Lens three-dimensional contour reconstruction device and method

Abstract

The invention relates to a lens three-dimensional contour reconstruction device and method, and the method comprises the steps: obtaining a surface image of a lens through a photographing module, extracting the edge contour information of the lens according to the surface image, obtaining the edge information of the lens through a curvature module, and obtaining the edge thickness of the lens and the boundary information of the front and rear surfaces according to the edge information. On the basis, the three-dimensional contour of the lens is obtained in a three-dimensional image construction mode by arranging the construction module and utilizing the edge contour information of the lens, the edge thickness of the lens and the boundary information of the front surface and the rear surface, and compared with the prior art, the efficiency and the speed are obviously improved.

Description

Technical Field

[0001] The present invention relates to the technical field of optical lens design, and in particular to a device and method for reconstructing the three-dimensional contour of a lens. Background Art

[0002] In the manufacturing or processing of lenses, in order to ensure that the lenses with the predetermined focal length or profile are accurately obtained, the three-dimensional profile of the processed lenses needs to be accurately known. The three-dimensional profile construction of the lens requires obtaining the peripheral shape of the lens and the curvature (curvature) of the front and back surfaces.

[0003] In order to construct the three-dimensional profile of the lens, the existing technology uses a mechanical contact scanning method to construct a three-dimensional image, but the mechanical scanning speed is slow, the mechanical failure rate is high, and the cost is high. Summary of the invention

[0004] The technical problem to be solved by the present invention is how to quickly and trouble-free construct a three-dimensional contour of a lens. To overcome the defects of the above-mentioned prior art, the present invention provides a three-dimensional contour reconstruction device and method for a lens, including a three-dimensional contour reconstruction device for a lens and a three-dimensional contour reconstruction method for a lens.

[0005] The present invention provides a lens three-dimensional contour reconstruction device, comprising:

[0006] A photographing module, which obtains a surface image of the lens by optical photographing, and extracts edge profile information of the lens according to the surface image;

[0007] A curvature module, which obtains edge information of the lens by optical rotation scanning, and then obtains edge thickness of the lens and boundary information of the front and rear surfaces according to the edge information;

[0008] A construction module, using the lens edge contour information and the lens edge thickness and the boundary information of the front and back surfaces to obtain the three-dimensional contour of the lens through a three-dimensional image construction method;

[0009] The construction module communicates with the photographing module and the curvature module respectively.

[0010] The lens stereoscopic contour reconstruction device disclosed in the present invention obtains the surface image of the lens by setting a camera module, extracts the lens edge contour information according to the surface image, obtains the edge information of the lens by setting a curvature module, and then obtains the edge thickness of the lens and the boundary information of the front and back surfaces according to the edge information. On this basis, the lens edge contour information and the lens edge thickness and the boundary information of the front and back surfaces are used by setting a construction module to obtain the lens stereoscopic contour by a three-dimensional image construction method. The device as a whole obtains the lens stereoscopic contour by combining the principles of optical image acquisition, image processing and three-dimensional image construction. Compared with the prior art, both efficiency and speed are significantly improved. Therefore, under the premise of respecting the physical properties of the lens, the technical defects of slow scanning speed, high mechanical failure rate and high cost in the prior art are overcome.

[0011] In a possible implementation, the camera module includes:

[0012] A light source, generating a photographing signal light;

[0013] A collection device, which converts the photographing signal light into a surface reflected signal light of the lens;

[0014] An imaging device receives image information of the signal light reflected from the surface and obtains an image of the surface;

[0015] A spectroscope, transmitting the photographing signal light into the collecting device; reflecting the surface reflected signal light into the imaging device;

[0016] An extraction device, which extracts lens edge contour information from the surface image using a contour extraction algorithm;

[0017] in,

[0018] The light source, the beam splitter, and the collection device are sequentially arranged along the propagation direction of the photographing signal light, and the collection device, the beam splitter, and the imaging device are sequentially arranged along the propagation direction of the surface reflected signal light;

