Three-dimensional image acquisition system

Abstract

The application discloses a three-dimensional image acquisition system. The three-dimensional image acquisition system comprises a detector, a light guide layer and a light selection layer. The light guide layer comprises opposite light inlet and light outlet. The three-dimensional image acquisition system of the application sets the detector, the light guide layer and the light selection layer, the detector is arranged opposite to the light outlet of the light guide layer, the light selection layer is arranged at the light inlet of the light guide layer, the incident light rays of different areas are selected by the light selection layer to enter the light guide layer in sequence, the incident light rays enter the detector to form an image after reflection and diffraction in the light guide layer, thus, the same object is observed by multiple viewpoints, the detector performs three-dimensional imaging on different perspectives of the same object, the imaging is simple and efficient, the number of detectors is effectively reduced, the cost of the three-dimensional image acquisition system is reduced, the occupied area of the detector is reduced, and the three-dimensional image acquisition system is more beautiful.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of image acquisition, and in particular to a three-dimensional image acquisition system. BACKGROUND

[0002] With the development of technology and the increasing demand of end customers for product quality, 3D vision detection adds height information data on the basis of 2D data, and can meet the needs of measuring height, volume, shape, etc. Therefore, 3D detection technology is more and more favored by industrial enterprises. It has important significance and wide application prospects in the fields of industrial production control and sensing detection, machine vision, space remote sensing, medical diagnosis, and social security. For 3D display, 3D vision detection is equivalent to its inverse process. The three-dimensional coordinate information of an object in a real space can be obtained through 3D vision detection, processed by a computer to generate a three-dimensional picture, and then transmitted to a 3D display device for display.

[0003] In related technologies, 3D vision detection technology can be implemented through multiple light field cameras. Different position picture information is collected through the light field cameras to generate digital signals for 3D display. However, on the one hand, due to the limitation of physical spacing, the distance between two light field cameras cannot be too small. The picture at the position between the cameras can only be generated through algorithm calculation and interpolation, which requires a large amount of calculation and is not accurate enough. On the other hand, too many light field cameras are needed, which not only occupies a large area on the upper end of the screen, affecting the appearance, but also increases the cost. SUMMARY

[0004] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides a three-dimensional image acquisition system.

[0005] The present application provides a three-dimensional image acquisition system, which comprises:

[0006] a detector;

[0007] a light guide layer, the light guide layer comprising opposite light inlet and light outlet, the light outlet being arranged opposite to the detector; and

[0008] a light selection layer, the light selection layer being located at the light inlet, the light selection layer being configured to select incident light rays from different regions from the light inlet into the light guide layer in sequence, so that the incident light rays are emitted from the light outlet to the detector.

[0009] The three-dimensional image acquisition system of the present application sets a detector, a light guide layer and a light selection layer, the detector is set opposite to the light outlet of the light guide layer, the light selection layer is set at the light inlet of the light guide layer, the incident light rays of different regions are selected by the light selection layer to enter the light guide layer in turn, the incident light rays enter the detector to form an image after reflection and diffraction in the light guide layer, thus, the same object is observed from multiple viewpoints, the detector performs three-dimensional imaging of different perspectives of the same object, the imaging is simple and efficient, the number of detectors is effectively reduced, the cost of the three-dimensional image acquisition system is reduced, the occupied area of the detector is reduced, and the three-dimensional image acquisition system is more beautiful.

[0010] In some embodiments, the light guide layer comprises:

[0011] a coupling-in structure located on a side close to the light inlet;

[0012] a coupling-out structure located on a side close to the light outlet;

[0013] The incident light rays are reflected or diffracted from the coupling-in structure to the coupling-out structure and transmitted to the detector by the coupling-out structure.

[0014] In some embodiments, the coupling-in structure and the coupling-out structure are arranged along a first direction, and the extension direction of the coupling-in structure forms an angle with the first direction.

[0015] In some embodiments, the coupling-in structure comprises a glass material.

[0016] In some embodiments, the coupling-in structure and the coupling-out structure are arranged along a second direction, and the extension direction of the coupling-in structure is parallel to the second direction, and the second direction is perpendicular to the first direction.

[0017] In some embodiments, the coupling-in structure comprises a plurality of coupling-in structures arranged along the first direction.

[0018] In some embodiments, the coupling-in structure and the coupling-out structure comprise an optical fiber material.

[0019] In some embodiments, the coupling-in structure and the coupling-out structure are arranged along the extension direction of the light selection layer.

[0020] In some embodiments, the coupling-in structure and the coupling-out structure comprise an electrorefractive index change material.

[0021] In some embodiments, the detector comprises a plurality of detectors arranged side by side and spaced apart.

