CN220231499U

CN220231499U - Coaxial light detection device

Info

Publication number: CN220231499U
Application number: CN202320824385.8U
Authority: CN
Inventors: 杨应俊; 吴贵阳
Original assignee: Silicon Electric Semiconductor Equipment Shenzhen Co ltd
Current assignee: Silicon Electric Semiconductor Equipment Shenzhen Co ltd
Priority date: 2023-04-06
Filing date: 2023-04-06
Publication date: 2023-12-22
Anticipated expiration: 2033-04-06

Abstract

The utility model discloses a coaxial light detection device, which comprises a slide holder, a box body, a lamp plate, a light guide assembly, a detection assembly and a semi-reflective semi-transparent lens, wherein the slide holder forms a placement area for placing a workpiece; a light source cavity and a detection cavity which are communicated with each other are formed in the box body, and a light transmission opening and a light reflection opening are respectively formed in the top end and the bottom end of the box body; the lamp panel is provided with a plurality of lamp beads; the light guide assembly comprises a plurality of shading sleeves which are arranged on the lamp panel, the shading sleeves comprise light inlet ends and light outlet ends which are oppositely arranged, the light outlet ends are provided with light outlet ports, the light inlet ends are arranged on the lamp panel, each lamp bead is covered with a shading sleeve, and the cross section area of each shading sleeve is gradually expanded from the light inlet ends to the light outlet ends; the detection assembly comprises a camera and a detection unit, the camera is positioned above the box body, and the semi-reflective semi-transparent lens is arranged in the detection cavity. The coaxial light detection device increases the brightness of the light emitted from the light reflecting opening, so that a camera can shoot a clearer image.

Description

Coaxial light detection device

Technical Field

The utility model relates to the technical field of image detection, in particular to a coaxial light detection device.

Background

In the field of machine vision technology, coaxial light sources provide more uniform illumination than conventional light sources while avoiding workpiece reflection, thus improving machine vision accuracy and reproducibility.

The coaxial light is scattered by the light source through the diffusion plate and is transmitted to the semi-reflecting and semi-transmitting lens, and the semi-reflecting and semi-transmitting lens reflects the light to the workpiece and then is reflected to the lens by the workpiece. On the light path, after the light source emits, half of the light is transmitted to the workpiece through the half-reflection semi-transparent lens, and the other half of the light is absorbed by the black flannelette on the opposite inner wall; half of the light is reflected after reaching the workpiece, and is split again when passing through the half mirror.

Because the light of light source can not be completely along straight line propagation usually, therefore the light of coaxial light source can diffuse to all around after the light is launched, leads to the light that the light source launched when reaching half-reflection semi-transparent lens, and partial light can slope to the half-reflection semi-transparent lens to lead to the angle of the light after half-reflection semi-transparent lens refraction and the deviation of predetermineeing the angle, and then lead to the quantity reduction of the light that refracts to the work piece through half-reflection semi-transparent lens, influence the accuracy of detection.

Disclosure of Invention

The utility model mainly aims to provide a coaxial light detection device, which aims to solve the problem that the detection accuracy is affected due to the fact that the quantity of light refracted to a workpiece by the existing coaxial light detection device is small.

In order to achieve the above purpose, the utility model provides a coaxial light detection device, which comprises a slide holder, a box body, a lamp panel, a light guide assembly, a detection assembly and a semi-reflective semi-transmissive lens, wherein the slide holder forms a placement area for placing a workpiece; a light source cavity and a detection cavity which are communicated with each other are formed in the box body, a light transmission opening and a light reflection opening which are opposite to each other are formed in the box body corresponding to the top end and the bottom end of the detection cavity, the light reflection opening is arranged corresponding to the placement area, and a light inlet is formed at the communication position of the light source cavity and the detection cavity; the lamp panel is positioned in the light source cavity and is opposite to the light inlet, and a plurality of lamp beads are arranged on one side of the lamp panel facing the light inlet; the light guide assembly is arranged in the light source cavity, the light guide assembly comprises a plurality of shading sleeves which are arranged on the lamp panel, the shading sleeves comprise light inlet ends and light outlet ends which are arranged oppositely, the light outlet ends are provided with light outlet ports, the number of the shading sleeves is consistent with that of the lamp beads, the light inlet ends are arranged on the lamp panel, the light outlet ends face the detection cavity, the shading sleeves are arranged outside the lamp beads in a covering mode, and the cross section area of each shading sleeve is gradually expanded from the light inlet ends to the direction of the light outlet ends; the detection assembly comprises a camera and a detection unit, wherein the camera is positioned above the box body, and the lens of the camera and the light-transmitting opening are arranged opposite to each other; the light beam emitted by the lamp beads passes through the shading sleeve and is emitted to the semi-reflecting semi-transparent lens from the light outlet, the semi-reflecting semi-transparent lens refracts the light beam and emits the light beam to the workpiece in the placement area from the light reflecting opening, the workpiece reflects the light beam and penetrates the semi-reflecting semi-transparent lens to emit from the light transmitting opening, the camera captures the light beam and photographs the workpiece, and the detection unit is used for detecting the workpiece according to photographing information.

In an embodiment, the light inlet and the light outlet are identical in shape and are opposite to each other, the lamp panel is mounted at one end, far away from the detection cavity, of the light source cavity, and the lamp beads are opposite to the light inlet.

In an embodiment, the light shielding sleeve is in a truncated cone structure or a truncated cone structure.

