CN220305124U - Optical detection device and detection equipment - Google Patents

Abstract

An optical detection device and detection apparatus, the optical detection device comprising: the image transfer assembly comprises a first optical element and a second optical element, the first optical element comprises a first reflecting surface, the second optical element comprises a second reflecting surface, the first reflecting surface and the second reflecting surface respectively correspond to different sides of a workpiece, and the second reflecting surface is used for reflecting light rays from the workpiece to the first reflecting surface; the shooting component faces the first optical element and directly receives light rays from the workpiece through the first reflecting surface, and receives the light rays from the workpiece reflected by the second reflecting surface through the first reflecting surface; the light source faces the first reflecting surface. The arrangement is that the light source can illuminate two different sides of the workpiece at the same time through the image transfer assembly; simultaneously, the shooting assembly can shoot two different sides of the workpiece at the same time, so that the efficiency in shooting detection is improved. The detection equipment comprises the optical detection device, and is more efficient in detecting the workpiece.

Description

Optical detection device and detection equipment

Technical Field

The application relates to the technical field of appearance detection, in particular to an optical detection device and detection equipment.

Background

Along with the development of technology, various electromechanical devices are more and more precise, and accordingly, the requirements on the appearance and the structure of the constituent elements of the mechanical devices are higher and higher, which requires that the related elements be subjected to appearance detection before leaving the factory. Current appearance detection is typically visually detected by a camera. However, as electromechanical devices develop, the structure of the constituent elements is increasingly complex, and typically the entire element needs to be inspected on each side.

However, when passing through each side of the camera detection element, multiple shots are required, resulting in lower detection efficiency.

Disclosure of Invention

Accordingly, it is necessary to provide an optical detection device and a detection apparatus for solving the problem of low efficiency in appearance detection.

An optical detection device, the optical detection device comprising:

the image transfer assembly comprises a first optical element and a second optical element, the first optical element comprises a first reflecting surface, the second optical element comprises a second reflecting surface, the first reflecting surface and the second reflecting surface respectively correspond to different sides of a workpiece, and the second reflecting surface is used for reflecting light rays from the workpiece to the first reflecting surface;

a photographing assembly that directly receives light from the workpiece through the first reflecting surface toward the first optical element, and receives light from the workpiece reflected through the second reflecting surface through the first reflecting surface;

and the light source is oriented to the first reflecting surface.

In one embodiment, the direction of the shooting component transmitting the first reflecting surface is parallel to the direction of the first reflecting surface reflecting the light of the light source.

In one embodiment, the second reflecting surfaces of the second optical elements are each used for reflecting light from the workpiece to the first reflecting surface, the second reflecting surfaces are respectively oriented to different sides of the workpiece, and any one of the second reflecting surfaces and the first reflecting surface are oriented to different sides of the workpiece.

In one embodiment, the number of the second optical elements is two, and the two second optical elements are symmetrically distributed on two sides of the workpiece along the optical axis of the shooting assembly.

In one embodiment, the second reflecting surface has an angle of 15 ° -75 ° with the optical axis of the optical detection device.

In one embodiment, the second reflecting surface forms an angle of 30 ° or 45 ° with the optical axis of the optical detection device.

In one embodiment, the optical detection device is configured to directly capture a first region of the workpiece over a cross-section of the workpiece, the second reflective surface is configured to reflect light from a second region of the workpiece toward the first reflective surface, and the first region and the second region together correspond to a span of the cross-section of the workpiece that is greater than or equal to one half of a total circumferential span of the cross-section of the workpiece.

In one embodiment, the first region and the second region collectively correspond to a span of the workpiece cross-section that is greater than or equal to three-fourths of an overall circumferential span of the workpiece cross-section.

In one embodiment, the first optical element further comprises an incident surface on a side facing away from the workpiece, and the optical axis of the photographing assembly penetrates the first optical element from the incident surface, and the incident surface is perpendicular to the optical axis of the photographing assembly.

A detection device comprising a processor and an optical detection apparatus as in any one of the above embodiments, the optical detection apparatus being electrically connected to the processor to transmit a result of a shot to the processor.