[0019] The extraction device is electrically connected to the imaging device, and the construction module communicates with the extraction device;

[0020] The signal light generated by the light source is transmitted into the collection device through the beam splitter, and the collection device converts the signal light into the surface reflected signal light of the lens. The surface reflected signal light is reflected into the imaging device through the beam splitter. The imaging device obtains the surface image according to the image information of the surface reflected signal light. The surface image is transmitted to the extraction device, and finally the contour extraction algorithm is used to extract the edge contour information of the lens according to the surface image, thereby realizing the acquisition of the surface image of the lens and the edge contour information of the lens, saving costs and improving efficiency.

[0021] In a possible implementation manner, the acquisition device includes:

[0022] A focusing lens is used to collimate the photographing signal light and inject it into the lens; and to focus the surface reflected signal light formed by the lens into the beam splitter;

[0023] A sample stage for placing the lens;

[0024] A lens is placed on the sample stage. After the photographic signal light from the light source is emitted, the photographic signal light can be collimated and incident on the lens through the focusing lens. The lens therefore reflects the photographic signal light to form surface reflected signal light. The surface reflected signal light returns to the focusing lens and is focused into the beam splitter by the focusing lens.

[0025] In a possible implementation, the distance from the focusing lens to the sample stage is between 0.5 and 1 times the focal length of the focusing lens; this solution can effectively avoid the problem of redundant or unclear imaging information caused by excessive imaging, thereby ensuring image quality.

[0026] In a possible implementation, the imaging device includes an imaging lens and an image sensor sequentially arranged along the propagation direction of the surface reflected signal light; then, the surface reflected signal light is reflected by a beam splitter, received by the imaging lens and imaged on an image plane of the imaging lens, and finally received by the image sensor to obtain a surface image, thereby ensuring image information acquisition.

[0027] In a possible implementation, the beam splitter is a semi-reflective and semi-transmissive beam splitter, thereby ensuring a balance between reflection and transmission, and effectively taking into account both signal light irradiation of the lens and imaging collection.

[0028] In a possible implementation, the curvature module includes:

[0029] A lighting module generates lighting signal light;

[0030] A conversion module, which obtains edge information of the lens according to the edge reflected light of the lens, and then obtains edge thickness of the lens and boundary information of the front and rear surfaces according to the edge information;

[0031] A reflector, which reflects the illumination signal light into the edge of the lens, and reflects the edge reflected light generated by the edge of the lens into the conversion module;

[0032] A lifting and rotating device, which clamps the lens along the axial direction of the lens, places the lens on the propagation path of the illumination signal light, and rotates the lens along the axial direction of the lens and / or drives the lens to lift;

[0033] in,

[0034] The lighting module, the reflector, and the lifting and rotating device are sequentially arranged along the propagation direction of the lighting signal light, and the lifting and rotating device, the reflector, and the conversion module are sequentially arranged along the propagation direction of the edge reflected light;

[0035] The construction module communicates with the conversion module;

[0036] A lens is installed on the lifting and rotating device, and after the lighting module generates lighting signal light, the lighting signal light is reflected by the reflector. By adjusting the lifting and rotating device, the lighting signal light reflected by the reflector can be reflected by the edge of the lens, and the formed edge reflected light is reflected by the reflector into the conversion module. By controlling the lifting and rotating device to rotate the lens one circle, the conversion module can obtain the edge thickness of the lens and the boundary information of the front and back surfaces, so that the collection efficiency can be guaranteed and the accuracy or quality of the image can be guaranteed.

