CN116184745A

CN116184745A - Lighting device and optical detection device

Info

Publication number: CN116184745A
Application number: CN202310172098.8A
Authority: CN
Inventors: 王兴锋; 杨青; 庞陈雷; 王智; 陆宏杰; 卓桐
Original assignee: Zhejiang Lab
Current assignee: Zhejiang Lab
Priority date: 2023-02-14
Filing date: 2023-02-14
Publication date: 2023-05-30

Abstract

The present application relates to an illumination device and an optical detection apparatus. The lighting device comprises a housing, a fixing assembly and a lighting assembly. The housing includes an illumination surface and a mounting surface perpendicular to the first direction, an interior cavity disposed between the mounting surface and the illumination surface, and a through hole communicating the illumination surface and the mounting surface. The through hole is used for accommodating the optical lens. The fixing component is arranged in the inner cavity close to the mounting surface and is used for being detachably connected with the optical lens in the second direction; the second direction is perpendicular to the first direction; the lighting assembly is disposed in the interior cavity. The housing includes an illumination aperture disposed at the illumination surface; the illumination assembly is exposed to the illumination aperture. The technical scheme of the application fundamentally solves the problem of fixing the lighting device in a narrow space, and also solves the problem of sample surface damage caused by sliding of the lighting device. And the illumination assembly improves the illumination intensity of the sample surface, so that the time required for imaging can be shortened.

Description

Lighting device and optical detection device

Technical Field

The present application relates to the field of optical instruments, and in particular, to an illumination device and an optical detection apparatus.

Background

In the fields of automated detection, instrument analysis, and the like, a detection instrument acquires a sample image using an optical lens, and then analyzes the image to realize a detection function. To obtain a clear image, a sufficient exposure time must be ensured. In practical production, if the number of samples is large, the exposure time is too long, which has a significant negative effect on the detection efficiency.

Disclosure of Invention

The application provides an illumination device and an optical detection device to solve part or all of the shortages in the related art.

A first aspect of the present application provides a lighting device comprising a housing, a securing assembly, and a lighting assembly. The housing includes an illumination surface and a mounting surface perpendicular to a first direction, an interior cavity disposed between the mounting surface and the illumination surface, and a through hole communicating the illumination surface and the mounting surface. The through hole is used for accommodating the optical lens. The fixing component is arranged in the inner cavity close to the mounting surface and is used for being detachably connected with the optical lens in a second direction; the second direction is perpendicular to the first direction; an illumination assembly is disposed in the interior cavity. The shell comprises illumination holes annularly distributed on the illumination surface; the illumination assembly is exposed to the illumination aperture.

Further, the fixing component comprises an arc-shaped block and a push rod; the arc-shaped surface of the arc-shaped block is used for being attached to the side surface of the optical lens; the push rod is connected with the arc-shaped block in the second direction and used for adjusting the position of the arc-shaped block in the second direction.

Further, the securing assembly includes a slide fastener disposed along the first direction; the sliding fastener is connected with the push rod; the mounting surface is provided with a bar-shaped groove extending in the second direction; the sliding fastener penetrates through the strip-shaped groove.

Further, an assembling groove extending along the first direction is formed in one side, away from the arc-shaped surface, of the arc-shaped block; one end of the push rod, which is close to the arc-shaped block, is arranged in the assembly groove and is matched with the assembly groove.

Further, the fixing assembly includes: a positioning block including a connection portion extending in the first direction and a support portion extending in the second direction; the connecting part is connected with the shell; the arc-shaped block is arranged between the supporting part and the shell.

Further, the connecting part comprises a sliding groove; the push rod penetrates through the sliding groove.

Further, the arc-shaped block comprises a flange arranged on the arc-shaped surface; the flange is adapted to mate with a groove in a side of the optical lens.

Further, the arc block includes: the flexible anti-slip piece is arranged on the arc-shaped surface and is used for being attached to the side face of the optical lens.

