CN215006043U - Optical system, optical lens and TOF camera module - Google Patents
Optical system, optical lens and TOF camera module Download PDFInfo
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- CN215006043U CN215006043U CN202120236305.8U CN202120236305U CN215006043U CN 215006043 U CN215006043 U CN 215006043U CN 202120236305 U CN202120236305 U CN 202120236305U CN 215006043 U CN215006043 U CN 215006043U
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Abstract
An optical system, an optical lens and a TOF camera module are disclosed, wherein the optical system comprises at least one optical lens, and at least one part of the optical area of the optical lens along the longitudinal extension direction of the optical lens is removed to form at least one non-reflective optical lens. Accordingly, a portion of the non-reflective optical lens that does not participate in light convergence is removed, so that the non-reflective optical lens has a relatively small size, and thus the size of the optical lens can be reduced. And by introducing the non-reflection type optical lens, in the process that the imaging light passes through the optical system of the optical lens, the reflection of the imaging light between the optical lenses and between the light incident surface and the light emergent surface of each optical lens is reduced, so that the signal loss generated when the imaging light passes through the optical lens can be effectively reduced, and the image resolving power of the optical system and the optical lens is relatively improved.
Description
Technical Field
The present application relates to the field of optical design, and more particularly, to an optical system, an optical lens, and a TOF camera module having the optical lens.
Background
With the popularization of mobile terminal devices, related technologies of camera modules applied to mobile terminal devices have been rapidly developed and advanced, and in recent years, camera modules have been widely applied in various fields such as medical treatment, security, industrial production, and the like.
For mobile terminal devices (e.g., sweeping robots, autonomous vehicles, smart phones, etc.), the camera module is equivalent to the "eye" of the mobile terminal device, which provides the necessary visual data for the mobile terminal device. For example, the sweeping robot is configured with a camera module (e.g., a TOF camera module) having a function of collecting depth information, so as to perform path planning and obstacle avoidance decisions through an image with depth information collected by the camera module.
It can be understood that, corresponding to the mobile terminal device in different application scenes, it has different demands to the image that the module of making a video recording gathered and the module of making a video recording self structure. For example, in an application scenario where the sweeping robot is located, the camera module configured in the sweeping robot at least needs to meet the following technical requirements: having a large angle of view in the horizontal direction (typically greater than 100 °), a relatively small angle of view in the vertical direction (typically less than 10 °), having a relatively high depth measurement accuracy, and the like. In order to meet the above technical requirements, the optical design of the optical lens of the camera module is particularly critical.
The optical lens of the camera module generally includes at least one optical lens, which may be made of glass or plastic, and its surface shape is usually spherical or aspherical. The optical parameters of the optical lens are determined according to the applied scene, for example, when the optical lens is applied to a robot for sweeping the floor, the adopted optical lens needs to satisfy the following conditions: the device has the parameter requirements of larger angle of view in the horizontal direction, relatively smaller angle of view in the vertical direction, relatively higher resolution and the like.
However, the optical lens design of the existing optical lens cannot well meet the technical requirements of the application scenarios, and in the specific application, the problems of too heavy stray light influence, low depth distance calculation accuracy, large size and the like occur.
Therefore, an optimized optical system design for an optical lens is desired so that it can meet the technical requirements of a specific application scenario.
Disclosure of Invention
An advantage of the present application is to provide an optical system, an optical lens and a TOF camera module, wherein the optical system for the optical lens includes a plurality of optical lenses, at least a portion of an optical area of at least one of the plurality of optical lenses along a longitudinal extension thereof is removed to form at least one non-reflective optical lens.
Another advantage of the present application is to provide an optical system, an optical lens and a TOF camera module, wherein a portion of the non-reflective optical lens not involved in light convergence is removed, so that the non-reflective optical lens has a relatively small size, and thus the size of the optical lens can be reduced.
Still another advantage of the present application is to provide an optical system, an optical lens, and a TOF camera module, wherein by introducing the non-reflective optical lens, reflection of imaging light rays between the respective optical lenses and between the light incident surface and the light emitting surface of each optical lens is reduced during transmission of the imaging light rays through the optical system of the optical lens, so that signal loss of the imaging light rays occurring while passing through the optical lens can be effectively reduced to relatively improve the resolving power of the optical system and the optical lens.
It is a further advantage of the present application to provide an optical system, an optical lens and a TOF camera module in which the non-reflective optical lens can be manufactured by removing a portion of an existing optical lens, that is, the non-reflective optical lens can be obtained by modifying the existing optical lens.