[0037] In a possible implementation, the conversion module includes:

[0038] An imaging lens barrel for imaging the edge of the lens according to the edge reflected light;

[0039] A photosensitive coupling component receives imaging information at the image plane of the imaging lens barrel and converts the imaging information into an edge image of the lens by photoelectric conversion;

[0040] A processing unit, which obtains the edge thickness of the lens and the boundary information of the front and back surfaces according to the edge image; the edge thickness of the lens and the boundary information of the front and back surfaces include the vertical coordinates of multiple groups of points with the same polar coordinates on the edge of the front and back surfaces of the lens in the lens edge image in a cylindrical coordinate system;

[0041] in,

[0042] The imaging lens barrel and the photosensitive coupling assembly are arranged in sequence along the propagation direction of the edge reflected light;

[0043] The processing unit is electrically connected to the photosensitive coupling assembly, and the building module communicates with the processing unit;

[0044] Furthermore, the edge reflected light is reflected by the reflector into the imaging lens barrel, and the imaging of the edge of the lens based on the edge reflected light can be acquired by the photosensitive coupling component, and the edge image is obtained after photoelectric conversion. The processing unit obtains the edge thickness of the lens and the boundary information of the front and back surfaces based on the edge image, thereby efficiently acquiring the edge information of the lens, further ensuring the construction of the three-dimensional structure and improving efficiency.

[0045] In a possible implementation manner, the construction module is configured to obtain the three-dimensional outline of the lens by executing the three-dimensional image construction method comprising the following steps:

[0046] A1: extracting the vertical coordinates of multiple pairs of points with the same polar coordinates on the edges of the front and back surfaces of the lens in the lens edge image from the lens edge thickness and the boundary information of the front and back surfaces;

[0047] A2: Find the positions of multiple pairs of points with the same polar coordinates in step A1 from the surface image, and obtain the polar coordinates of these points in the cylindrical coordinate system used by the processing unit;

[0048] A3: Based on the vertical coordinates and polar coordinates of the multiple pairs of points with the same polar coordinates, the cylindrical coordinates of these points are obtained, and the three-dimensional profile of the lens is obtained according to these cylindrical coordinates:

[0049] This solution obtains the three-dimensional contour of the lens by extracting the coordinates of the key points of the portrait. It has low computational complexity, low operating cost, and both efficiency and accuracy are guaranteed.

[0050] Another technical solution of the present invention is to provide a method for reconstructing the three-dimensional contour of a lens, comprising the following steps:

[0051] S1: acquiring a surface image of a lens through a camera module, and extracting edge contour information of the lens according to the surface image;

[0052] S2: obtaining edge information of the lens through a curvature module, and then obtaining edge thickness of the lens and boundary information of the front and rear surfaces according to the edge information;

[0053] S3: Using the lens edge contour information and the lens edge thickness and boundary information of the front and back surfaces through a construction module, a three-dimensional contour of the lens is obtained through a three-dimensional image construction method.

[0054] The lens stereoscopic contour reconstruction method disclosed in the present invention extracts lens edge contour information from the surface image based on the optical properties of the lens, obtains lens edge thickness and boundary information of the front and rear surfaces, and then finally constructs a three-dimensional contour based on these two pieces of information, which not only saves costs, but also is based on optical measurement rather than mechanical scanning, thereby significantly improving efficiency and speed. Thus, under the premise of respecting the physical properties of the lens, the technical defects of slow scanning speed, high mechanical failure rate and high cost in the prior art are overcome. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] Figure 1 It is a schematic structural diagram of a lens three-dimensional contour reconstruction device disclosed in an embodiment of the present invention;

[0056] Figure 2 Schematic diagram of the optical path structure of the camera module disclosed in the embodiment of the present invention;

[0057] Figure 3 It is a schematic diagram of the optical path structure of the curvature module disclosed in an embodiment of the present invention;

[0058] Figure 4 It is a flowchart of the operation of the building modules disclosed in the embodiment of the present invention;

[0059] Figure 5 are two groups of points with the same polar coordinates in the lens edge image disclosed in the embodiment of the present invention;

[0060] Figure 6 A schematic diagram of the positions of two groups of points having the same polar coordinates in the surface image in the lens edge image disclosed in an embodiment of the present invention;

[0061] Figure 7 A three-dimensional profile of a lens obtained in an embodiment of the present invention;

[0062] Figure 8 It is a flow chart of the method disclosed in the embodiment of the present invention.