Further, the housing includes a side surface connecting the mounting surface and the illumination surface; the lighting assembly comprises: an optical fiber extending from the side surface into the lumen; the optical fiber comprises an illumination end; the illumination hole fixes the illumination end so that the illumination end is exposed out of the housing.

Further, the optical fibers include an input optical fiber and a plurality of output optical fibers; the number of the illumination holes corresponds to the number of the output optical fibers; the lighting assembly comprises: a spectroscopic device connected to the side surface; the input optical fiber is connected with the light splitting device; the output optical fiber comprises an input end and an output end; the input end is connected with the light splitting device; the output end of the output optical fiber is fixed at the illumination hole.

Further, the illumination holes are annularly distributed on the illumination surface around the axis of the through hole.

A second aspect of the present application provides an optical detection apparatus including an optical lens and an illumination device; the lighting device includes a housing, a securing assembly, and a lighting assembly. The housing includes an illumination surface and a mounting surface perpendicular to a first direction, an interior cavity disposed between the mounting surface and the illumination surface, and a through hole communicating the illumination surface and the mounting surface. The through hole is used for accommodating the optical lens. The fixing component is arranged in the inner cavity close to the mounting surface and is used for being detachably connected with the optical lens in a second direction; the second direction is perpendicular to the first direction; an illumination assembly is disposed in the interior cavity. The shell comprises illumination holes annularly distributed on the illumination surface; the illumination assembly is exposed to the illumination aperture.

Further, the fixing component comprises an arc-shaped block and a push rod; wherein, the arc surface of the arc block is attached to the side surface of the optical lens; the push rod is connected with the arc-shaped block in the second direction and used for adjusting the position of the arc-shaped block in the second direction.

Further, the optical fibers include an input optical fiber and a plurality of output optical fibers; the number of the illumination holes corresponds to the number of the output optical fibers; the lighting assembly comprises: the light splitting device is arranged in the inner cavity; the input optical fiber is connected with the light splitting device; the output optical fiber comprises an input end and an output end; the input end is connected with the light splitting device; the output end of the output optical fiber is fixed at the illumination hole.

Further, the illumination holes are uniformly distributed on the illumination surface in a ring shape around the axis of the through hole.

The technical scheme provided by the embodiment of the application can comprise the following beneficial effects:

according to the embodiment, the illumination device is used for dividing the supplementary light rays, circularly irradiating the supplementary light rays and converging the supplementary light rays into one point on the surface of the sample, so that the illumination intensity of the surface of the sample is greatly improved, the imaging time of the optical lens is shortened, and the imaging efficiency is improved. The detection efficiency of the optical detection device is thus higher. In addition, the illumination device and the optical lens are detachably connected, so that the problem of how to fix the illumination device on the optical lens in a narrow space is fundamentally solved, and the problem of sample surface damage caused by sliding of the illumination device is solved.

The person skilled in the art is therefore able to choose whether to assemble the illumination device on the optical lens according to the actual detection conditions of the optical detection device.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 shows a schematic cut-away view of one embodiment of an optical detection device of the present application.

Fig. 2 shows an overall schematic of one embodiment of a securing assembly of the present application.

Fig. 3 shows a schematic side view of an embodiment of an optical lens of the present application.

Fig. 4 shows an exploded schematic view of an embodiment of the housing of the present application.

The lighting device comprises a lighting device 100, a housing 1, a lighting surface 11, a mounting surface 12, a strip-shaped groove 121, a fixing hole 122, an inner cavity 13, a through hole 14, a lighting hole 15, a side surface 16, a fixing seat 17, a fixing component 2, an arc-shaped block 21, an arc-shaped surface 211, an assembling groove 212, a flange 213, a push rod 22, a sliding fastener 23, a locating block 24, a connecting part 241, a sliding groove 2411, a supporting part 242, a fixing fastener 243, a lighting component 3, an optical fiber 31, an input optical fiber 311, an output optical fiber 312, an input end 3121, an output end 3122, a light splitting device 32, an optical detection device 200, an optical lens 201, a side surface 202, a groove 203, an assembling end 204, a lens end 205, a first Z direction, a second X direction and an axis A.