[0022] In certain embodiments, the light selection layer comprises an electro- refractive index change material.

[0023] Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following and / or by practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0024] The above and / or additional aspects and advantages of the application will become apparent and be well understood from the description of the embodiments, given below, when taken in conjunction with the accompanying drawings.

[0025] Figure 1 is a structural schematic diagram of a three-dimensional image acquisition system according to an embodiment of the application;

[0026] Figure 2 is a structural schematic diagram of a three-dimensional image acquisition system according to another embodiment of the application;

[0027] Figure 3 is a structural schematic diagram of a three-dimensional image acquisition system according to another embodiment of the application;

[0028] Figure 4 is a structural schematic diagram of a three-dimensional image acquisition system according to another embodiment of the application.

[0029] Explanation of main element symbols:

[0030] Three-dimensional image acquisition system 100, probe 10, light guide layer 20, light inlet 21, light outlet 22, coupling-in structure 23, coupling-out structure 24, fiber structure 25, light selection layer 30, liquid crystal switch 31. DETAILED DESCRIPTION

[0031] Embodiments of the application are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals are used to represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below are exemplary only, and are used only for the purpose of explaining the present application, and should not be understood as limiting the present application.

[0032] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, 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 indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0033] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0034] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0035] The disclosure that follows provides many different embodiments, or examples, for implementing different structures of the application. For the purpose of simplicity, the elements and settings of the various examples are described in the following disclosure. Of course, they are merely examples and are not intended to limit the application in any manner. Furthermore, the application can employ additional components, and / or different combinations of the described components, in different examples.

[0036] Referring now to the drawings Figure 1 The application provides a three-dimensional image acquisition system 100, which comprises a detector 10, a light guide layer 20 and a light selection layer 30.

[0037] Specifically, the detector 10 can acquire images and image, for example, the detector 10 can be a camera, an image sensor, etc., the detector 10 can include multiple, multiple detectors 10 are arranged side by side at intervals, each detector 10 is responsible for image acquisition of a region, the application takes one detector 10 as an example, the specific number of detectors 10 can be configured according to the image acquisition range, which is not limited here.

[0038] The light guide layer 20 comprises opposite light inlet 21 and light outlet 22, the light outlet 22 is arranged opposite to the detector 10, the light enters the light guide layer 20 through the light inlet 21, and is reflected and diffracted in the light guide layer 20, when the light encounters the light outlet 22, the light is emitted from the light outlet 22, the detector 10 acquires the light and images. The light selection layer 30 is arranged at the light inlet 21 of the light guide layer 20, the light selection layer 30 can be made of an electrorefractive material, for example, liquid crystal, the electrorefractive material changes the refractive index under the conditions of power on and power off. The light selection layer 30 is used to select incident light of different regions from the light inlet 21 into the light guide layer 20 in turn, so that the incident light is emitted from the light outlet 22 to the detector 10, and imaged by the detector 10.

[0039] Further, the light selection layer 30 is provided with a liquid crystal switch 31, by controlling the liquid crystal switch 31, incident light of different regions can be selected to enter the light guide layer 20 through the light inlet 21, the incident light is reflected or diffracted in the light guide layer 20, when the incident light is reflected or diffracted to the light outlet 22, the incident light is emitted from the light guide layer 20 through the light outlet 22 into the detector 10, and the detector 10 images according to the incident light.

[0040] The three-dimensional image acquisition system 100 of the present application sets the detector 10, the light guide layer 20 and the light selection layer 30, the detector 10 is opposite to the light outlet 22 of the light guide layer 20, the light selection layer 30 is arranged at the light inlet 21 of the light guide layer 20, the incident light rays of different regions are selected by the light selection layer 30 to enter the light guide layer 20 in turn, the incident light rays enter the detector 10 for imaging after being reflected or diffracted in the light guide layer 20, in this way, the same object is observed from multiple viewpoints, so that the detector 10 performs three-dimensional imaging of different perspectives of the same object, the imaging is simple and efficient, the number of detectors 10 is effectively reduced, the cost of the three-dimensional image acquisition system 100 is reduced, the occupied area of the detector 10 is reduced, and the three-dimensional image acquisition system 100 is more beautiful.

[0041] Please refer to Figures 2-4 In some embodiments, the light guide layer 20 includes the coupling-in structure 23 and the coupling-out structure 24.

[0042] Specifically, the coupling-in structure 23 and the coupling-out structure 24 are arranged in the light guide layer 20, the coupling-in structure 23 can be made of glass material, the coupling-in structure 23 is located near the light inlet 21, the coupling-out structure 24 is located near the light outlet 22, the coupling-in structure 23 is used for reflecting or diffracting the incident light rays of the light inlet 21 towards the coupling-out structure 24, and the coupling-out structure 24 is used for transmitting the incident light rays to the detector 10 through the light outlet 22, so that the detector 10 receives the incident light rays for imaging.