In the above detection device, the first reflecting surface and the second reflecting surface respectively correspond to different sides of the workpiece, and the second reflecting surface is used for reflecting light from the workpiece to the first reflecting surface, and due to reversibility of light, the light from the first reflecting surface can be reflected to the workpiece through the second reflecting surface. For the light source, as the first reflecting surface and the second reflecting surface correspond to different sides of the workpiece and the light source faces the first reflecting surface, the light emitted by the light source can directly illuminate one side of the workpiece through the first reflecting surface; and the light emitted by the light source can illuminate the other side of the workpiece through the reflection of the first reflecting surface and the reflection of the second reflecting surface.

For the shooting component, the shooting component faces the first optical element to directly receive the light from the workpiece through the first reflecting surface, and the shooting component receives the light from the workpiece reflected by the second reflecting surface through the first reflecting surface. The shooting component can directly shoot one side, facing the first reflecting surface, of the workpiece; and the shooting component can shoot one side, facing the second reflecting surface, of the workpiece through the first reflecting surface and the second reflecting surface.

So set up, through the transfer subassembly, not only can make the light source illuminate two different sides of work piece simultaneously, can also make simultaneously shooting subassembly shoot two different sides of work piece simultaneously. Therefore, the efficiency of shooting detection of the optical detection device is improved, and the cost of equipment is reduced. And because the light source can illuminate the workpiece from two different sides simultaneously, the workpiece with the cambered surface can be illuminated more uniformly from different sides, and the shooting effect of the shooting assembly is better.

Drawings

Fig. 1 is a schematic structural diagram of an optical detection device according to one embodiment of the present disclosure.

Fig. 2 is a schematic structural diagram of an optical detection device according to a second embodiment of the present disclosure.

Fig. 3 is a schematic structural diagram of an optical detection device according to a third embodiment of the present disclosure.

FIG. 4 is a schematic diagram of a second optical element and workpiece distribution according to a fourth embodiment of the present disclosure.

FIG. 5 is a schematic diagram of a second optical element and workpiece distribution according to a fifth embodiment of the present application.

FIG. 6 is a schematic diagram of the distribution of the second optical element and the workpiece in the optical inspection apparatus shown in FIG. 1.

Reference numerals: 10. an optical detection device; 100. a shooting assembly; 110. a camera; 120. a lens; 200. a light source; 300. an image transfer assembly; 310. a first optical element; 311. a first reflecting surface; 312. an incidence surface; 320. a second optical element; 321. a second reflecting surface; 20. a workpiece; 21. a concave structure.

Detailed Description

In order to make the above objects, features and advantages of the present application more comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is, however, susceptible of embodiment in many other forms than those described herein and similar modifications can be made by those skilled in the art without departing from the spirit of the application, and therefore the application is not to be limited to the specific embodiments disclosed below.

In the description of the present application, it should be understood that, if there are terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., these terms refer to the orientation or positional relationship based on the drawings, which are merely for convenience of description and simplification of description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, if any, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the terms "plurality" and "a plurality" if any, mean at least two, such as two, three, etc., unless specifically defined otherwise.

In this application, unless explicitly stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly. For example, the two parts can be fixedly connected, detachably connected or integrated; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

In this application, unless expressly stated or limited otherwise, the meaning of a first feature being "on" or "off" a second feature, and the like, is that the first and second features are either in direct contact or in indirect contact through an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that if an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. If an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein, if any, are for descriptive purposes only and do not represent a unique embodiment.

The inventors have found that in visually inspecting the appearance of a workpiece, it is often necessary to adjust the work position of the workpiece multiple times or adjust the work position of the camera multiple times to capture features on different sides of the workpiece separately. Repeated adjustment and alignment for many times greatly increases the workload in the detection process. In addition, in visual appearance detection, the illumination effect is also one of important factors affecting the detection result. For example, when there is a structure such as a groove on the workpiece, the outer surface is recessed, and the side wall or the like will block light to generate shadow, insufficient illumination may result in unclear visual detection results of the recessed structure, and thus unreliable detection results.