Detailed Description

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The manner described in the following exemplary embodiments does not represent all manners consistent with the present application. Rather, they are merely examples of apparatus consistent with some aspects of the present application as detailed in the accompanying claims.

The terminology used in the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs. The terms "first," "second," and the like in the description and in the claims, are not used for any order, quantity, or importance, but are used for distinguishing between different elements. Also, the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one, and the terms "a" and "an" are used individually. "plurality" or "plurality" means two or more. Unless otherwise indicated, the terms "front," "rear," "lower," and/or "upper" and the like are merely for convenience of description and are not limited to one location or one spatial orientation. The word "comprising" or "comprises", and the like, means that elements or items appearing before "comprising" or "comprising" are encompassed by the element or item recited after "comprising" or "comprising" and equivalents thereof, and that other elements or items are not excluded. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any or all possible combinations of one or more of the associated listed items.

Referring to fig. 1 and 3, the present application provides an optical detection apparatus 200 including an optical lens 201 and an illumination device 100. The lighting device 100 comprises a housing 1, a fixation assembly 2 and a lighting assembly 3. The housing 1 includes an illumination surface 11 and a mounting surface 12 perpendicular to the first direction Z, an inner cavity 13 provided between the mounting surface 12 and the illumination surface 11, and a through hole 14 communicating the illumination surface 11 and the mounting surface 12. The optical lens 201 is inserted through the through hole 14. The securing assembly 2 is disposed in the interior cavity 13 proximate the mounting surface 12. The fixing member 2 is detachably connected to the optical lens 201 in the second direction X. The lighting assembly 3 is disposed in the interior cavity 13. The housing 1 comprises illumination apertures 15 annularly distributed over the illumination surface 11. The illumination assembly 3 is exposed to the illumination hole 15. In various embodiments of the present application, the second direction X is perpendicular to the first direction Z.

It should be noted that the exposure of the illumination assembly 3 to the illumination hole 15 means that the user can observe the presence of the illumination assembly 3 through the illumination hole 15 when viewing from the outside of the illumination device 100. The lighting assembly 3 may be hidden in the housing 1 or slightly protruding from the housing 1, which is not limited in this application.

The lens end 205 of the optical lens 201 extends from the mounting surface 12 into the cavity 13 and out of the illumination surface 11. The assembly end 204 of the optical lens 201 is higher than the mounting surface 12 of the lighting device 100. And is connected to the optical detection device 200. The supplemental light emitted by the illumination assembly 3 is split by annularly distributed illumination apertures 15. The supplementary light rays are circularly irradiated and converged into one point on the surface of the sample, so that the illumination intensity of the surface of the sample is greatly improved, the imaging time of the optical lens 201 is shortened, and the imaging efficiency is improved. In addition, the optical detection device 200 has limited assembly space, and the lighting device 100 is fixed on the optical lens 201 through the fixing component 2, so that the problem that the lighting device 100 is difficult to fix is solved, and the damage to the surface of a sample caused by the sliding of the lighting device 100 is avoided. In addition, the lighting device 100 does not occupy excessive assembly space of the optical detection apparatus 200, which is beneficial to improving the compactness of the optical detection apparatus 200.

Compared with the technical scheme that the image brightness is increased and the imaging quality is improved by increasing the exposure time, the illumination device 100 of the application improves the illumination intensity of the surface of the sample in an annular illumination mode, the exposure time does not need to be increased, and the imaging time of the optical lens 201 is short and the imaging efficiency is high. The detection efficiency of the optical detection device 200 is thus higher, and there is no need to change the imaging parameters, image processing algorithms, etc. of the optical detection device 200. Further, the illumination device 100 is detachably connected to the optical lens 201, so that a person skilled in the art can select whether to assemble the illumination device 100 on the optical lens 201 according to the actual detection condition of the optical detection apparatus 200.