[0063] Description of reference numerals:

[0064] 1. Photo module, 11. Light source, 12. Collection device, 121. Focusing lens, 122. Sample stage, 13. Imaging device, 131. Imaging lens, 132. Image sensor, 14. Spectroscope, 15. Extraction device, 2. Curvature module, 21. Illumination module, 22. Conversion module, 221. Imaging lens barrel, 222. Photosensitive coupling component, 223. Processing unit, 23. Reflector, 24. Lifting and rotating device, 3. Construction module, 4. Lens. DETAILED DESCRIPTION

[0065] First, those skilled in the art should understand that these implementations are only used to explain the technical principles of the embodiments of the present application, and are not intended to limit the protection scope of the embodiments of the present application. Those skilled in the art can make adjustments to them as needed to adapt to specific application scenarios.

[0066] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the technical terms "electrical connection" and "establishing an electrical connection relationship" should be understood in a broad sense, that is, it should be understood that two or more of them have an electrical relationship, which can be achieved through a wire, a wireless connection, or a combination of the two; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0067] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the term "forming a communication link structure" means that the multiple communication elements or modules involved form a network structure or a network link structure through communication connections, and communication or communication connection refers to the transmission of information between the first feature and the second feature. This information transmission can be either unidirectional or bidirectional, and the communication connection can be achieved by electrical connection of wires, radio connection, electrical connection of electromagnetic media (such as optical fibers, semiconductors), communication achieved by channels, etc.

[0068] In the embodiments of the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0069] The present application is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0070] See also Figure 1 to Figure 7 As shown, the embodiment of the present application discloses a lens stereoscopic contour reconstruction device, which includes a photographing module 1, a curvature module 2, and a construction module 3, and the construction module 3 communicates with the photographing module 1 and the curvature module 2 respectively. In the device, the photographing module 1 is configured to obtain a surface image of the lens 4 by optical photographing, and extract lens edge contour information according to the surface image; the curvature module 2 is configured to obtain edge information of the lens 4 by optical rotation scanning, and then obtain lens edge thickness and boundary information of the front and back surfaces according to the edge information; the construction module 3 is configured to obtain the lens stereoscopic contour by a three-dimensional image construction method using the lens edge contour information and the lens edge thickness and boundary information of the front and back surfaces.

[0071] See also Figure 2 As shown, in this embodiment, the photographing module 1 includes a light source 11, a collection device 12, an imaging device 13, a spectroscope 14, and an extraction device 15. The light source 11, the spectroscope 14, and the collection device 12 are sequentially arranged along the propagation direction of the photographing signal light, and the collection device 12, the spectroscope 14, and the imaging device 13 are sequentially arranged along the propagation direction of the surface reflected signal light. The extraction device 15 is electrically connected to the imaging device 13, and the construction module 3 communicates with the extraction device 15.

[0072] See also Figure 2As shown, in the photographing module 1, the light source 11 generates photographing signal light, which is then transmitted into the collecting device 12 by the beam splitter 14. The collecting device 12 converts the photographing signal light into the surface reflection signal light of the lens 4, and transmits it back to the beam splitter 14. The beam splitter 14 reflects the surface reflection signal light into the imaging device 13. The imaging device 13 receives the image information of the surface reflection signal light, obtains the surface image, and then transmits it to the extraction device 15. The extraction device 15 extracts the edge contour information of the lens 4 according to the surface image using a contour extraction algorithm.

