0077] For example, such as Figure 2 The first lens 111 is a short focal length lens. Considering that the short focal length lens has a smaller degree of light refraction, by intersecting the first optical axis Z1 with the normal N, the principal ray angle of the first lens 111 (i.e., the short focal length lens) can be matched with the principal ray angle of the first sensing unit 21 without the need for additional deflection devices, thus simplifying the design.

[0078] For example, such as Figure 1 , Figure 2 and Figure 3 As shown, the second lens 121 is a telephoto lens. By intersecting the second optical axis Z2 with the normal N, the principal ray angle of the second lens 121 (i.e., the telephoto lens) can also be adapted to the principal ray angle of the second sensing unit 22.

[0079] In some embodiments, the first optical component 11 includes a first deflector 13 located on the light-emitting side of the first lens 111 and configured to reflect the emitted light from the first lens 111; and / or, the second optical component 12 includes a first deflector 13 located on the light-emitting side of the second lens 121 and configured to reflect the emitted light from the second lens 121.

[0080] In this embodiment, the optical components (e.g., the first optical component 11 and / or the second optical component 12) can utilize the reflection from the first deflector 13 to adapt and adjust the principal ray angle of the lens (e.g., the first lens 111 and / or the second lens 121) to the principal ray angle of the sensing unit (e.g., the first sensing unit 21 and / or the second sensing unit 22), thereby satisfying the imaging quality requirements. Furthermore, the folding of the optical path by the first deflector 13 improves the spatial feasibility of the imaging device.

[0081] For example, such as Figure 1 and Figure 2 The first deflecting device 13 is a reflective optical device that can deflect incident light (such as light emitted from a lens) and reflect the light to the sensing unit or the second deflecting device 14.

[0082] For example, such as Figure 1 As shown, the second lens 121 is a telephoto lens. Considering that the telephoto lens refracts light to a greater degree, when the lens and the sensing unit are matched for the principal ray angle, the first deflection device 13 can be used for deflection modulation.

[0083] For example, such as Figure 1As shown, only the second optical component 12 is equipped with the first deflection device 13, which is used to adapt and adjust the principal ray angle of the second lens 121 and the principal ray angle of the second sensing unit 22. The first optical component 11 is not equipped with the first deflection device 13, which simplifies the structure of the imaging device.

[0084] For example, such as Figure 1 As shown, the first deflector 13 is located on the light-incident side of the second sensing unit 22, and the second lens 121, the first deflector 13, and the second sensing unit 22 are arranged sequentially along the light path transmission direction.

[0085] In some embodiments, the first deflector 13 can also absorb light in non-operating wavelength bands.

[0086] In this embodiment, the incident light, after passing through the first deflector 13, can only reflect light in the working wavelength band, while light in the non-working wavelength band is absorbed by the first deflector 13. Therefore, there is no need to set up additional filter devices in the optical path, shortening the optical path of the optical components and helping to suppress stray light.

[0087] Of course, if the optical components do not have the first deflection device 13, a coating can be applied to the lens to suppress stray light.

[0088] For example, the operating band that the image sensor 2 (e.g., the first sensing unit 21 and / or the second sensing unit 22) can sense may be the visible light band and / or the infrared band.

[0089] In some embodiments, the first optical component 11 includes a second deflector 14 located on the light-incident side of the first sensing unit 21 and configured to transmit incident light to the first sensing unit 21; and / or the second optical component 12 includes a second deflector 14 located on the light-incident side of the second sensing unit 22 and configured to transmit incident light to the second sensing unit 22.

[0090] In this embodiment, the optical components (e.g., the first optical component 11 and / or the second optical component 12) can utilize the transmission of the second deflector 14 to adapt and adjust the principal ray angle of the lens (e.g., the first lens 111 and / or the second lens 121) to the principal ray angle of the sensing unit (e.g., the first sensing unit 21 and / or the second sensing unit 22), thereby satisfying the imaging quality requirements. Furthermore, the second deflector 14, by folding the optical path, improves the spatial feasibility of the imaging device.

[0091] For example, such as Figure 2 and Figure 3As shown, the second deflector 14 is a transmissive optical device that can deflect incident light (such as the light emitted from the lens or the light emitted from the first deflector 13) while transmitting the light to the sensing unit. Compared with the modulation method of reflection, the second deflector 14 transmits incident light, which provides greater flexibility in the arrangement of optical components and is beneficial for adapting the principal ray angle and the spatial feasibility of the imaging device.