As shown in fig. 1, the through hole 14 may extend along the first direction Z, or may form an angle with the first direction Z, and one skilled in the art may select according to an actual angle of the optical lens 201, an assembly space of the optical detection device 200, and the like, which is not limited in this application. Further, the second direction X should be understood as any direction perpendicular to the first direction Z. Taking the embodiment shown in fig. 1 as an example, the axis a of the through hole 14 extends along the first direction Z, and thus the radial direction of the through hole 14 may be the second direction X.

In some embodiments, a certain gap exists between the through hole 14 and the side 202 of the optical lens 201, so that when the lens end 205 of the optical lens 201 moves along the extending direction of the through hole 14, the housing 1 and the optical lens 201 can move relatively in the radial direction of the through hole 14, which is convenient for assembling and disassembling the lighting device 100, and can avoid the collision of the wall of the through hole 14 against the optical lens 201 during the assembling and disassembling process.

Referring to fig. 2, in some embodiments, the securing assembly 2 includes an arcuate block 21 and a push rod 22. Wherein the arc surface 211 of the arc block 21 is attached to the side surface 202 of the optical lens 201. The push rod 22 is connected to the arc block 21 in the second direction X for adjusting the position of the arc block 21 in the second direction X. In this way, when the illumination device 100 is fixed to the optical lens 201, the push rod 22 may bring the arc block 21 close to the side face 202 of the optical lens 201 in the second direction X, so that the arc block 21 can clamp the optical lens 201. When the illumination device 100 is detached from the optical lens 201, the push rod 22 may move the arc block 21 away from the side 202 of the optical lens 201 in the second direction X, so that the arc block 21 and the optical lens 201 are separated.

Since the optical detection apparatus 200 is limited in the assembly space, this arrangement does not require an operation of the optical lens 201, and the movement of the arc-shaped block 21 does not interfere with the placement position of the optical lens 201, the operation when assembling or disassembling the illumination device 100 can be simplified as much as possible and the need for an operation space can be minimized.

Referring to fig. 2 and 3, in some embodiments, the arcuate block 21 includes a flange 213 disposed on the arcuate surface 211. The flange 213 is adapted to mate with the groove 203 of the side 202 of the optical lens 201. In this way, the flange 213 can be clamped in the groove 203, and the connection strength between the arc block 21 and the optical lens 201 is improved. Taking the embodiment shown in the drawings as an example, the groove 203 can limit the movement of the arc block 21 in the first direction Z, so as to avoid the relative movement of the optical lens 201 and the arc block 21 in the first direction Z, which is beneficial to improving the connection strength between the illumination device 100 and the optical lens 201, and avoiding the problem of damage to the surface of the sample detected by the optical detection device 200 caused by the sliding of the illumination device 100. In addition, the matching of the flange 213 and the groove 203 makes the assembly position of the arc-shaped block 21 and the optical lens 201 unique, so that the problem of unclear imaging caused by inaccurate positioning of the lighting device 100 is effectively avoided.

Wherein the flange 213 may extend along the entire arcuate surface 211 as shown in fig. 2. This arrangement is advantageous in ensuring the strength of the flange 213 and improving the connection strength of the optical lens 201 and the lighting device 100. Alternatively, the flanges 213 may extend intermittently over the arcuate surface 211, for example, two, three or even more separate flanges 213 may be provided on the arcuate surface 211. This arrangement counteracts assembly tolerances between flange 213 and groove 203 and reduces the accuracy of the fit between flange 213 and groove 203, thus contributing to a reduction in manufacturing costs.

In other embodiments, the arcuate block 21 may include a flexible cleat (not shown) disposed on the arcuate surface 211. The flexible anti-slip member is adapted to engage the side 202 of the optical lens 201. The flexible anti-slip member can increase friction between the curved surface 211 and the side surface 202 of the optical lens 201, thereby maintaining the connection between the illumination device 100 and the optical lens 201. The arrangement modes of the side faces 202 of the optical lens 201 of different models and brands may be different, and the flexible anti-slip member can deform, adapt to and be attached to the side faces 202 of the optical lens 201, so that the application range of the lighting device 100 can be improved, and the side faces 202 of the optical lens 201 can be protected from being scratched by hard components.