To achieve at least one of the above advantages or other advantages and objects, according to one aspect of the present application, there is provided an optical system, comprising: a plurality of optical lenses, each of the plurality of optical lenses having an optical zone provided with a longitudinal extension direction and a transverse extension direction perpendicular to the longitudinal extension direction;
wherein at least a portion of the optical zone of at least one of said optical lenses of said plurality of optical lenses along its longitudinal extension is removed to form at least one non-reflective optical lens.
In an optical system according to the application, the length of the optical region of the non-reflective optical lens in its longitudinal extension is smaller than the length of the optical region in its lateral extension.
In an optical system according to the present application, the shape of the cross section of the non-reflective optical lens is elongated.
In an optical system according to the present application, the optical system has an object side and an image side opposite to the object side, wherein the optical lens closest to the object side among the plurality of optical lenses is a non-reflective optical lens.
In an optical system according to the present application, all of the optical lenses of the plurality of optical lenses are non-reflective optical lenses.
In the optical system according to the present application, the non-reflective optical lens has a light incident surface and a light emergent surface opposite to the light incident surface, wherein when imaging light from the outside enters the non-reflective optical lens of the optical system, no imaging light is reflected between the light incident surface and the light emergent surface.
In an optical system according to the application, the non-reflective optical lens is formed by cutting away at least a part of the optical area of the optical lens along its longitudinal extension.
According to another aspect of the present application, there is also provided an optical lens including:
an optical system as described above; and
a lens barrel in which the optical system is housed.
According to still another aspect of the present application, there is also provided a TOF camera module, including:
a projection unit configured to project a detection signal to a subject; and
a photosensitive receiving unit comprising: a light sensing element configured to receive a detection signal reflected from the subject, a filter element held on a light sensing path of the light sensing element, and an optical lens held on a light sensing path of the light sensing element;
wherein, the optical lens includes:
an optical system as described above; and
a lens barrel in which the optical system is housed.
In the TOF camera module according to the present application, the detection signal forms an imaging region on the photosensitive element after passing through the optical lens and the filter element, the imaging region having an elongated shape.
In the TOF camera module according to the application, the photosensitive element comprises a pixel array arranged in an array mode, and the imaging area is located in the middle area of the pixel array.
In the TOF camera module according to the application, the length dimension of the imaging area corresponds to the length dimension of the pixel array, and the width dimension of the imaging area is smaller than the width dimension of the pixel array.
In the TOF camera module according to the application, the width size of the imaging area is a size formed by 10-30 pixels.
Further objects and advantages of the present application will become apparent from an understanding of the ensuing description and drawings.
These and other objects, features and advantages of the present application will become more fully apparent from the following detailed description, the accompanying drawings and the claims.
Drawings
Fig. 1 illustrates a schematic diagram of the propagation of imaging light through a conventional optical lens.
FIG. 2 illustrates a schematic diagram of an optical system according to an embodiment of the present application.
FIG. 3 illustrates a schematic diagram of a non-reflective optical lens of the optical system according to an embodiment of the application.
FIG. 4 illustrates a schematic diagram of one fabrication process for the non-reflective optical lens according to an embodiment of the present application.
Fig. 5 illustrates a schematic diagram of an optical lens according to an embodiment of the present application.
Fig. 6 illustrates a schematic diagram of a TOF camera module according to an embodiment of the application.
Fig. 7 illustrates a front view of the TOF camera module according to an embodiment of the application.
Fig. 8 illustrates an imaging schematic diagram of a photosensitive receiving unit of the TOF camera module according to an embodiment of the present application.
Detailed Description
The following description is presented to disclose the application and to enable any person skilled in the art to practice the application. The embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The underlying principles of the application, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the application.
Summary of the application
As described above, the parameter design of the camera module depends on the application scenario of the mobile terminal device. To meet the parameter design requirement, the optical design of the optical lens of the camera module is particularly critical.
The optical parameters of the optical lens are determined according to the applied scene, for example, when the optical lens is applied to a robot for sweeping the floor, the adopted optical lens needs to satisfy the following conditions: the angle of view in the horizontal direction is large, the angle of view in the vertical direction is relatively small, and the resolution is relatively high.
However, the optical lens design of the existing optical lens cannot well meet the technical requirements of the application scenarios, and in the specific application, the problems of too heavy stray light influence, low depth distance calculation accuracy, large size and the like occur.