[0073] Please continue to see Figure 2 As shown, in this embodiment, the beam splitter 14 is a semi-reflective and semi-transparent beam splitter. The acquisition device 12 includes a focusing lens 121 and a sample stage 122 which are sequentially arranged along the propagation direction of the photographing signal light. The focusing lens 121 is used to collimate the photographing signal light into the lens 4, and is also used to focus the surface reflection signal light formed by the lens 4 into the beam splitter 14; the sample stage 122 is used to place the lens 4. The distance from the focusing lens 121 to the sample stage 122 is between 0.5 times and 1 times the focal length of the focusing lens 121. At the same time, the imaging device 13 includes an imaging lens 131 and an image sensor 132 which are sequentially arranged along the propagation direction of the surface reflection signal light. The image sensor 132 is a planar array image sensor. The image sensor 132 is arranged at the image plane of the imaging lens 131 to receive the imaging of the imaging lens 131 and obtain a surface image.

[0074] Furthermore, in the camera module 1, the entrance pupil of the light source 11 and the imaging lens 131 is at the rear focus of the focusing lens 121. The light emitted by the light source 11 is transmitted through the beam splitter 14 and then collimated by the focusing lens 121 to form a nearly parallel beam to illuminate the lens 4 placed on the sample stage 122. The surface reflected light formed by the surface of the lens 4 to be illuminated enters the imaging lens 131 after being reflected by the focusing lens 121 and the beam splitter 14, and is focused and formed in the image sensor 132. The extraction device 15 recognizes the edge contour based on the collected sample image.

[0075] See also Figure 3 As shown, in this embodiment, the curvature module 2 includes an illumination module 21, a conversion module 22, a reflector 23 and a lifting and rotating device 24, wherein the illumination module 21, the reflector 23 and the lifting and rotating device 24 are sequentially arranged along the propagation direction of the illumination signal light, and the lifting and rotating device 24, the reflector 23 and the conversion module 22 are sequentially arranged along the propagation direction of the edge reflected light. The construction module 3 communicates with the conversion module 22.

[0076] See also Figure 3As shown, in the curvature module 2, the lifting and rotating device 24 is used to clamp the lens 4 along the axial direction of the lens 4, so that the lens 4 is on the propagation path of the illumination signal light, and rotate the lens 4 along the axial direction of the lens 4 and / or drive the lens 4 to lift and lower. The lens 4 is installed on the lifting and rotating device 24, and the illumination module 21 generates illumination signal light, and then the illumination signal light is reflected into the edge of the lens 4 by the reflector 23, and the edge of the lens 4 reflects the signal light to form edge reflection light, and the edge reflection light of the lens 4 is reflected into the conversion module 22 by the reflector 23. The conversion module 22 obtains the edge information of the lens 4 according to the edge reflection light of the lens 4, and then obtains the edge thickness of the lens and the boundary information of the front and rear surfaces according to the edge information. By manipulating the lifting and rotating device 24 to rotate the lens 4 for one circle, the conversion module 22 can obtain the edge thickness of the lens 4 and the boundary information of the front and rear surfaces, so that the collection efficiency can be guaranteed, and the accuracy or quality of the image can be guaranteed.

[0077] Please continue to see Figure 3 As shown, in this embodiment, the conversion module 22 includes an imaging lens barrel 221, a photosensitive coupling component 222 and a processing unit 223, wherein the imaging lens barrel 221 and the photosensitive coupling component 222 are sequentially arranged along the propagation direction of the edge reflected light; the processing unit 223 is electrically connected to the photosensitive coupling component 222, and the construction module 3 communicates with the processing unit 223. In this embodiment, considering the position of the light source in the optical path, a semi-reflective and semi-transmissive beam splitter is placed in front of the entrance pupil of the imaging lens barrel 221, and the beam splitter is configured to reflect the light emitted by the illumination module 21 into the reflector 23, and transmit the light reflected by the reflector 23 into the imaging lens barrel 221.