The flexible anti-slip member may be entirely covering the arc surface 211 so as to maximize friction between the optical lens 201 and the lighting device 100. Alternatively, the flexible anti-skid member may be provided in a bar shape, such as a straight line, a wave, or the like, and extend along at least one of the first direction Z and the second direction X, thereby providing a targeted friction increasing function, which is not limited in the present application.

The push rod 22 and the arc-shaped block 21 can be integrally formed, so that the assembly is convenient. Alternatively, as shown in fig. 2, the side of the arc block 21 away from the arc surface 211 is provided with an assembly groove 212 extending in the first direction Z. One end of the push rod 22, which is close to the arc-shaped block 21, is arranged in the assembly groove 212 and is matched with the assembly groove 212. The arc-shaped block 21 is in direct contact with and cooperates with the optical lens 201, so that the machining precision of the arc-shaped block 21 needs to be higher than that of the push rod 22, which is beneficial to realizing high-precision assembly between the lighting device 100 and the optical lens 201. Through setting up arc piece 21 and push rod 22 into two separation parts, can carry out the precision setting to different parts, and then reduce processing cost. In addition, the space of the assembly groove 212 allows the push rod 22 to slightly adjust the relative position between itself and the arc block 21, so that the push rod 22 can push the arc block 21 to adjust the position between the arc block 21 and the optical lens 201, which is advantageous for improving the fitting accuracy between the arc block 21 and the optical lens 201.

With further reference to fig. 2 and 4, the securing assembly 2 includes a slide fastener 23 disposed along the first direction Z. The slide fastener 23 is connected to the push rod 22. The mounting surface 12 is provided with a bar-shaped groove 121 extending in the second direction X. The slide fastener 23 is inserted into the bar-shaped groove 121. In other words, the push rod 22 is disposed in the inner cavity 13, and the slide fastener 23 is exposed to the mounting surface 12. Therefore, when the lighting device 100 is assembled and disassembled, the person skilled in the art does not need to disassemble the housing 1 to operate the push rod 22 and the arc-shaped block 21 from the inner cavity 13, but only needs to screw and unscrew the sliding fastener 23 at the mounting surface 12 and push the sliding fastener 23 to move in the strip-shaped groove 121, so that the joint and separation between the arc-shaped block 21 and the optical lens 201 can be realized. And the slide fastener 23 protrudes from the bar-shaped groove 121, and can also function to restrict the movement of the push rod 22 in the first direction Z so as not to drop off the fixing member 2 in the first direction Z.

Further, the push rod 22 is farther from the optical lens 201 than the arc block 21 in the second direction X. Therefore, compared with the technical scheme that the sliding fastener 23 is arranged on the arc-shaped block 21, the sliding fastener 23 is arranged on the push rod 22, so that the sliding fastener 23 can avoid interference to the optical lens 201, and the optical lens 201 does not need to be modified, so that the lighting device 100 can be suitable for different optical lenses 201, and the application range of the lighting device 100 is enlarged.

In some embodiments, the securing assembly 2 includes a locating block 24. The positioning block 24 includes a connecting portion 241 extending in the first direction Z, and a supporting portion 242 extending in the second direction X. The connection portion 241 is connected to the housing 1. The arc-shaped block 21 is disposed between the support portion 242 and the housing 1. The arc-shaped block 21 can abut against the supporting portion 242 in the first direction Z, avoiding movement of the arc-shaped block 21 in the first direction Z.

As shown in fig. 2, the positioning block also includes a securing fastener 243. The fixing fastener 243 is connected to the connecting portion 241. The mounting surface 12 is provided with corresponding fixing holes 122, so that the connecting portion 241 can be detachably connected with the housing 1 by penetrating the fixing holes 122 through the fixing fasteners 243, thereby facilitating maintenance and disassembly. Alternatively, the connection portion 241 may be bonded to the case 1 and welded to improve the connection strength between the connection portion 241 and the case 1, which is not limited in this application.

