阅读说明：本技术 一种三维相机及3d探测设备 (Three-dimensional camera and 3D detection equipment ) 是由 崔尧 沈志强 于 2020-12-11 设计创作，主要内容包括：本申请涉及3D探测领域技术领域,公开了一种三维相机及3D探测设备,所述三维相机包括：镜头元件、感光元件及滤光元件,所示滤光元件的半带宽大于0nm且小于30nm,所述滤光元件、所述镜头元件及所述感光元件依次布置,或者,所述镜头元件、所述滤光元件及所述感光元件依次布置。本申请通过设置滤光元件,滤光元件的半带宽大于0nm且小于30nm,滤光元件、镜头元件及感光元件依次设置,或者,镜头元件、滤光元件及感光元件依次设置,以降低自然光干扰,大幅提高信噪比,从而提高三维相机的成像质量。(The application relates to the technical field of 3D detection, and discloses a three-dimensional camera and 3D detection equipment, the three-dimensional camera includes: the semi-bandwidth of the filter element is greater than 0nm and less than 30nm, the filter element, the lens element and the photosensitive element are sequentially arranged, or the lens element, the filter element and the photosensitive element are sequentially arranged. This application is through setting up filtering element, and filtering element's half bandwidth is greater than 0nm and is less than 30nm, and filtering element, lens element and photosensitive element set gradually, perhaps, lens element, filtering element and photosensitive element set gradually to reduce the natural light interference, improve the SNR by a wide margin, thereby improve three-dimensional camera's imaging quality.)

1. A three-dimensional camera, comprising: a lens element, a photosensitive element and a filter element, wherein the half bandwidth of the filter element is more than 0nm and less than 30nm,

the light filtering element, the lens element and the photosensitive element are sequentially arranged, or the lens element, the light filtering element and the photosensitive element are sequentially arranged.

2. The three-dimensional camera according to claim 1, wherein the filter element, the lens element, and the light sensing element are arranged in this order, and the filter element is connected to the lens element.

3. The three-dimensional camera according to claim 2, further comprising a connection assembly through which the filter element is connected to the lens element.

4. The three-dimensional camera according to claim 2, wherein the lens element is a plano-convex lens, a planar portion of the plano-convex lens facing the filter element, the filter element being connected to the planar portion.

5. The three-dimensional camera according to claim 2, further comprising a convex lens element disposed between the lens element and the light sensing element.

6. The three-dimensional camera according to claim 1, wherein the lens element, the filter element, and the light sensing element are arranged in this order, the filter element being connected to the light sensing element.

7. The three-dimensional camera according to claim 6, further comprising a convex lens element disposed between the lens element and the filter element.

8. A3D detection device characterized by comprising a three-dimensional camera according to any one of claims 1 to 7.

9. The 3D detection device according to claim 8, further comprising a light source emitting arrangement comprising several sections, each of said sections emitting light in sequence.

10. The 3D detection device according to claim 8, characterized in that the light source emitting means emits polarized light or partially polarized light, the polarization direction of the polarized light being one or more.

Technical Field

The invention relates to the technical field of 3D detection, in particular to a three-dimensional camera and 3D detection equipment.

Background

Conventional 2D imaging devices, such as cameras, can only acquire planar information of an object; the 3D imaging device can also acquire depth information of an object and construct a three-dimensional 3D model, so that the 3D imaging device is widely applied to the fields of industrial measurement, part modeling, medical diagnosis, security monitoring, machine vision, biological recognition, augmented reality AR, virtual reality VR and the like, and has great application value.

In the related art, the camera used in the non-contact optically active 3D imaging device is an infrared camera, which can filter out visible light, but since the half bandwidth (generally above 30 nm) is still wide compared with the half bandwidth (generally within 1 nm) of the emitted light, in the outdoor situation, a large amount of stray interference light still enters the camera to cause imaging failure.

Disclosure of Invention

In view of the above-mentioned drawbacks or deficiencies in the prior art, it is desirable to provide a three-dimensional camera and a 3D detection apparatus.

The present invention provides a three-dimensional camera, including: a lens element, a photosensitive element and a filter element, wherein the half bandwidth of the filter element is more than 0nm and less than 30nm,

the light filtering element, the lens element and the photosensitive element are sequentially arranged, or the lens element, the light filtering element and the photosensitive element are sequentially arranged.