In order to solve the above-mentioned problem, the application provides an optical detection device and check out test set, and optical detection device includes the subassembly of turning round and shoots the subassembly, can change the partial light path of shooting the subassembly within the shooting scope through the subassembly of turning round to make the shooting scope of shooting the subassembly include the different sides of work piece. Therefore, the optical detection device can shoot different side surfaces of the workpiece at the same time, shooting is carried out without adjusting the relative positions of the shooting component and the workpiece for multiple times, and the appearance detection efficiency is improved. Meanwhile, the prisms included in the image transfer assembly are matched with each other to reflect light rays of the light source to different angles, so that the workpiece is illuminated from different angles, a shadow area on the workpiece is reduced, and the detection quality is improved. The optical detection device and the detection apparatus provided by the present application are described in detail below with reference to the detailed description and the accompanying drawings.

Referring to fig. 1, fig. 1 is a schematic structural diagram of an optical detection device according to an embodiment of the present application, and the optical detection device 10 includes a photographing component 100, a light source 200, and an image transferring component 300. The image conversion assembly 300 includes a first optical element 310 and a second optical element 320, the first optical element 310 includes a first reflecting surface 311, and the second optical element 320 includes a second reflecting surface 321. The first reflecting surface 311 and the second reflecting surface 321 respectively correspond to different sides of the workpiece 20, and the second reflecting surface 321 is used for reflecting light from the workpiece 20 to the first reflecting surface 311. The photographing assembly 100 is directed to the first optical element 310 to directly receive the light from the workpiece 20 through the first reflecting surface 311, and to receive the light from the workpiece 20 reflected by the second reflecting surface 321 through the first reflecting surface 311. The light source 200 faces the first reflecting surface 311.

In the above-mentioned detecting apparatus, the first reflecting surface 311 and the second reflecting surface 321 respectively correspond to different sides of the workpiece 20, and the second reflecting surface 321 is configured to reflect the light from the workpiece 20 to the first reflecting surface 311, and due to the reversibility of the light, the light from the first reflecting surface 311 can also be reflected to the workpiece 20 by the second reflecting surface 321. As for the light source 200, since the first reflecting surface 311 and the second reflecting surface 321 correspond to different sides of the workpiece 20, and the light source 200 faces the first reflecting surface 311, the light emitted by the light source 200 can directly illuminate one side of the workpiece 20 through the first reflecting surface 311; and the light emitted from the light source 200 can illuminate the other side of the workpiece 20 through the reflection of the first reflecting surface 311 and the reflection of the second reflecting surface 321.

For the photographing element 100, the photographing element 100 faces the first optical element 310 to directly receive the light from the workpiece 20 through the first reflecting surface 311, and receives the light from the workpiece 20 reflected by the second reflecting surface 321 through the first reflecting surface 311. The photographing assembly 100 may directly photograph the side of the workpiece 20 facing the first reflecting surface 311; and, the photographing assembly 100 may photograph a side of the workpiece 20 facing the second reflecting surface 321 through the first reflecting surface 311 and the second reflecting surface 321.

As to the influence of the first reflecting surface 311 and the second reflecting surface 321 on the light, it can be understood that the light from the workpiece 20 can pass through the first reflecting surface 311 and pass through the first optical element 310 to enter the photographing assembly 100, and the light from the workpiece 20 can pass through the first reflecting surface 311 and pass through the first optical element 310 to enter the photographing assembly 100 after being reflected by the second reflecting surface 321. By doing so, by the image transfer assembly 300, it is possible to not only make the light source 200 illuminate two different sides of the workpiece 20 at the same time, but also make the photographing assembly 100 photograph two different sides of the workpiece 20 at the same time. Thus, efficiency in photographing detection of the optical detection apparatus 10 is improved, and the cost of the device is reduced.

In addition, as shown in fig. 2 and 3, since the light source 200 can illuminate the workpiece 20 from two different sides at the same time, the workpiece 20 having the arc surface can be illuminated more uniformly from different sides, so that the photographing effect of the photographing assembly 100 is better.

In one embodiment, the range of the light reflected by the first reflecting surface 311 may cover the workpiece 20 and the second reflecting surface 321, so that when the shooting assembly 100 transmits the first reflecting surface 311, on one hand, one side of the workpiece 20 can be directly shot; on the other hand, the other side of the workpiece 20 can also be photographed by the second reflecting surface 321. The coverage of the light reflected by the first reflecting surface 311 is shown as reference K in fig. 1.