In an embodiment provided with the positioning block 24, the connection portion 241 may include a sliding groove 2411, and the push rod 22 is penetrated through the sliding groove 2411. In this way, the supporting portion 242 can also support the push rod 22 in the first direction Z, avoiding loosening and misalignment of the push rod 22 in the first direction Z. In addition, the sliding groove 2411 is provided at the connecting portion 241, which can improve the structural compactness of the fixing assembly 2 and optimize the volume of the fixing assembly 2. Indeed, in other embodiments, the push rod 22 may be disposed on at least one side of the positioning block 24, that is, on the side of the positioning block 24, in connection with the arc-shaped block 21, which is not limited in this application.

The sliding groove 2411 may extend from the connecting portion 241 to the self-supporting portion 242 (as shown in fig. 2). In this way, the size of the push rod 22 in the first direction Z can be maximized, the overall strength of the push rod 22 is improved, and stress fracture is avoided. Alternatively, only a part of the connection portion 241 may be extended so as to avoid excessively weakening the supporting strength of the connection portion 241. For example, the push rod 22 may have the same size in the first direction Z from the end surface of the connecting portion 241 away from the supporting portion 242, or may have a reduced portion that mates with the sliding groove 2411. Further, the sliding groove 2411 may be a closed groove provided at a middle position of the connecting portion 241, and the push rod 22 may be engaged with the arc-shaped block 21 through the sliding groove 2411. This arrangement allows the position of the push rod 22 to be adjusted in the cavity 13 by a person skilled in the art without the need for a slide fastener 23 between the push rod 22 and the housing 1.

It should be noted that the fixing assembly 2 of fig. 2 illustrates the arrangement of two sets of arc blocks 21, push rods 22 and positioning blocks 24, and the connection between the lighting device 100 and the optical lens 201 is implemented by using a minimum number of components, but this should be regarded as exemplary and not limiting, and those skilled in the art may arrange three sets, four sets or even more sets of arc blocks 21 according to actual requirements, which the present application is not limited to.

In addition, the plurality of groups of arc blocks 21, push rods 22 and other components may be uniformly arranged around the axis a of the through hole 14, so that the clamping force of the plurality of arc blocks 21 on the optical lens 201 can be counteracted as much as possible, so that the fixing component 2 forms a force perpendicular to the extending direction of the optical lens 201 on the optical lens 201, and further the problems of deformation, reduced detection precision and the like of the optical lens 201 are caused.

Referring to fig. 1, the housing 1 includes a side surface 16 connecting the mounting surface 12 and the illumination surface 11. The lighting assembly 3 comprises an optical fiber 31. The optical fiber 31 extends from the side surface 16 into the lumen 13. The optical fiber 31 includes an illumination end. The illumination hole 15 fixes the illumination end so that the illumination end is exposed to the housing 1. The optical fiber 31 occupies a small space and is flexible and bendable, so that it can well adapt to the space of the inner cavity 13 and avoid the setting of the fixing component 2. In addition, the illumination end of the optical fiber 31 can be disposed away from the power supply, so that the power supply does not need to be disposed on the housing 1 of the illumination device 100, further optimizing the volume of the illumination device 100, so that the assembly space requirement of the illumination device 100 for the optical detection apparatus 200 is further reduced.

The illumination assembly 3 may be provided with a plurality of optical fibers 31, and the plurality of optical fibers 31 are connected to a power source, respectively, and the number of the illumination holes 15 corresponds to the number of the optical fibers 31, thereby further improving the illumination quality of the illumination assembly 3.