[0078] In the conversion module 22, the imaging lens barrel 221 is used to image the edge of the lens 4 according to the edge reflected light; the photosensitive coupling component 222 is used to receive imaging information at the image plane of the imaging lens barrel 221, and convert the imaging information into the edge image of the lens 4 by photoelectric conversion; the processing unit 223 is configured to obtain the edge thickness of the lens and the boundary information of the front and back surfaces according to the edge image. The edge thickness of the lens and the boundary information of the front and back surfaces include the vertical coordinates of multiple groups of points with the same polar coordinates on the edge of the front and back surfaces of the lens in the lens edge image in the cylindrical coordinate system.

[0079] Furthermore, in the conversion module 22, the lens 4 is installed on the lifting and rotating device 24. After the lighting module 21 generates the lighting signal light, the reflector 23 reflects the lighting signal light into the edge of the lens 4, and the edge of the lens 4 reflects the signal light to form edge reflected light. The reflector 23 reflects the edge reflected light of the lens 4 into the imaging lens barrel 221 for imaging. The imaging information is received by the photosensitive coupling component 222 and converted into an edge image of the lens 4. Then, the processing unit 223 obtains the edge thickness of the lens and the boundary information of the front and rear surfaces according to the edge image.

[0080] See also Figure 4 As shown, in this embodiment, the construction module 3 is configured to obtain the three-dimensional contour of the lens by executing a three-dimensional image construction method comprising the following steps:

[0081] A1: Extracting the vertical coordinates of multiple pairs of points with the same polar coordinates on the edges of the front and back surfaces of the lens in the lens edge image from the lens edge thickness and the boundary information of the front and back surfaces.

[0082] like Figure 5 As shown, in this embodiment, the cylindrical coordinate system established by the processing unit 223 takes the axis of the lens 4 as the z-axis, takes the coordinate origin on the z-axis, and takes the horizontal right direction as the polar axis. On this basis, a straight line parallel to the z-axis is drawn through a certain point on the edge of the front surface of the lens in the lens edge image, and the intersection of the straight line and the edge of the back surface has the same polar coordinate as the point. Figure 5 Points P11 and P12 in are a pair of points with the same polar coordinates, and points P21 and P22 are another pair of points with the same polar coordinates. In this way, multiple pairs of points with the same polar coordinates and their vertical coordinates can be obtained.

[0083] A2: Find the positions of multiple pairs of points with the same polar coordinates in step A1 from the surface image, and obtain the polar coordinates of these points in the cylindrical coordinate system used by the processing unit 223.

[0084] like Figure 6 As shown, with the edge information as a reference, multiple pairs of points with the same polar coordinates are found in the images of the front and back surfaces of the lens 4. Figure 6 is the front surface image, on which the positions of P11 and P21 are found, and then the polar coordinates of these two points can be obtained.

[0085] A3: Based on the vertical coordinates and polar coordinates of the multiple pairs of points with the same polar coordinates, the cylindrical coordinates of these points are obtained, and the three-dimensional profile of the lens is obtained according to these cylindrical coordinates. The obtained profile is as follows: Figure 7 shown.

[0086] See also Figure 8 As shown, this embodiment further discloses a three-dimensional contour reconstruction method based on the device, which includes the following steps:

[0087] S1: Acquire a surface image of the lens 4 through the camera module 1, and extract lens edge contour information based on the surface image.

[0088] After placing the lens 4 on the sample stage 122, the light source 11 and the imaging lens 131 are placed at the rear focus of the focusing lens 121. The light source 11 is turned on to allow the light emitted by the light source 11 to be transmitted through the beam splitter 14 and then collimated by the focusing lens 121 to form a nearly parallel beam to illuminate one surface of the lens 4 placed on the sample stage 122. The surface reflected light formed by the surface of the lens 4 to be illuminated enters the imaging lens 131 after being reflected by the focusing lens 121 and the beam splitter 14, and is focused and imaged in the image sensor 132. The extraction device 15 identifies the edge profile based on the collected sample image. The lens 4 is replaced from the current surface to another surface, thereby obtaining the front and rear surface images of the lens 4 and the corresponding edge profile information.