With continued reference to fig. 1, in one embodiment, the first optical element 310 further includes an entrance face 312 on a side facing away from the workpiece 20. The photographing element 100 penetrates into the first optical element 310 from the incident surface 312, and the incident surface 312 is perpendicular to the optical axis of the photographing element 100. In this way, the influence of the refraction of the first optical element 310 on the photographing assembly 100 can be reduced, so as to better control the photographing direction of the photographing assembly 100, and facilitate adjustment of the inclination degree of the first reflecting surface 311 and the second reflecting surface 321.

It can be appreciated that the optical axis of the photographing assembly 100 penetrates the first optical element 310 from the incident surface 312 and penetrates the first optical element 310 from the first reflecting surface 311 to directly photograph the workpiece 20 and photograph the workpiece 20 through the second reflecting surface 321. The optical axis of the photographing assembly 100 is referred to by reference numeral L in fig. 1 ₁ 。

In one embodiment, the incident surface 312 intersects the first reflective surface 311. The angle between the incident surface 312 and the first reflecting surface 311 may be 45 °, so that the first reflecting surface 311 and the second reflecting surface 312 cooperate to reflect the light of the light source 200 to different sides of the workpiece. The angle between the incident surface 312 and the first reflecting surface 311 is shown by the reference symbol θ in fig. 1.

The first optical element 310 may be a half mirror, so that the photographing assembly 100 can photograph the workpiece 20 through the first optical element 310 on the basis of reflecting the light of the light source 200. The second optical element 320 may be a reflective prism, to reflect light to the workpiece and reflect light from the workpiece 20 to the first reflective surface 311.

With continued reference to fig. 1, in one embodiment, the direction in which the photographing element 100 transmits the first reflective surface 311 is parallel to the direction in which the first reflective surface 311 reflects the light of the light source 200. It will be appreciated that the direction in which the photographing element 100 transmits the first reflective surface 311 is the extending direction of the optical axis, i.e. the direction in which the photographing element 100 transmits the first reflective surface 311 is referred to by the reference symbol L in fig. 1 ₁ The method comprises the steps of carrying out a first treatment on the surface of the The direction of the first reflecting surface 311 reflecting the light of the light source 200 is shown as L in fig. 1 ₂ . So set up, the light source 200 can be along the same direction with shooting direction, makes shooting assembly 100 shooting in-range everywhere can be fully illuminated, has improved accuracy, the reliability of shooting assembly 100 shooting result.

Also, in the present embodiment, since the direction in which the photographing element 100 transmits the first reflection surface 311 is parallel to the direction in which the first reflection surface 311 reflects the light of the light source 200. The coverage area of the first reflecting surface 311 reflecting the light of the light source 200 and the range of the light received by the photographing assembly 100 have higher consistency, so as to facilitate the improvement of the photographing effect.

With continued reference to fig. 1, in one embodiment, the second reflecting surfaces 321 of the second optical elements 320 are each configured to reflect light from the workpiece 20 to the first reflecting surface 311, the second reflecting surfaces 321 respectively correspond to different sides of the workpiece 20, and any one of the second reflecting surfaces 321 corresponds to different sides of the workpiece 20 with respect to the first reflecting surface 311. In this way, the photographing module 100 can photograph a plurality of different sides of the workpiece 20 at the same time through a plurality of different second reflecting surfaces 321.

With continued reference to fig. 1, taking a workpiece 20 with a substantially rectangular cross section as an example, the plurality of different second reflecting surfaces 321 may face different sides of the workpiece 20, and the first reflecting surface 311 may face the top surface of the workpiece 20. Thus, the photographing assembly 100 can photograph the top surface and the different side surfaces of the workpiece 20 at the same time, thereby improving the efficiency of visual inspection.

Referring to fig. 1 to 3, in one embodiment, the number of the second optical elements 320 is two, and the two second optical elements 320 are symmetrically distributed on two sides of the workpiece 20 along the optical axis of the photographing assembly 100. It will be appreciated that in various embodiments, the workpiece 20 may be elongated as a whole, and fig. 1 to 5 show a cross section of the photographing assembly 100 in the length direction. Thus, by setting the number of the second optical elements 320 to be two, the photographing assembly 100 can directly photograph the top surface of the workpiece 20, and photograph two opposite sides of the workpiece 20 through the two second optical elements 320, respectively, so as to improve photographing efficiency.