Alternatively, as in the embodiment shown in fig. 1, the lighting assembly 3 may further comprise a light splitting device 32 disposed in the cavity 13, and the optical fiber 31 comprises an input optical fiber 311 and a plurality of output optical fibers 312. The input optical fiber 311 is connected to the spectroscopic device 32. The number of illumination holes 15 corresponds to the number of output fibers 312. The output fiber 312 includes an input end 3121 and an output end 3122. The input 3121 is connected to the spectroscopic device 32. The output end 3122 of the output optical fiber 312 is fixed to the illumination hole 15. In other words, the spectroscopic device 32 can divide the input optical fiber 311 into a plurality of output optical fibers 312. In this way, the output optical fibers 312 do not need to be separately connected to the power supply, and only the input optical fibers 311 need to be connected to the power supply, so that only one power supply can be provided, thereby reducing the requirement on the power of the power supply. In addition, the configuration of one output optical fiber 312 can simplify the external wiring of the lighting device 100, which is beneficial to improving the aesthetic and the neatness of the lighting device 100 and the optical detection apparatus 200.

Further, as shown in fig. 4, the illumination holes 15 are distributed annularly around the axis a of the through hole 14 on the illumination surface 11. In this way, the light transmitted through the illumination hole 15 is advantageously focused on the axis a of the through hole 14, that is, the center of the field of view of the optical lens 201. This arrangement is advantageous for improving the light supplementing effect of the lighting assembly 3 on the optical lens 201. The number of the illumination holes 15 may be set by those skilled in the art according to actual needs, for example, three, four, six, eight, etc., which is not limited in this application.

The angle between the axis of the illumination hole 15 and the first direction Z can be adjusted within a certain range according to the following criteria: scattered light after oblique illumination can be effectively captured by the optical lens. As shown in fig. 4, a fixed seat 17 may be disposed on one side of the inner cavity 13 near the illumination surface 11, a wall surface of the fixed seat 17 is inclined to an axis a of the through hole 14, and an axis of the illumination hole 15 is perpendicular to the wall surface of the fixed seat 17, and an angle of the axis of the illumination hole 15 is adjusted by adjusting an angle of the fixed seat 17. Alternatively, the side of the inner cavity 13 near the illuminating surface 11 may be a plane, on which the illuminating hole 15 is directly machined, and the axis is inclined to the plane, so as to adjust the angle of the axis of the illuminating hole 15. The light leaves the illumination component 3 along the axis direction of the illumination hole 15, irradiates on the surface of the sample, and enters the optical lens 201 after being scattered, so that the brightness of the optical lens 201 is supplemented.

The specific embodiments described herein are offered by way of example only to illustrate the spirit of the present application. Those skilled in the art may make various modifications, additions, or substitutions to the described embodiments without departing from the spirit of the invention or the scope thereof as defined in the accompanying claims.

The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above 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.

Claims

1. A lighting device, comprising:

a housing including an illumination surface and a mounting surface perpendicular to a first direction, an interior cavity disposed between the mounting surface and the illumination surface, and a through hole communicating the illumination surface and the mounting surface; the through hole is used for accommodating the optical lens;

the fixing component is arranged in the inner cavity close to the mounting surface and is used for being detachably connected with the optical lens in a second direction; the second direction is perpendicular to the first direction; and

a lighting assembly disposed in the interior cavity; the shell comprises illumination holes annularly distributed on the illumination surface; the illumination assembly is exposed to the illumination aperture.

2. A lighting device as recited in claim 1, wherein said fixed component comprises an arcuate block and a pushrod; wherein, the liquid crystal display device comprises a liquid crystal display device,

the arc surface of the arc block is used for being attached to the side surface of the optical lens; the push rod is connected with the arc-shaped block in the second direction and used for adjusting the position of the arc-shaped block in the second direction.

3. A lighting device as recited in claim 2, wherein said securing assembly comprises a slide fastener disposed along said first direction; the sliding fastener is connected with the push rod; the mounting surface is provided with a bar-shaped groove extending in the second direction; the sliding fastener penetrates through the strip-shaped groove.

4. A lighting device as recited in claim 2, wherein a side of said arcuate block remote from said arcuate surface is provided with an assembly slot extending in said first direction; one end of the push rod, which is close to the arc-shaped block, is arranged in the assembly groove and is matched with the assembly groove.

5. A lighting device as recited in claim 2, wherein said securing assembly comprises:

a positioning block including a connection portion extending in the first direction and a support portion extending in the second direction; the connecting part is connected with the shell; the arc-shaped block is arranged between the supporting part and the shell.