[0043] In this way, the light guide layer 20 can reflect or diffract the incident light rays of the light inlet 21 to the coupling-out structure 24 through the coupling-in structure 23, and the coupling-out structure 24 transmits the incident light rays to the detector 10 through the light outlet 22 and performs imaging, realizing the waveguide mode of the light propagation of the light guide layer 20.

[0044] Please further refer to Figure 2 In some embodiments, the coupling-in structure 23 and the coupling-out structure 24 are arranged along the first direction, the extension direction of the coupling-in structure 23 forms an angle with the first direction, and the coupling-out structure 24 is perpendicular to the first direction, by controlling the liquid crystal switch 31 of the light selection layer 30, the incident light rays at different positions in the first direction can be sequentially made to enter the coupling-in structure 23, the coupling-in structure 23 reflects or diffracts the incident light rays at different positions to the coupling-out structure 24 respectively, and the coupling-out structure 24 transmits the incident light rays to the detector 10.

[0045] Thus, by tilting the coupling-in structure 23 to form an angle with the first direction and controlling the liquid crystal switch 31 of the light selection layer 30, the incident light rays at different positions in the first direction can be transmitted to the coupling-in structure 23, and meanwhile, the light energy and information loss caused by the incident light rays encountering the coupling-in structure 23 during the propagation in the light guide layer can be avoided. Then, the incident light rays are transmitted to the detector 10 for imaging through the propagation of the coupling-out structure 24, so as to realize the observation of the same object through multiple viewpoints, and the three-dimensional imaging of the same object by the detector 10 at different perspectives, effectively reducing the number of detectors 10 and the cost of the three-dimensional image acquisition system 100.

[0046] Please refer to Figure 3 In some embodiments, the coupling-in structures 23 and the coupling-out structures 24 are arranged along a second direction, and the extension direction of the coupling-in structures 23 is parallel to the second direction, and the second direction is perpendicular to the first direction.

[0047] Specifically, the coupling-in structures 23 include a plurality of coupling-in structures 23 arranged along the first direction, the coupling-in structures 23 are arranged parallel to the second direction, the light guide layer 20 further includes a fiber structure 25 arranged perpendicular to the second direction, and the coupling-in structures 23 and the coupling-out structures 24 are arranged perpendicularly on both sides of the fiber structure 25, respectively. The coupling-in structures 23 and the coupling-out structures 24 can be made of fiber materials, and the energy loss during the transmission of the light rays in the fiber is small.

[0048] Further, by controlling the liquid crystal switch 31 of the light selection layer 30, the light rays can be irradiated to the surface of the coupling-in structure 23 through the light selection layer 30 and coupled into the fiber structure 25, and the light rays are transmitted to the detector 10 through the coupling-out structure 24 during the transmission in the fiber structure 25, and then received and imaged by the detector 10.

[0049] It should be noted that the coupling-out structure 24 is preferably arranged at the middle position of the fiber structure 25, and the incident light rays transmitted by all the coupling-in structures 23 are reflected in the fiber structure 25 to the coupling-out structure 24 at the middle of the fiber structure 25, and then transmitted to the detector 10 for imaging by the coupling-out structure 24. Thus, the reflection distance of the incident light rays in the light guide layer 20 is shortened, the light energy and information loss of the incident light rays are reduced, and the imaging quality is improved.

[0050] Thus, by arranging the coupling-in structures 23 and the coupling-out structure 24 along the second direction and providing a plurality of coupling-in structures 23, the plurality of coupling-in structures 23 can guide the light rays in a plurality of regions to one detector 10 for imaging. The light rays are irradiated to the coupling-in structures 23 through the light selection layer 30, the coupling-in structures 23 couple the light rays into the optical fiber structure 25, reducing the energy loss in the transmission of the light rays, the light rays in the optical fiber structure 25 are transmitted to the detector 10 through the coupling-out structure 24 and imaged, realizing the observation of the same object through a plurality of viewpoints, enabling the detector 10 to perform three-dimensional imaging of different perspectives of the same object, reducing the number of detectors 10, and reducing the cost of the three-dimensional image acquisition system 100.

[0051] Please refer to Figure 4 In some embodiments, the coupling-in structures 23 and the coupling-out structure 24 are arranged in an array along the extension direction of the light selection layer 30.