[0089] S2: Obtain edge information of the lens 4 through the curvature module 2, and then obtain the edge thickness of the lens and the boundary information of the front and back surfaces according to the edge information.

[0090] First, the lens 4 is installed on the lifting and rotating device 24, and then the lighting module 21 is turned on to generate lighting signal light. After that, the reflector 23 reflects the lighting signal light into the edge of the lens 4, and the edge of the lens 4 reflects the signal light to form edge reflected light. The reflector 23 reflects the edge reflected light of the lens 4 into the imaging lens barrel 221 for imaging. The imaging information is received by the photosensitive coupling component 222 and converted into the edge image of the lens 4. Then, the processing unit 223 obtains the edge thickness of the lens and the boundary information of the front and back surfaces according to the edge image. By manipulating the lifting and rotating device 24 to rotate the lens 4 one circle, the processing unit 223 can obtain the edge thickness of the lens 4 and the boundary information of the front and back surfaces, and the collection efficiency can be guaranteed, and the accuracy or quality of the image can be guaranteed.

[0091] S3: Using the lens edge contour information, the lens edge thickness, and the boundary information of the front and back surfaces through construction module 3, a three-dimensional contour of the lens is obtained through a three-dimensional image construction method.

[0092] In the description of the embodiments of the present application, it should be noted that in the description of the present application, terms such as "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is only for the convenience of description, and does not indicate or imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present application.

[0093] In the description of the present application, the description with reference to the terms "one embodiment", "some embodiments", "in the present embodiment", "specific example", or "some examples" etc. means that the specific features, mechanisms, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, mechanisms, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0094] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A lens three-dimensional contour reconstruction device, characterized in that: include: A photographing module (1) is used to obtain a surface image of a lens (4) by optical photographing, and to extract lens edge profile information based on the surface image; A curvature module (2) is used to obtain edge information of the lens (4) by optical rotation scanning, and then obtain edge thickness of the lens and boundary information of the front and rear surfaces based on the edge information; A construction module (3) is used to obtain the three-dimensional contour of the lens by using the lens edge contour information and the lens edge thickness and the boundary information of the front and rear surfaces through a three-dimensional image construction method; The construction module (3) communicates with the photographing module (1) and the curvature module (2) respectively.

2. The lens three-dimensional contour reconstruction device according to claim 1, characterized in that: The photographing module (1) comprises: A light source (11) generates a photographing signal light; A collection device (12) converts the photographing signal light into a surface reflection signal light of the lens (4); An imaging device (13) receives image information of the signal light reflected from the surface and obtains an image of the surface; A beam splitter (14) transmits the photographing signal light into the collecting device (12); and reflects the surface reflected signal light into the imaging device (13); An extraction device (15) extracts edge contour information of the lens (4) based on the surface image using a contour extraction algorithm; in, The light source (11), the beam splitter (14), and the collection device (12) are arranged in sequence along the propagation direction of the photographing signal light; and the collection device (12), the beam splitter (14), and the imaging device (13) are arranged in sequence along the propagation direction of the surface reflected signal light; The extraction device (15) is electrically connected to the imaging device (13), and the building module (3) communicates with the extraction device (15).

3. The lens three-dimensional contour reconstruction device according to claim 2, characterized in that: The collection device (12) comprises: A focusing lens (121) collimates the photographing signal light and injects it into the lens (4); and focuses the surface reflected signal light formed by the lens (4) into the beam splitter (14); A sample stage (122) is provided to place the lens (4).

4. The lens three-dimensional contour reconstruction device according to claim 3, characterized in that: The distance between the focusing lens (121) and the sample stage (122) is between 0.5 times and 1 times the focal length of the focusing lens (121).