It should be noted that the number of the second optical elements 320 is not limited to two, for example, for the workpiece 20 whose length, width, and height dimensions are not greatly different, the number of the second optical elements 320 may be set to correspond to the number of the sides of the workpiece 20, so as to detect each side of the workpiece 20. When the workpiece 20 generally includes four sides, the number of the second optical elements 320 may be four, and the four second optical elements 320 correspond to the four sides of the workpiece 20, respectively. When the workpiece 20 generally includes six sides (for example, hexagonal prisms), the number of the second optical elements 320 may be six, the six second optical elements 320 correspond to the six sides respectively, and so on, which will not be described again. Of course, the shape of the workpiece 20 refers to the general shape of the workpiece 20, and the workpiece 20 that is actually required to perform appearance inspection generally includes a complex shape and structure, and the number and distribution positions of the second optical elements 320 can be adjusted according to the actual shape of the workpiece 20.

Referring to fig. 2 and 3, further, for the workpiece 20 with a curved surface, the specific orientation of the second reflecting surface 321 may be adjusted, so that the photographing assembly 100 can photograph an area that cannot be directly photographed by the photographing assembly 100.

Referring to fig. 4 and 5, in one embodiment, the angle between the second reflecting surface 321 and the optical axis of the photographing element 100 is 15 ° -75 °. The direction of the optical axis of the photographing assembly 100 may represent the direction of incident light when the photographing assembly 100 photographs the workpiece 20 through the second reflecting surface 321, and the angle between the second reflecting surface 321 and the optical axis of the photographing assembly 100 and the incident angle when the photographing assembly 100 photographs the workpiece 20 through the second reflecting surface 321 have a corresponding relationship. Referring to fig. 4, in particular, the second reflecting surface 321 and the photographing assemblyThe angle of the optical axis of 100 and the angle of incidence are complementary, i.e. the sum of the two is 90 °. The second reflecting surface 321 is defined to have an angle α with the optical axis of the photographing element 100, and the incident angle β is defined to be α+β=90°. Referring to fig. 4, the incident light of the light source 200 and the photographing module 100 is denoted by L; the direction of the outgoing light is shown by reference L in FIG. 4 _3； The normal of the second reflecting surface 321 is referred to by reference symbol O in fig. 4.

That is, 15.ltoreq.α.ltoreq.75°. Correspondingly, the angle beta is 15 degrees or more and 75 degrees or less. Since in reflection, the incident angle is equal to the reflection angle, the optical axis of the photographing assembly 100 is generally stationary. In this way, by adjusting the angle between the second reflecting surface 321 and the optical axis of the photographing assembly 100, the area on the workpiece 20 corresponding to the reflected light can be adjusted, so as to perform targeted detection on the workpiece 20.

For example, as shown in fig. 4, the second reflecting surface 321 may have an angle of 30 ° with the optical axis of the photographing assembly 100, that is, an incident angle of 30 °, and the reflected light may correspond to an area near the bottom on the workpiece 20. This facilitates illumination and photographing of the region of the workpiece 20 that is located below. Also, as shown in fig. 4, the targeted illumination of the recessed structures 21 on the workpiece 20 is facilitated by adjusting the incident angle to 30 °, and the accuracy of visual inspection of the recessed structures 21 is improved.

Referring to fig. 5, in another embodiment, the angle between the second reflecting surface 321 and the optical axis of the photographing assembly 100 may be adjusted to be 45 ° so as to target different concave structures 21 on the surface of the workpiece 20.

Of course, the included angle between the second reflecting surface 321 and the optical axis of the photographing assembly 100 may be 15 °, 60 °, 75 °, and the like.

Referring to fig. 4 and 6, in one embodiment, the photographing assembly 100 is used to directly photograph a first region of the workpiece 20, see S in fig. 4 and 6, on a cross-section of the workpiece 20 ₁ . The second reflecting surface 321 is used for reflecting the light from the second region of the workpiece 20, see S in fig. 4 and 6, toward the first reflecting surface 311 ₂ . The first region and the second region together correspond to a span of the cross-section of the workpiece 20 that is greater than or equal to one-half of the overall circumferential span of the cross-section of the workpiece 20A kind of electronic device is disclosed. This can sufficiently secure the imaging range of the imaging module 100. With reference to fig. 6, it can be understood that only one second optical element 320 may be disposed according to the requirement of the workpiece 20, and the top surface of the workpiece 20 is directly photographed by the photographing assembly 100, that is, the top surface is the first area; the photographing assembly 100 photographs a side surface of the workpiece 20, i.e., a side surface is a second region, through the second reflecting surface 321. The first region and the second region then correspond to the cross-section of the workpiece 20 over a span equal to one half of the overall circumferential span of the cross-section of the workpiece 20.