As will be appreciated by those skilled in the art, the optical lens of the camera module generally includes at least one optical lens 1P, and the optical lens 1P may be made of glass or plastic. However, no matter glass material or plastic material is adopted, the light transmittance of the optical lens 1P cannot reach 100%, and therefore, as shown in fig. 1, in the process of the imaging light passing through the optical lens, there exists light reflection between the optical lens 1P and between the light incident surface and the light emergent surface of each optical lens 1P, which not only results in loss of effective light signals, but also the reflected light signals are superimposed with normal light signals after reaching the photosensitive element, which affects the measurement accuracy of the depth information. That is, in the process of the imaging light passing through the existing optical lens, the existence of the reflected light signal may bring stray light, which affects the measurement accuracy of the depth information.
Also, as shown in fig. 1, in the existing optical lens, the optical lens 1P has a conventional shape configuration, i.e. has a complete face-type structure, which results in a relatively large size of the optical lens, which is not favorable for applying the optical lens to a camera module for a sweeping robot.
Based on this, the inventors of the present application have developed and found that: for the optical lens 1P, it has an optical region 10P and a non-optical region 11P, wherein the optical region 10P is used for modulating (e.g., converging) the imaging light, and the non-optical region 11P mainly plays a role of structural support. However, both the non-optical region 11P and the optical region 10P are made of a light-permeable material, and therefore, if there are excess portions in the optical lens 1P, these excess portions will reflect or refract the imaging light to cause attenuation of the effective optical signal and formation of stray light contamination.
Some manufacturers have recognized the influence of the unwanted portion in the optical lens 1P on the performance thereof, but they have mainly considered that the unwanted portion in the optical lens 1P is a non-optical portion of the optical lens 1P, and therefore some manufacturers have tried to cut off a portion of the non-optical region 11P in the optical lens 1P to reduce the influence of the portion of the non-optical region 11P on the performance thereof. However, the effect obtained by this practice is generally because, in the case of the conventional optical lens 1P, the non-optical region 11P itself occupies only a small part of the entire area of the optical lens 1P, and the portion of the non-optical region 11P that can be cut off is almost negligible in order to retain the structural support effect of the non-optical region 11P.
In the technical scenario corresponding to the present application, the inventors of the present application have found through research that, for being applied to a technical scenario with similar characteristics, such as a sweeping robot, the redundant portion in the optical lens 1P exists not only in the non-optical area 11P thereof but also in the optical area 10P thereof, and more specifically, in the optical area 11P thereof, the portion corresponding to the vertical field angle.
Based on this, the present inventors tried to remove at least a portion corresponding to the vertical field angle in the optical area of the optical lens to more sufficiently remove the portions of the optical lens that do not participate in the actual imaging, so as to prevent the portions that do not participate in the actual imaging from affecting the performance of the optical lens on the one hand, and to reduce the size of the optical lens on the other hand so that the size of the optical lens can be reduced.
Based on this, the present application proposes an optical system comprising: a plurality of optical lenses, each of the plurality of optical lenses having an optical zone provided with a longitudinal extension direction and a transverse extension direction perpendicular to the longitudinal extension direction; wherein at least a portion of the optical zone of at least one of said optical lenses of said plurality of optical lenses along its longitudinal extension is removed to form at least one non-reflective optical lens.
Based on this, the present application also provides an optical lens, which includes the optical system as described above, and a lens barrel for accommodating the optical system therein.
Based on this, the present application also proposes a TOF camera module, which includes a projection unit configured to project a detection signal to a subject; and, a photosensitive receiving unit including: the optical system comprises a photosensitive element configured to receive a detection signal reflected from the photographic subject, a filter element held on a photosensitive path of the photosensitive element, and an optical lens held on the photosensitive path of the photosensitive element. Wherein, the optical lens includes: an optical system as described above and a lens barrel for housing the optical system therein.
Having described the general principles of the present application, various non-limiting embodiments of the present application will now be described with reference to the accompanying drawings.
Exemplary optical System
FIG. 2 illustrates a schematic diagram of an optical system according to an embodiment of the present application. As shown in fig. 2, the optical system according to the embodiment of the present application is an optical system 10 for an optical lens, which includes a plurality of optical lenses 11 arranged in a predetermined order, where the predetermined order is an order preset by the optical system 10 at the time of optical design.
In the embodiment of the present application, each optical lens 11 of the plurality of optical lenses 11 has an optical area 110. To facilitate the description of the optical area 110, a coordinate system is established for the optical area 110, and more specifically, in the embodiment of the present application, the optical area 110 is provided with a longitudinal extending direction Y and a transverse extending direction X perpendicular to the longitudinal extending direction Y, where the longitudinal extending direction Y corresponds to a vertical viewing angle portion of the optical lens 11, and the transverse extending portion corresponds to a horizontal viewing angle portion of the optical lens 11.