As an achievable optimum, the filter element, the lens element, and the light-sensing element are arranged in this order, and the filter element is connected to the lens element.

As an implementable optimum, the optical lens further comprises a connecting component through which the filter element is connected to the lens element.

As an implementable optimum, the lens element is a plano-convex lens, a planar portion of the plano-convex lens facing the filter element, the filter element being connected to the planar portion.

As an achievable optimum mode, the optical lens further comprises a convex lens element, and the convex lens element is arranged between the lens element and the photosensitive element.

As an achievable optimum, the lens element, the filter element, and the photosensitive element are arranged in this order, and the filter element is connected to the photosensitive element.

As an achievable optimum mode, the optical lens further comprises a convex lens element, and the convex lens element is arranged between the lens element and the filter element.

The invention also provides 3D detection equipment comprising the three-dimensional camera.

As an achievable optimum, the device also comprises a light source emitting device which comprises a plurality of parts, and each part sequentially emits light.

As an optimal way to realize, the light source emitting device emits polarized light or partially polarized light, and the polarization direction of the polarized light is one or more.

Compared with the prior art, the invention has the beneficial effects that:

according to the scheme, the filtering element is arranged, the half bandwidth of the filtering element is larger than 0nm and smaller than 30nm, the filtering element, the lens element and the photosensitive element are sequentially arranged, or the lens element, the filtering element and the photosensitive element are sequentially arranged, so that natural light interference is reduced, the signal to noise ratio is greatly improved, and the imaging quality of the three-dimensional camera is improved; the filter element is connected to the lens element through the connecting assembly, the lens element is a plano-convex lens, the filter element is pasted on the plane part of the plano-convex lens, or the filter element is connected to the photosensitive element, and the filter element is fixed; the arrangement of the convex lens element is beneficial to improving the imaging effect of the three-dimensional camera.

Drawings

Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:

FIG. 1 is a schematic block diagram of a TOF detection apparatus according to an embodiment of the present application;

FIG. 2 is a schematic diagram of a structure of a structured light detection apparatus according to an embodiment of the present application;

FIG. 3 is a schematic structural diagram of a first three-dimensional camera according to an embodiment of the present application;

FIG. 4 is a schematic structural diagram of a second three-dimensional camera according to an embodiment of the present application;

FIG. 5 is a schematic structural diagram of a third three-dimensional camera according to an embodiment of the present application;

FIG. 6 is a schematic structural diagram of a fourth three-dimensional camera according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of a fifth three-dimensional camera according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of a sixth three-dimensional camera according to an embodiment of the present application;

fig. 9 is a schematic structural diagram of a seventh three-dimensional camera according to an embodiment of the present application;

fig. 10 is a schematic structural diagram of an eighth three-dimensional camera according to an embodiment of the present application.

Detailed Description

The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

A three-dimensional camera includes a lens element 11, a light sensing element 12, and a filter element 13. The light receiving element 12 is used to convert the optical image generated by the lens element 11 into an electrical signal, and after a/D (analog-to-digital) conversion, the electrical signal becomes digital image information. The filter element 13 is used to allow the optical signal to pass through in a specific wavelength band, while the optical signal is blocked from both sides outside this wavelength band, and the half bandwidth of the filter element 13 is greater than 0nm and less than 30 nm. The three-dimensional camera may be a structured light camera 10B, or may be a TOF (time of light) camera, such as a dTOF camera 10A, a pulse TOF camera 10A, an i TOF camera 10A, or a spot TOF camera 10A. The light sensing element 12 corresponding to the structured light camera 10B is a first light sensing element, and the light sensing element 12 corresponding to the TOF camera 10A is a second light sensing element.

In an embodiment, the filter element 13, the lens element 11 and the photosensitive element 12 are sequentially disposed to reduce natural light interference and greatly improve the signal-to-noise ratio, thereby improving the imaging quality of the three-dimensional camera; in another embodiment, the lens element 11, the filter element 13 and the light sensing element 12 are sequentially disposed to reduce interference of natural light and greatly improve the signal-to-noise ratio, thereby improving the imaging quality of the three-dimensional camera.

In some preferred embodiments, the filter element 13, the lens element 11, and the photosensitive element 12 are sequentially disposed, and the filter element 13 is connected to the lens element 11.