5. The lens three-dimensional contour reconstruction device according to any one of claims 2 to 4, characterized in that: The imaging device (13) comprises an imaging lens (131) and an image sensor (132) which are arranged in sequence along the propagation direction of the surface reflected signal light.

6. The lens three-dimensional contour reconstruction device according to claim 5, characterized in that: The beam splitter (14) is a semi-reflective and semi-transmissive beam splitter.

7. The lens three-dimensional contour reconstruction device according to claim 1 or 2 or 3 or 4 or 6, characterized in that: The curvature module (2) comprises: An illumination module (21) generates illumination signal light; A conversion module (22) is used to obtain edge information of the lens (4) based on the edge reflected light of the lens (4), and then obtain edge thickness of the lens and boundary information of the front and rear surfaces based on the edge information; A reflector (23) reflects the illumination signal light into the edge of the lens (4), and reflects the edge reflected light generated by the edge of the lens (4) into the conversion module (22); A lifting and rotating device (24) clamps the lens (4) along the axial direction of the lens (4), places the lens (4) on the propagation path of the illumination signal light, and rotates the lens (4) along the axial direction of the lens (4) and / or drives the lens (4) to lift and lower; in, The lighting module (21), the reflector (23), and the lifting and rotating device (24) are arranged in sequence along the propagation direction of the lighting signal light; and the lifting and rotating device (24), the reflector (23), and the conversion module (22) are arranged in sequence along the propagation direction of the edge reflected light; The construction module (3) communicates with the conversion module (22).

8. The lens three-dimensional contour reconstruction device according to claim 7, characterized in that: The conversion module (22) comprises: An imaging lens barrel (221) for imaging the edge of the lens (4) according to the edge reflected light; A photosensitive coupling component (222) receives imaging information at the image plane of the imaging lens barrel (221), and converts the imaging information into an edge image of the lens (4) by means of photoelectric conversion; A processing unit (223) is configured to obtain the edge thickness of the lens and boundary information of the front and rear surfaces according to the edge image; the edge thickness of the lens and boundary information of the front and rear surfaces include vertical coordinates of multiple groups of points with the same polar coordinates on the edge of the front and rear surfaces of the lens in the lens edge image in a cylindrical coordinate system; in, The imaging lens barrel (221) and the photosensitive coupling assembly (222) are arranged in sequence along the propagation direction of the edge reflected light; The processing unit (223) is electrically connected to the photosensitive coupling component (222), and the building module (3) communicates with the processing unit (223).

9. The lens three-dimensional contour reconstruction device according to claim 8, characterized in that: The construction module (3) is configured to obtain the three-dimensional outline of the lens by executing the three-dimensional image construction method comprising the following steps: A1: extracting the vertical coordinates of multiple pairs of points with the same polar coordinates on the edges of the front and back surfaces of the lens in the lens edge image from the lens edge thickness and the boundary information of the front and back surfaces; A2: Find the positions of a plurality of pairs of points having the same polar coordinates in step A1 from the surface image, and obtain the polar coordinates of these points in the cylindrical coordinate system used by the processing unit (223); A3: Based on the combination of the vertical coordinates and polar coordinates of the multiple pairs of points with the same polar coordinates, the cylindrical coordinates of these points are obtained, and the three-dimensional profile of the lens is obtained according to these cylindrical coordinates.

10. A method for reconstructing a three-dimensional contour of a lens, characterized in that: The lens three-dimensional contour reconstruction device according to any one of claims 1 to 9 comprises the following steps: S1: acquiring a surface image of a lens (4) through a photographing module (1), and extracting lens edge profile information based on the surface image; S2: obtaining edge information of the lens (4) through the curvature module (2), and then obtaining edge thickness of the lens and boundary information of the front and rear surfaces according to the edge information; S3: The construction module (3) uses the lens edge contour information and the lens edge thickness and the boundary information of the front and back surfaces to obtain the three-dimensional contour of the lens through a three-dimensional image construction method.

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