In particular, in the present embodiment, at least a portion of the optical area 110 of at least one of said optical lenses 11 of said plurality of optical lenses 11 along the longitudinal extension Y thereof is removed to form at least one non-reflective optical lens 11, as shown in fig. 3.
As described above, if there are unwanted portions in the optical lens 11, these unwanted portions will reflect the imaging light to cause attenuation of the effective optical signal and form stray light contamination. Some manufacturers are aware of the influence of the extra portion of the optical lens 11 on the performance thereof, but mainly consider the extra portion of the optical lens 11 as a non-optical portion of the optical lens 11, and therefore some manufacturers try to cut off a portion of the non-optical area of the optical lens 11 to reduce the influence of the non-optical area portion on the performance thereof. However, the reason why this practice generally achieves the effect in practical applications is that, in the case of the conventional optical lens 11, the non-optical region itself occupies only a small portion of the entire area of the optical lens 11, and the portion of the non-optical region that can be cut off is almost negligible in order to maintain the structural support effect of the non-optical region.
Accordingly, in the technical solution of the present application, in a technical scenario where the optical lens is applied to a robot with similar characteristics, such as a sweeping robot, the redundant portion in the optical lens 11 exists not only in the non-optical region thereof, but also in the optical region 110 thereof. Therefore, in the solution of the present application, at least a portion of the optical area 110 of the optical lens 11 along the longitudinal extension direction Y thereof is removed to form at least one non-reflective optical lens 111.
It should be understood that in the optical design of the non-reflective optical lens 111, as the portion of the optical region 110 of the optical lens 11 along the longitudinal extension direction Y thereof is gradually removed, the portion of the middle of the optical lens 11 that does not participate in the actual imaging is gradually reduced, i.e. the portion of the optical lens 11 that participates in the reflection is gradually reduced. When a certain threshold value is reached, the part of the optical area 110 of the optical lens 11 not participating in imaging is completely removed, so as to remove the part participating in reflection in the optical lens 11 to the maximum extent, so as to optimize the imaging performance of the optical lens 11.
It should be noted that in the technical solution of the present application, the "non-reflective optical lens 111" does not mean that the portion participating in reflection in the optical lens 11 is completely removed, but only means that the optical lens 11 has less portion participating in reflection compared to the existing optical lens 11 so as to have relatively better resolution.
It should be noted that, as shown in fig. 3, in the non-reflective optical lens 111, the non-optical region is not disposed in the longitudinal extension direction Y of the optical region 110, and the non-optical region is disposed only on the side of the lateral extension direction X of the optical region 110. As shown in fig. 3, in the embodiment of the present application, the shape of the cross section of the non-reflective optical lens 111 is an elongated shape, that is, the length dimension of the cross section of the non-reflective optical lens 111 is much larger than the width dimension of the cross section, so that the cross section has an elongated shape.
Also, in the present embodiment, the length of the optical region 110 of the non-reflective optical lens 111 in the longitudinal extension direction Y thereof is smaller than the length of the optical region 110 in the transverse extension direction X thereof, so that the optical lens 11 has a relatively large angle of view in the horizontal direction thereof and a relatively small angle of view in the vertical direction thereof.
Further, it should be understood that the optical system 10 is provided with an object side and an image side opposite to the object side, wherein the object side represents a side corresponding to a subject, and the image side represents a side forming an imaging region. In a specific example of the present application, the optical lens 11 closest to the object side among the plurality of optical lenses 11 is a non-reflective optical lens 111. That is, in this specific example, the optical lens 11 closest to the subject in the optical system 10 is the non-reflective optical lens 111. It should be understood that in a general optical system 10, the optical lens 11 most adjacent to the object forms the light incident surface of the whole optical system 10, and therefore, when the optical lens 11 most adjacent to the object is configured as the non-reflective optical lens 111, it can constrain and limit the imaging light rays when the imaging light rays enter the optical system 10, so as to improve the imaging performance of the whole optical system 10.
Preferably, in the technical solution of the present application, all the optical lenses 11 in the plurality of optical lenses 11 are non-reflective optical lenses 111. Of course, in a specific implementation, at least two optical lenses 11 of the plurality of optical lenses 11 may be configured as the non-reflective optical lens 111, and the other optical lenses 11 may be configured as the conventional optical lens 11, which is not limited by this application.