In the present embodiment, the three-dimensional camera includes a housing 15, a lens element 11, a photosensitive element 12, and a filter element 13. The filter element 13, the lens element 11 and the photosensitive element 12 are sequentially arranged, the filter element 13 is arranged outside the shell 15, the lens element 11 is clamped on the shell 15, the photosensitive element 12 is arranged in the shell 15, and the filter element 13 is connected to the lens element 11.

The filter element 13 is connected to the lens element 11, specifically:

as shown in fig. 3, the three-dimensional camera further includes a connecting assembly 14, and the filter element 13 is connected to the lens element 11 through the connecting assembly 14. The connecting component 14 is disposed outside the housing 15 at a side of the housing 15 where the lens element 11 is clamped. The connecting assembly 14 includes a connecting frame 141 and a connecting member 142, the connecting member 142 is connected to the connecting frame 141, the connecting member 142 is made of transparent glass, and the connecting frame 141 is fixedly connected to the lens element 11 in a detachable manner. The lens element 11 is a lenticular lens, the filter element 13 is a filter film, and the filter element 13 is adhered to the connecting element 142, so that the filter element 13 is fixedly connected to the lens element 11.

Alternatively, as shown in fig. 5, the lens element 11 is a plano-convex lens, and the planar portion of the plano-convex lens faces the filter element 13. The filter element 13 is a filter film, and the filter element 13 is adhered to the plane part, so that the filter element 13 is fixedly connected to the lens element 11, and the whole volume of the three-dimensional camera is reduced.

Further, the three-dimensional camera further includes a convex lens element 16, and the convex lens element 16 is disposed between the lens element 11 and the photosensitive element 12.

As shown in fig. 4, in the present embodiment, the three-dimensional camera includes a housing 15, a lens element 11, a photosensitive element 12, a filter element 13, a connecting component 14, and a convex lens element 16. The filter element 13, the lens element 11, the convex lens element 16 and the photosensitive element 12 are sequentially arranged, the filter element 13 and the connecting component 14 are arranged outside the shell 15, the lens element 11 is clamped in the shell 15, the photosensitive element 12 is arranged in the shell 15, and the filter element 13 is connected to the lens element 11 through the connecting component 14. The lens element 11 is a lenticular lens, the convex lens element 16 is a lenticular lens, and the type of the lens element 11 is the same as that of the convex lens element 16.

As shown in fig. 6, in the present embodiment, the three-dimensional camera includes a housing 15, a lens element 11, a light sensing element 12, a filter element 13, and a convex lens element 16. The filter element 13, the lens element 11, the convex lens element 16 and the photosensitive element 12 are sequentially arranged, the filter element 13 is arranged outside the shell 15, the lens element 11 is clamped in the shell 15, and the convex lens element 16 and the photosensitive element 12 are arranged in the shell 15. The lens element 11 is a plano-convex lens, the planar portion of which faces the filter element 13. The filter element 13 is a filter film, and the filter element 13 is attached to the above-mentioned planar portion. The convex lens element 16 is a plano-convex lens having a plane portion facing the filter element 13, and the type of the convex lens element 16 is the same as that of the lens element 11.

The arrangement of the convex lens element 16 is beneficial to improving the imaging effect of the three-dimensional camera.

In some preferred embodiments, the lens element 11, the filter element 13, and the photosensitive element 12 are sequentially arranged, and the filter element 13 is connected to the photosensitive element 12.

As shown in fig. 7 or 9, in the present embodiment, the three-dimensional camera includes a housing 15, a lens element 11, a photosensitive element 12, and a filter element 13. The lens element 11, the filter element 13 and the photosensitive element 12 are sequentially arranged, the lens element 11 is clamped in the shell 15, the filter element 13 and the photosensitive element 12 are arranged in the shell 15, the filter element 13 is a filter film, and the filter element 13 is adhered to the surface, facing the filter element 13, of the photosensitive element 12, so that the filter element 13 is fixed. The lens element 11 may be a lenticular lens or a plano-convex lens, if the lens element 11 is a plano-convex lens, the planar portion of the plano-convex lens faces away from the filter element 13.

Further, the three-dimensional camera further includes a convex lens element 16, and the convex lens element 16 is disposed between the lens element 11 and the filter element 13.