[0092] For example, such as Figure 3 As shown, both the first lens 111 and the second lens 121 are telephoto lenses. Considering that telephoto lenses refract light to a greater degree, when the lens and the sensing unit are matched at the principal ray angle, using only an off-center method (i.e., both the first optical axis Z1 and the second optical axis Z2 intersect the normal N) is insufficient to meet the matching adjustment requirements. Therefore, by equipping both the first optical assembly 11 and the second optical assembly 12 with a second deflection device 14, the adjustment range of the lens's principal ray angle is increased, improving the matching adjustment range and meeting the adjustment requirements for the principal ray angle matching between the lens and the sensing unit. Furthermore, by equipping only the second deflection device 14 in the first optical assembly 11 and the second optical assembly 12, and omitting the first deflection device 13, the structure of the imaging device can be simplified.

[0093] For example, such as Figure 2 As shown, the second optical component 12 is equipped with both a first deflection device 13 and a second deflection device 14. The first lens 111 is a short-focal-length lens, and the second lens 121 is a telephoto lens. By simultaneously using the first deflection device 13 and the second deflection device 14 to adapt the principal ray angle of the second lens 121 (i.e., the telephoto lens), the adjustment range of the lens's principal ray angle is larger, improving the adaptation and adjustment range and meeting the adjustment needs of the lens and the sensing unit for principal ray angle adaptation.

[0094] For example, such as Figure 2 As shown, the second deflector 14 is located on the light-emitting side of the first deflector 13, and the second lens 121, the first deflector 13, the second deflector 14, and the second sensing unit 22 are arranged sequentially along the light path transmission direction.

[0095] For example, such as Figure 3 As shown, the second deflector 14 is located on the light-emitting side of the first lens 111, and the first lens 111, the second deflector 14, and the first sensing unit 21 are arranged sequentially along the light path transmission direction. The second deflector 14 is located on the light-emitting side of the second lens 121, and the second lens 121, the second deflector 14, and the second sensing unit 22 are arranged sequentially along the light path transmission direction.

[0096] For example, such as Figure 2The second deflector 14 has a wedge-shaped cross-section. By adjusting the wedge angle d and the placement angle e of the second deflector 14, the angle of the emitted light can be adjusted, thereby adapting and adjusting the principal ray angle of the lens and the principal ray angle of the sensing unit.

[0097] For example, the wedge angle d can be between 20° and 45°, such as 20°, 25°, 30°, 35°, 40°, and 45°. The placement angle e can be between 40° and 50°, such as 40°, 41°, 42°, 43°, 44°, 45°, 46°, 47°, 48°, 49°, and 50°. This satisfies the need for adaptive adjustment between the principal light angle of the lens and the principal light angle of the sensing unit.

[0098] In some embodiments, continue to refer to Figures 1 to 3 As shown, the first lens 111 has a first lens element 1111, and the second lens 121 has a second lens element 1211. The first lens element 1111 is located on the light-emitting side of the first lens 111 and has a focal length of the first lens element 1111. The second lens element 1211 is located on the light-emitting side of the second lens 121 and has a focal length of the second lens element 1211, satisfying: 0 < focal length of the first lens element 1111 / focal length of the second lens element 1211 ≤ 1.

[0099] In this embodiment, 0 < focal length of the first lens 1111 / focal length of the second lens 1211 ≤ 1, which is beneficial for the imaging area of ​​the optical components to be concentrated on the corresponding sensing part, and also beneficial for adjusting the principal ray angle of the lens to match the principal ray angle of the sensing part.

[0100] For example, such as Figure 1 and Figure 2 As shown, when the optical component is equipped with the first deflection device 13, by setting the value of "first lens 1111 focal length / second lens 1211 focal length" to be greater than 0 and less than or equal to 1, the light collection effect of the optical component is better, that is, it is beneficial for the imaging area of ​​the optical component to be concentrated on the corresponding sensing part.

[0101] For example, the value of "first lens 1111 focal length / second lens 1211 focal length" can be 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, or 1.

[0102] In some embodiments, the first lens 111 has a first back focal length, satisfying: 10mm ≤ first back focal length ≤ 30mm; and / or the second lens 121 has a second back focal length, satisfying: 10mm ≤ second back focal length ≤ 30mm.

[0103] In this embodiment, the lenses (e.g., the first lens 111 and / or the second lens 121) employ a relatively long back focal length, which facilitates the spatial feasibility of the optical path refraction. Simultaneously, it helps suppress stray light.

[0104] For example, the back focal length (BFL) is the distance from the vertex of the last optical surface in the lens to the rear focal point. Lenses (such as telephoto and / or short focal length lenses) increase the spatial feasibility of the imaging device by increasing the back focal length and by refraction of the optical path.