Further, in order to avoid the stray light from entering the optical lens 11 from the longitudinal extending direction Y of the non-reflective optical lens 111, in some examples of the present application, the non-reflective optical lens 111 further includes a light shielding layer 112 disposed on the upper and lower sides thereof, for example, an ink layer for shielding light is formed on the upper and lower sides thereof through a spraying process.
In summary, the optical system 10 according to the embodiment of the present application is illustrated, wherein the optical system 10 comprises at least one optical lens 11, wherein at least a portion of the optical region 110 of the optical lens 11 along the longitudinal extension direction Y thereof is removed to form at least one non-reflective optical lens 111. Accordingly, a portion of the non-reflective optical lens 111 that does not participate in light convergence is removed, so that the non-reflective optical lens 111 has a relatively small size, and thus the size of the optical lens can be reduced. Moreover, by introducing the non-reflective optical lens 111, in the process that the imaging light passes through the optical system 10 of the optical lens, the reflection of the imaging light between the optical lenses 11 and between the light incident surface and the light emergent surface of each optical lens 11 is reduced, so that the signal loss of the imaging light when passing through the optical lens can be effectively reduced, and the resolving power of the optical system 10 and the optical lens can be relatively improved.
In a specific implementation, the non-reflective optical lens 111 is not limited in the present application, and may be formed integrally by an injection molding process or a molding process, or may be formed by removing a portion of the existing optical lens 11, that is, the non-reflective optical lens 111 may be obtained by modifying the existing optical lens 11, for example, removing a portion of the existing optical lens 11 by a laser cutting process to obtain the non-reflective optical lens 111, as shown in fig. 4.
Exemplary optical lens
According to another aspect of the present application, there is also provided an optical lens 20.
Fig. 5 illustrates a schematic diagram of an optical lens 20 according to an embodiment of the present application.
As shown in fig. 5, the optical lens 20 according to the embodiment of the present application includes: the optical system 10 and the lens barrel 21 as described above, wherein the optical system 10 is accommodated in the lens barrel 21.
Here, in the embodiment of the present application, the description about the optical system 10 is sufficiently explained in the exemplary optical system 10 as described above, and thus is not particularly expanded here.
In particular, in the present embodiment, the optical lens 20 may be implemented as an integral optical lens, that is, the optical lens 20 includes only one lens barrel 21, and all of the plurality of optical lenses 11 of the optical system 10 are mounted in the lens barrel 21. Of course, in other examples of the present application, the optical lens 20 may also be implemented as a split-type optical lens, that is, the optical lens 20 includes at least two lens barrels, which is not limited by the present application.
Exemplary TOF Camera Module
According to still another aspect of the application, a TOF camera module is further provided.
Fig. 6 illustrates a schematic diagram of a TOF camera module according to an embodiment of the application.
As shown in fig. 6, the TOF camera module 30 according to the embodiment of the present application includes: the device comprises a projection unit 31 and a photosensitive receiving unit 32, wherein the projection unit 31 is used for projecting a detection signal to a shot object, and the photosensitive receiving unit 32 is used for receiving the detection signal reflected by the shot object so as to measure the depth information of the shot object based on the time flight law.
In the embodiment of the present application, the photosensitive receiving unit 32 includes: a light sensing element 321 configured to receive a detection signal reflected from the subject, a filter element 322 held on a light sensing path of the light sensing element 321, and an optical lens 20 held on a light sensing path of the light sensing element, wherein the optical lens 20 includes: as described above with respect to the optical system 10 and the lens barrel 21, the optical system 10 is accommodated in the lens barrel 21.
In particular, in the embodiment of the present application, due to the special configuration of the optical system 10 and the optical lens 20, the optical lens 20 has an elongated structure, and therefore, the optical lens 20 is easily integrated in the TOF camera module 30, as shown in fig. 7.
In particular, in the embodiment of the present application, due to the special configuration of the optical system 10 and the optical lens 20, the detection signal projected by the projection unit 31 forms an imaging region 320 on the light sensing element 321 after passing through the optical lens 20 and the filter element 322, and the imaging region 320 has an elongated shape, as shown in fig. 8.