When the number of the second optical elements 320 is at least two and distributed as shown in fig. 3, there will be an overlapping area between the first area and the second area. The first region and the second region collectively correspond to the span of the cross section of the workpiece 20, and the overlapping region is not repeatedly calculated, but the corresponding region on the workpiece 20 is calculated, that is, S is not simply calculated ₁ And S is equal to ₂ And (5) adding.

In certain embodiments, the first and second regions may also be configured to collectively correspond to a span of the cross-section of the workpiece 20 that is greater than or equal to three-quarters of the overall circumferential span of the cross-section of the workpiece 20. Of course, it is also possible to provide that the first region together with the second region covers the entire area of the cross section of the workpiece 20.

Referring to fig. 1 again, in one embodiment, the photographing assembly 100 includes a camera 110 and a lens 120, and an optical axis of the photographing assembly 100 refers to an optical axis of the lens 120.

An embodiment of the present application further provides a detection apparatus, where the detection apparatus includes a processor and the optical detection device 10 according to each embodiment, and efficient shooting can be achieved by using the optical detection device 10. The optical detection device 10 is electrically connected with the processor, and transmits the shooting result to the processor, and the processor can analyze and process the image shot by the optical detection device 10 to judge whether the workpiece 20 meets the corresponding requirement.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the claims. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.

Claims (10)

1. An optical detection device, comprising:

the image transfer assembly comprises a first optical element and a second optical element, the first optical element comprises a first reflecting surface, the second optical element comprises a second reflecting surface, the first reflecting surface and the second reflecting surface respectively correspond to different sides of a workpiece, and the second reflecting surface is used for reflecting light rays from the workpiece to the first reflecting surface;

a photographing assembly that directly receives light from the workpiece through the first reflecting surface toward the first optical element, and receives light from the workpiece reflected through the second reflecting surface through the first reflecting surface;

and the light source is oriented to the first reflecting surface.

2. The optical inspection device of claim 1, wherein the direction in which the photographing element transmits the first reflecting surface is parallel to the direction in which the first reflecting surface reflects the light of the light source.

3. The optical inspection device of claim 1, wherein the second reflective surfaces of the plurality of second optical elements are each configured to reflect light from the workpiece to the first reflective surface, the plurality of second reflective surfaces are each oriented toward a different side of the workpiece, and any of the second reflective surfaces is oriented toward a different side of the workpiece than the first reflective surface.

4. The optical inspection device according to claim 3, wherein the number of the second optical elements is two, and the two second optical elements are symmetrically distributed on two sides of the workpiece along the optical axis of the photographing assembly.

5. The optical detection device of claim 1, wherein the second reflective surface is at an angle of 15 ° -75 ° to the optical axis of the optical detection device.

6. The optical detection device of claim 5, wherein the second reflective surface is at an angle of 30 ° or 45 ° to the optical axis of the optical detection device.

7. The optical inspection device of claim 1, wherein the optical inspection device is configured to directly capture a first region of the workpiece over a cross-section of the workpiece, the second reflective surface is configured to reflect light from a second region of the workpiece toward the first reflective surface, and the first region and the second region together correspond to a span of the cross-section of the workpiece that is greater than or equal to one-half of a total circumferential span of the cross-section of the workpiece.

8. The optical inspection device of claim 7, wherein the first and second regions collectively correspond to a span of the workpiece cross-section that is greater than or equal to three-fourths of a total circumferential span of the workpiece cross-section.

9. The optical inspection device of claim 1, wherein the first optical element further comprises an entrance face on a side facing away from the workpiece, an optical axis of the photographing assembly passing from the entrance face into the first optical element, the entrance face being perpendicular to the optical axis of the photographing assembly.

10. A detection apparatus comprising a processor and an optical detection device according to any one of claims 1 to 9, the optical detection device being electrically connected to the processor for transmitting the result of the photographing to the processor.