[0105] For example, such as Figure 1 As shown, by setting the second back focal length between 10mm and 30mm, it is possible to avoid light reflecting back and forth between the image sensor 2 (i.e., the second sensing unit 22) and the first deflection device 13, thereby avoiding the generation of stray light.

[0106] For example, such as Figure 1 and Figure 2 As shown, the second lens 121 is a telephoto lens, and the second back focal length is set between 10mm and 30mm, which is beneficial to the arrangement between the first deflection device 13 and the image sensor 2 and increases the space feasibility.

[0107] In some embodiments, in conjunction with reference Figure 6 As shown, the principal ray of the central field of view of the first lens 111 has a first incident point A1 on the first deflection device 13 and a first sensing point B1 on the first sensing unit 21. There is a first distance D1 between the first incident point A1 and the first sensing point B1, satisfying: 0.58 < first distance D1 / first back focal length < 1; and / or, the principal ray of the central field of view of the second lens 121 has a second incident point A2 on the first deflection device 13 and a second sensing point B2 on the second sensing unit 22. There is a second distance D2 between the second incident point A2 and the second sensing point B2, satisfying: 0.58 < second distance D2 / second back focal length < 1.

[0108] In this embodiment, "0.58 < first distance D1 / first back focal length < 1" and / or "0.58 < second distance D2 / second back focal length < 1" helps to reduce the possibility of stray light and crosstalk caused by edge field of view light from the lens (e.g., the first lens 111 and / or the second lens 121) near the sensing unit (e.g., the first sensing unit 21 and / or the second sensing unit 22).

[0109] Exemplarily, the value of "the first distance D1 / the first back focal length" can be 0.6, 0.65, 0.7, 0.75, 0.8, 0.85, 0.9, 0.95. The value of "the second distance D2 / the second back focal length" can be 0.6, 0.65, 0.7, 0.75, 0.8, 0.85, 0.9, 0.95.

[0110] In some embodiments, continuing to refer to Figure 3 as shown, the first lens 111 has a first field angle a, the second lens 121 has a second field angle b, and there is an overlapping field angle c between the first lens 111 and the second lens 121, satisfying: 0.3 < c / (a + b) < 0.5.

[0111] In this embodiment, 0.3 < c / (a + b) < 0.5 can avoid wasting the field angle of each lens due to an overly large overlapping field angle c, and can also avoid crosstalk to the image sensor 2 (for example, avoid double images and unclear imaging in the overlapping area).

[0112] Exemplarily, the value of "c / (a + b)" can be 0.35, 0.4, 0.45.

[0113] Exemplarily, as Figure 1 [[ID=十六]]as shown, the first optical axis Z1 is parallel to the normal line N, the second optical axis Z2 is perpendicular to the normal line N, and the first optical axis Z1 is perpendicular to the second optical axis Z2. The first lens 111 directly forms an image using the first sensing portion 21, and the first lens 111 is a short - focus lens, which can achieve near - scene imaging. The second lens 121 deflects the optical path using the first deflection device 13 and forms an image using the second sensing portion 22. The second lens 121 is a long - focus lens, which can effectively capture the far - scene area and achieve telephoto imaging.

[0114] Exemplarily, as Figure 1 shown, considering that the deflection degree of the short - focus light rays is small, the first optical axis Z1 is parallel to the normal line N without adapting the chief ray angle, which can reduce costs, without a deflection device, and reduce the design difficulty. The first deflection device 13 deflects the optical path and adapts the chief ray angle of the second lens 121 to the chief ray angle of the second sensing portion 22.

[0115] Exemplarily, as Figure 2 shown, the first lens 111 uses a short - focus lens and directly forms an image using the first sensing portion 21. By adjusting the intersection of the first optical axis Z1 and the normal line N, the adaptation of the chief ray angle of the first lens 111 to the chief ray angle of the first sensing portion 21 is achieved. The second lens 121 uses a long - focus lens, deflects the optical path through the first deflection device 13 and the second deflection device 14, and forms an image using the second sensing portion 22, achieving the adaptation of the chief ray angle of the second lens 121 to the chief ray angle of the second sensing portion 22.

[0116] For example, such as Figure 3 As shown, both the first lens 111 and the second lens 121 are telephoto lenses (e.g., the first focal length is equal to the second focal length). The light path is refracted by the second deflection device 14, which realizes the adaptation of the principal light angle of the first lens 111 to the principal light angle of the first sensing unit 21, and the adaptation of the principal light angle of the second lens 121 to the principal light angle of the second sensing unit 22.