In the embodiment of the present application, the photosensitive element 321 includes a pixel array arranged in an array manner, and the imaging region 320 is located in a middle region of the pixel array, as shown in fig. 8. In particular, the length dimension of the imaging region 320 corresponds to the length dimension of the pixel array, and the width dimension of the imaging region 320 is smaller than the width dimension of the pixel array. More specifically, in the embodiment of the present application, the width dimension of the imaging region 320 is a dimension formed by 10 to 30 pixels. That is, in the embodiment of the present application, the light sensing element 321 of the TOF camera module 30 is a middle effective pixel portion in an area array sensor. Of course, in other examples of the present application, the photosensitive element 321 may also be a line pixel, and this is not limited in the present application.
In a specific example of the present application, the projection unit 31 includes a laser emitting array, which can be used to emit a laser signal having a specific pattern, for example, a stripe-shaped laser spot can be emitted. Of course, the projection unit 31 may further include other necessary electronic components, such as a metal shield, an optical diffraction element, a circuit board, and the like.
In summary, the TOF camera module 30 according to the embodiment of the present disclosure is clarified, which uses the optical system 10 and the optical lens 20 as described above to enable performance parameters thereof to meet technical requirements of a specific application scenario, and since it has relatively high depth measurement accuracy, it can improve the accuracy of obstacle avoidance of the sweeping robot when it is applied to the sweeping robot.
Claims (15)
1. An optical system, comprising: a plurality of optical lenses, each of the plurality of optical lenses having an optical zone provided with a longitudinal extension direction and a transverse extension direction perpendicular to the longitudinal extension direction;
wherein at least a portion of the optical zone of at least one of said optical lenses of said plurality of optical lenses along its longitudinal extension is removed to form at least one non-reflective optical lens.
2. The optical system according to claim 1, wherein the length of said optical region of said non-reflective optical lens in its longitudinal extension is smaller than the length of said optical region in its lateral extension.
3. The optical system according to claim 2, wherein the non-reflective optical lens is elongate in shape in cross-section.
4. The optical system according to claim 1, wherein the optical system has an object side and an image side opposite to the object side, and wherein the optical lens of the plurality of optical lenses closest to the object side is a non-reflective optical lens.
5. The optical system of claim 4, wherein all of the optical lenses of the plurality of optical lenses are non-reflective optical lenses.
6. The optical system according to claim 1, wherein the non-reflective optical lens has a light exit surface opposite to the light entrance surface, wherein when imaging light rays from the outside enter the non-reflective optical lens of the optical system, no imaging light rays are reflected between the light entrance surface and the light exit surface.
7. The optical system according to claim 6, wherein the non-reflective optical lens comprises light shielding layers disposed on upper and lower sides thereof.
8. The optical system according to claim 1, wherein the non-reflective optical lens is formed by cutting away at least a portion of an optical area of the optical lens along its longitudinal extension.
9. The optical system of claim 1, wherein the non-reflective optical lens is integrally molded by an injection molding process.
10. An optical lens, comprising:
an optical system as claimed in any one of claims 1 to 9; and
a lens barrel in which the optical system is housed.
11. The utility model provides a module is made a video recording to TOF which characterized in that includes:
a projection unit configured to project a detection signal to a subject; and
a photosensitive receiving unit comprising: a light sensing element configured to receive a detection signal reflected from the subject, a filter element held on a light sensing path of the light sensing element, and an optical lens held on a light sensing path of the light sensing element;
wherein, the optical lens includes:
an optical system as claimed in any one of claims 1 to 9; and
a lens barrel in which the optical system is housed.
12. The TOF camera module of claim 11, wherein the detection signal forms an imaging area on the photosensitive element after passing through the optical lens and the filter element, the imaging area having an elongated shape.
13. The TOF camera module of claim 12, wherein the photosensitive element comprises an array of pixels arranged in an array, the imaging region being located in a middle region of the array of pixels.
14. The TOF camera module of claim 13, wherein a length dimension of the imaging region corresponds to a length dimension of the pixel array, and a width dimension of the imaging region is less than a width dimension of the pixel array.
15. The TOF camera module of claim 14 wherein the width dimension of the imaging region is a dimension formed by 10-30 pixels.
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| CN202120236305.8U CN215006043U (en) | 2021-01-27 | 2021-01-27 | Optical system, optical lens and TOF camera module |
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| CN202120236305.8U CN215006043U (en) | 2021-01-27 | 2021-01-27 | Optical system, optical lens and TOF camera module |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114942510A (en) * | 2022-02-11 | 2022-08-26 | 深圳市都乐精密制造有限公司 | Ultra-thin wide angle robot lens of sweeping floor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114942510A (en) * | 2022-02-11 | 2022-08-26 | 深圳市都乐精密制造有限公司 | Ultra-thin wide angle robot lens of sweeping floor |
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