[0052] Specifically, the coupling-in structures 23 and the coupling-out structure 24 are arranged obliquely in the light guide layer 20, the coupling-in structures 23 can be a plurality of, and the coupling-out structure 24 can be one. The coupling-in structures 23 and the coupling-out structure 24 can be made of an electrorefractive material, and the refractive index of the coupling-in structures 23 and the coupling-out structure 24 can be changed by controlling the on-off of the coupling-in structures 23 and the coupling-out structure 24.

[0053] Further, the plurality of coupling-in structures 23 and the coupling-out structure 24 are arranged at intervals, the incident light rays can be irradiated to any position of the light guide layer 20 by controlling the liquid crystal switch 31 of the light selection layer 30, at this time, the corresponding coupling-in structure 23 forms a reflecting surface by controlling the refractive index of the corresponding coupling-in structure 23 corresponding to the position of the incident light rays, and the other coupling-in structures 23 are transparently arranged, the corresponding coupling-in structure 23 reflects the incident light rays towards the coupling-out structure 24, and the coupling-out structure 24 reflects the incident light rays to the detector 10 for imaging.

[0054] Thus, by arranging the plurality of coupling-in structures 23 and the coupling-out structure 24 obliquely in the light guide layer 20, and making the coupling-in structures 23 and the coupling-out structure 24 of an electrorefractive material, the incident light rays can be irradiated to any position of the light guide layer 20 by controlling the refractive index of the light selection layer 30 and the coupling-in structures 23, and the incident light rays at any position of the light guide layer 20 can be reflected to the coupling-out structure 24 and transmitted to the detector 10 for imaging by the coupling-out structure 24, realizing the observation of the same object through a plurality of viewpoints, enabling the detector 10 to perform three-dimensional imaging of different perspectives of the same object, reducing the number of detectors 10, and reducing the cost of the three-dimensional image acquisition system 100.

[0055] In the description of the specification, reference to "one embodiment", "certain embodiments", "some embodiments", "exemplary embodiments", "a specific example", or "some examples" etc., mean that a particular feature, structure, material, or characteristic being described is included in at least one embodiment or example of the application. The appearances of the above expressions in various places in the specification are not necessarily referring to the same embodiment or example. Moreover, describing a particular feature, structure, material, or characteristic as included in an embodiment or example is intended to convey that the particular feature, structure, material, or characteristic is included in at least one embodiment or example of the application. Thus, appearances of the expressions "in one embodiment" or "in an embodiment" are not necessarily referring to the same embodiment.

[0056] Although the embodiments of the present application have been shown and described, it would be appreciated by those skilled in the art that changes, modifications, alternatives and variations to these embodiments could be made without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.

Claims

1. A three-dimensional image acquisition system, characterized by The three-dimensional image acquisition system comprises: a detector; a light guide layer comprising a light inlet and a light outlet opposite to each other, the light outlet being arranged opposite to the detector; and a light selection layer arranged at the light inlet, the light selection layer comprising an electrorefractive material, the light selection layer being configured to select incident light rays from different regions of a same object at different viewing angles to enter the light guide layer from the light inlet by changing the refractive index, so that the incident light rays are emitted from the light outlet to the detector.

2. The three-dimensional image acquisition system of claim 1, wherein, The light guide layer comprises: a coupling-in structure arranged at a side close to the light inlet; a coupling-out structure arranged at a side close to the light outlet; the incident light rays are emitted from the light inlet to the coupling-in structure and reflected or diffracted to the coupling-out structure, and transmitted from the coupling-out structure to the detector.

3. The three-dimensional image acquisition system of claim 2, wherein, The coupling-in structure and the coupling-out structure are arranged along a first direction, and an extension direction of the coupling-in structure forms an angle with the first direction.

4. The three-dimensional image acquisition system of claim 3, wherein, The coupling-in structure comprises glass material.

5. The three-dimensional image acquisition system of claim 2, wherein, The coupling-in structure and the coupling-out structure are arranged along a second direction, and an extension direction of the coupling-in structure is parallel to the second direction, and the second direction is perpendicular to the first direction.

6. The three-dimensional image acquisition system of claim 5, wherein, The coupling-in structure comprises a plurality of coupling-in structures arranged along the first direction.

7. The three-dimensional image acquisition system of claim 6, wherein, The coupling-in structure and the coupling-out structure comprise optical fiber material.

8. The three-dimensional image acquisition system of claim 2, wherein, The coupling-in structure and the coupling-out structure are arranged along an extension direction of the light selection layer.

9. The three-dimensional image acquisition system of claim 8, wherein, The coupling-in structure and the coupling-out structure comprise electrorefractive material.

10. The three-dimensional image acquisition system of claim 1, wherein, The detector comprises a plurality of detectors arranged side by side and spaced apart.

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