As shown in fig. 8, in the present embodiment, the three-dimensional camera includes a housing 15, a lens element 11, a light sensing element 12, a filter element 13, and a convex lens element 16. The lens element 11, the convex lens element 16, the filter element 13 and the photosensitive element 12 are sequentially arranged, the lens element 11 is clamped in the shell 15, the filter element 13, the convex lens element 16 and the photosensitive element 12 are arranged in the shell 15, the filter element 13 is a filter film, and the filter element 13 is adhered to the surface, facing the filter element 13, of the photosensitive element 12. The lens element 11 is a lenticular lens, the convex lens element 16 is a lenticular lens, and the type of the lens element 11 is the same as that of the convex lens element 16.

As shown in fig. 10, in the present embodiment, the three-dimensional camera includes a housing 15, a lens element 11, a light sensing element 12, a filter element 13, and a convex lens element 16. The lens element 11, the convex lens element 16, the filter element 13 and the photosensitive element 12 are sequentially arranged, the lens element 11 is clamped in the shell 15, the filter element 13, the convex lens element 16 and the photosensitive element 12 are arranged in the shell 15, the filter element 13 is a filter film, and the filter element 13 is adhered to the surface, facing the filter element 13, of the photosensitive element 12. The lens element 11 is a plano-convex lens and the convex lens element 16 is a plano-convex lens, the type of the lens element 11 being the same as the type of the convex lens element 16. The planar portion of the lens element 11 and the planar portion of the convex lens element 16 both face away from the filter element 13.

The arrangement of the convex lens element 16 is beneficial to improving the imaging effect of the three-dimensional camera.

The application also provides a 3D detection device, which includes a light source emitting device 20, a driving circuit module 30 and the three-dimensional camera. The three-dimensional camera includes a TOF camera 10A and a structured light camera 10B.

Fig. 1 shows a schematic structural diagram of a TOF detection apparatus, which includes a light source emitting device 20, a driving circuit module 30 and a TOF camera 10A, where the TOF camera 10A is an i-TOF camera 10A. The TOF camera 10A includes a lens element 11, a first photosensitive element and a filter element 13, where the filter element 13, the lens element 11 and the first photosensitive element are sequentially disposed, or the lens element 11, the filter element 13 and the first photosensitive element are sequentially disposed, so as to reduce interference of natural light and greatly improve a signal-to-noise ratio.

The TOF camera 10A and the light source emitting device 20 are disposed at a distance and both located at the same side of the driving circuit module 30, so that the light emitted by the light source emitting device 20 enters the TOF camera 10A after being reflected.

Fig. 2 shows a schematic structural diagram of a structured light detection apparatus, where the structured light detection apparatus includes a light source emitting device 20, a driving circuit module 30, and a structured light camera 10B, the structured light camera 10B includes a lens element 11, a second photosensitive element, and a filter element 13, and the filter element 13, the lens element 11, and the second photosensitive element are sequentially disposed, or the lens element 11, the filter element 13, and the second photosensitive element 12 are sequentially disposed, so as to reduce natural light interference and greatly improve a signal-to-noise ratio.

The structured light camera 10B and the light source emitting device 20 are disposed at an interval and both located at the same side of the driving circuit module 30, so that the light emitted by the light source emitting device 20 enters the structured light camera 10B after being reflected.

In some preferred embodiments, the light source emitting device 20 may employ a vertical cavity surface laser (VCSEL), such as a High Contrast Grating (HCG) VCSEL or a Distributed Bragg Reflector (DBR) VCSEL; edge-emitting lasers (EELs); light Emitting Diodes (LEDs).

In some preferred embodiments, the light source emitting device 20 includes a plurality of portions, and each portion sequentially emits light, which is beneficial to reduce the operating temperature of the light source emitting device 20, and avoids that the 3D detection apparatus cannot operate normally due to an excessively high temperature of the light source emitting device 20.

In some preferred embodiments, the light source emitting device 20 can emit polarized light and also can emit partial polarized light, so as to improve the interference resistance of the 3D detection device, which is beneficial to improving the imaging effect of the 3D detection device.

Further, when the light source emitting device 20 emits polarized light, the polarized light in one polarization direction may be emitted, and the polarized light in multiple polarization directions may also be emitted, so as to further improve the anti-interference capability of the 3D detection device.

The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by those skilled in the art that the scope of the disclosure herein is not limited to the particular combination of features described above, but also encompasses other arrangements formed by any combination of the above features or their equivalents without departing from the spirit of the disclosure. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.