6. A lighting device as recited in claim 5, wherein said connection portion comprises a sliding channel; the push rod penetrates through the sliding groove.

7. A lighting device as recited in claim 2, wherein said arcuate block comprises a flange disposed on said arcuate surface; the flange is adapted to mate with a groove in a side of the optical lens.

8. A lighting device as recited in claim 2, wherein said arcuate block comprises:

the flexible anti-slip piece is arranged on the arc-shaped surface and is used for being attached to the side face of the optical lens.

9. A lighting device as recited in claim 1, wherein said housing comprises a side surface which connects said mounting surface and said lighting surface; the lighting assembly comprises:

an optical fiber extending from the side surface into the lumen; the optical fiber comprises an illumination end; the illumination hole fixes the illumination end so that the illumination end is exposed out of the housing.

10. A lighting device as recited in claim 9, wherein said optical fibers comprise an input optical fiber and a plurality of output optical fibers; the number of the illumination holes corresponds to the number of the output optical fibers; the lighting assembly comprises:

a spectroscopic device connected to the side surface; the input optical fiber is connected with the light splitting device; the output optical fiber comprises an input end and an output end; the input end is connected with the light splitting device; the output end of the output optical fiber is fixed at the illumination hole.

11. A lighting device as recited in claim 9, wherein said lighting holes are distributed annularly about said lighting surface about an axis of said through hole.

12. An optical detection device is characterized by comprising an optical lens and an illumination device; the lighting device includes:

a housing including an illumination surface and a mounting surface perpendicular to a first direction, an interior cavity disposed between the mounting surface and the illumination surface, and a through hole communicating the illumination surface and the mounting surface; the optical lens penetrates through the through hole;

a securing assembly disposed in the interior cavity proximate the mounting surface; the fixing component is detachably connected with the optical lens in a second direction; the second direction is perpendicular to the first direction; and

13. The optical detection apparatus of claim 12, wherein the stationary assembly comprises an arcuate block and a push rod; wherein, the liquid crystal display device comprises a liquid crystal display device,

the arc surface of the arc block is attached to the side surface of the optical lens; the push rod is connected with the arc-shaped block in the second direction and used for adjusting the position of the arc-shaped block in the second direction.

14. The optical detection apparatus of claim 13, wherein the securing assembly includes a slide fastener disposed along the first direction; the sliding fastener is connected with the push rod; the mounting surface is provided with a bar-shaped groove extending in the second direction; the sliding fastener penetrates through the strip-shaped groove.

15. The optical inspection apparatus of claim 13, wherein a side of the arcuate block remote from the arcuate surface is provided with an assembly slot extending in the first direction; one end of the push rod, which is close to the arc-shaped block, is arranged in the assembly groove and is matched with the assembly groove.

16. The optical detection apparatus of claim 13, wherein the securing assembly comprises:

17. The optical detection apparatus according to claim 16, wherein the connection portion includes a sliding groove; the push rod penetrates through the sliding groove.

18. The optical detection apparatus of claim 13, wherein the arcuate block includes a flange disposed on the arcuate surface; the flange is adapted to mate with a groove in a side of the optical lens.

19. The optical detection apparatus of claim 13, wherein the arcuate block comprises:

20. The optical detection device of claim 12, wherein the housing includes a side surface connecting the mounting surface and the illumination surface; the lighting assembly comprises:

21. The optical detection apparatus of claim 20, wherein the optical fibers comprise an input optical fiber and a plurality of output optical fibers; the number of the illumination holes corresponds to the number of the output optical fibers; the lighting assembly comprises:

the light splitting device is arranged in the inner cavity; the input optical fiber is connected with the light splitting device; the output optical fiber comprises an input end and an output end; the input end is connected with the light splitting device; the output end of the output optical fiber is fixed at the illumination hole.

22. The optical detection apparatus of claim 20, wherein the illumination holes are distributed annularly about the axis of the through hole at the illumination surface.