[0117] For example, such as Figure 3 As shown, both the first optical axis Z1 and the second optical axis Z2 intersect the normal N, thus achieving the adaptation of the principal ray angle of the first lens 111 with the principal ray angle of the first sensing unit 21, and the adaptation of the principal ray angle of the second lens 121 with the principal ray angle of the second sensing unit 22. The first optical axis Z1 intersects the second optical axis Z2, and the angle between the first optical axis Z1 and the second optical axis Z2 is between 10° and 40°, for example, 10°, 20°, 30°, and 40°.

[0118] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0119] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0120] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0121] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. An imaging device, characterized in that, include: An optical system (1) includes a first optical component (11) and a second optical component (12), wherein the first optical component (11) includes a first lens (111) and the second optical component (12) includes a second lens (121); The image sensor (2) includes a first sensing unit (21) and a second sensing unit (22). The first sensing unit (21) is used to sense the emitted light of the first optical component (11), and the second sensing unit (22) is used to sense the emitted light of the second optical component (12). Wherein, the principal ray angle of the first lens (111) is adapted to the principal ray angle of the first sensing unit (21), and / or the principal ray angle of the second lens (121) is adapted to the principal ray angle of the second sensing unit (22).

2. The imaging device as claimed in claim 1, characterized in that, The principal ray angle of the first sensing unit (21) is configured to have a non-Gaussian distribution; and / or, The main ray angle of the second sensing unit (22) is configured as a non-Gaussian distribution.

3. The imaging device as claimed in claim 1, characterized in that, The first sensing unit (21) and the second sensing unit (22) are disposed opposite to each other; or, The first sensing unit (21) is located on the periphery of the second sensing unit (22).

4. The imaging apparatus as claimed in claim 1, characterized in that, The first lens (111) has a first focal length and the second lens (121) has a second focal length, satisfying: 0.6 < first focal length / second focal length ≤ 1.

5. The imaging apparatus as claimed in claim 1, characterized in that, The image sensor (2) has a normal (N), the first lens (111) has a first optical axis (Z1), and the second lens (121) has a second optical axis (Z2), at least one of the first optical axis (Z1) and the second optical axis (Z2) intersects the normal (N).

6. The imaging apparatus as claimed in claim 1, characterized in that, The first optical component (11) includes a first deflector (13) located on the light-emitting side of the first lens (111) and configured to reflect the light emitted from the first lens (111); and / or, The second optical component (12) includes a first deflector (13) located on the light-emitting side of the second lens (121) and configured to reflect the light emitted from the second lens (121).

7. The imaging apparatus as claimed in claim 1, characterized in that, The first optical component (11) includes a second deflector (14) located on the light-incident side of the first sensing unit (21) and configured to transmit incident light to the first sensing unit (21); and / or, The second optical component (12) includes a second deflection device (14), which is located on the light-incident side of the second sensing unit (22) and is configured to transmit incident light to the second sensing unit (22).

8. The imaging apparatus as claimed in claim 1, characterized in that, The first lens (111) has a first lens element (1111), and the second lens (121) has a second lens element (1211). The first lens element (1111) is located on the light-emitting side of the first lens (111) and has a first lens focal length. The second lens element (1211) is located on the light-emitting side of the second lens (121) and has a second lens focal length, satisfying: 0 < first lens focal length / second lens focal length ≤ 1.

9. The imaging apparatus as claimed in claim 1, characterized in that, The first lens (111) has a first back focal length, satisfying: 10mm ≤ first back focal length ≤ 30mm; and / or, The second lens (121) has a second back focal length, which satisfies: 10mm ≤ second back focal length ≤ 30mm.

10. The imaging apparatus as claimed in claim 1, characterized in that, The first optical component (11) includes a first deflector (13), the first lens (111) has a first back focal length, the principal ray of the central field of view of the first lens (111) has a first incident point (A1) on the first deflector (13), and a first sensing point (B1) on the first sensing unit (21), and a first distance (D1) between the first incident point (A1) and the first sensing point (B1), satisfying: 0.58 < first distance (D1) / first back focal length < 1; and / or, The second optical component (12) includes a first deflection device (13), the second lens (121) has a second back focal length, the principal ray of the central field of view of the second lens (121) has a second incident point (A2) on the first deflection device (13), and has a second sensing point (B2) on the second sensing unit (22), and has a second distance (D2) between the second incident point (A2) and the second sensing point (B2), satisfying: 0.58 < second distance (D2) / second back focal length < 1.

11. The imaging apparatus as claimed in claim 1, characterized in that, The first lens (111) has a first field of view (a), the second lens (121) has a second field of view (b), and the first lens (111) and the second lens (121) have an overlapping field of view (c), satisfying: 0.3 <c / (a+b)<0.5。

Images