In an embodiment, the included angle formed by the semi-reflective semi-transparent lens, the light transmitting opening and the light reflecting opening is 45 degrees, the light emitted by the lamp beads horizontally irradiates the semi-reflective semi-transparent lens, and the light vertically irradiates downwards to the workpiece after being refracted by the semi-reflective semi-transparent lens.

In an embodiment, the inner wall of the side of the detection cavity away from the light source cavity is subjected to a blackening process.

In an embodiment, the light beads are LED lights.

In an embodiment, the box body is a heat conducting box body, and the outer wall of the light source cavity corresponding to the position where the lamp panel is located is provided with heat dissipation fins.

In an embodiment, the number of the heat dissipation fins is plural, and the plurality of heat dissipation fins are uniformly arranged on the outer wall of the light source cavity at intervals.

In an embodiment, the camera is a CCD camera.

In an embodiment, the coaxial light detection device further includes a bearing platform and a display module, the slide platform and the display module are both disposed above the bearing platform, and the detection unit is respectively connected with the display module and the camera in a communication manner.

According to the technical scheme, the lamp panel is provided with the plurality of lamp beads, the lamp beads can be uniformly distributed on the lamp panel at intervals, the light guide assembly comprises the plurality of shading sleeves, the number of the shading sleeves can be consistent with that of the lamp beads and corresponds to that of the lamp beads one by one, one shading sleeve is covered outside each lamp bead, the shading sleeves are covered outside the lamp beads, light emitted by the lamp beads can be restrained by the shading sleeves, due to the limitation of the self-generated structure of the shading sleeves on the light, the light can only be diffused from the light outlet of the shading sleeves, and compared with the scheme without the shading sleeves, the light emitted by the lamp beads can be prevented from being obliquely emitted to the semi-reflective semi-transparent lens after being diffused, so that the semi-reflective semi-transparent lens can only refract a small amount of light to the light reflecting opening. Through setting up the shading sleeve, the light that has reduced the lamp pearl and has sent out to half the distance of reflecting semi-transparent lens, thereby make light can be the state of direct after the light outlet is penetrated to half the reflecting semi-transparent lens, and then make half the reflecting semi-transparent lens can refract a large amount of light to the reflection of light mouth, increased the luminance of penetrating light from the reflection of light mouth, still can have higher luminance after making light reach the work piece, and make the work piece after with light reflection follow entering reflection of light mouth and pass through from the printing opacity mouth after the camera can take more clear image, the detection accuracy is high.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a camera, a box and a stage according to an embodiment of the present utility model;

FIG. 2 is an enlarged schematic view of area A of FIG. 1;

FIG. 3 is a schematic diagram of a light guide assembly according to an embodiment of the present utility model;

FIG. 4 is a schematic diagram of another structure of a light guide assembly according to an embodiment of the present utility model;

fig. 5 is a schematic diagram of another structure of a coaxial light detection device according to an embodiment of the utility model.

Reference numerals illustrate:

the achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The technical solutions of the present embodiment will be clearly and completely described below with reference to the drawings in the present embodiment, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. 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 utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; 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 above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In addition, the technical solutions of the embodiments of the present utility model may be combined with each other, but it is necessary to be based on the fact that those skilled in the art can implement the technical solutions, and when the technical solutions are contradictory or cannot be implemented, the combination of the technical solutions should be considered as not existing, and not falling within the scope of protection claimed by the present utility model. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

Referring to fig. 1 to 5, the coaxial light detection device 100 provided by the present utility model includes a stage 1, a box 2, a lamp panel 3, a light guide assembly 4, a detection assembly and a semi-reflective and semi-transmissive lens 6, wherein the stage 1 forms a placement area for placing a workpiece 11; a light source cavity 21 and a detection cavity 22 which are communicated with each other are formed in the box body 2, a light transmission opening 221 and a light reflection opening 222 which are opposite to each other are respectively formed in the top end and the bottom end of the box body 2 corresponding to the detection cavity 22, the light reflection opening 222 is arranged corresponding to the placement area, and a light inlet 223 is formed at the communication position of the light source cavity 21 and the detection cavity 22; the lamp panel 3 is positioned in the light source cavity 21 and is opposite to the light inlet 223, and a plurality of lamp beads 31 are arranged on one side of the lamp panel 3 facing the light inlet 223; the light guide assembly 4 comprises a plurality of light shielding sleeves 41 arranged on the lamp panel 3, the light shielding sleeves 41 comprise light inlet ends 411 and light outlet ends 412 which are oppositely arranged, the light outlet ends 412 are provided with light outlet ports 413, the number of the light shielding sleeves 41 is consistent with that of the lamp beads 31, the light inlet ends 411 are arranged on the lamp panel 3, the light shielding sleeves 41 are respectively covered outside the lamp beads 31, and the cross section areas of the light shielding sleeves 41 are gradually expanded from the light inlet ends 411 to the light outlet ends 412; the detection component comprises a camera 51 and a detection unit 52, wherein the camera 51 is positioned above the box body 2, the lens and the light-transmitting opening 221 of the camera are just opposite to each other, the semi-reflective semi-transparent lens 6 is arranged in the detection cavity 22, light emitted by the lamp beads 31 passes through the shading sleeve 41 and is emitted to the semi-reflective semi-transparent lens 6 from the light-emitting opening 413, the semi-reflective semi-transparent lens refracts the light and then emits the light to the workpiece 11 from the light-reflecting opening 222, the workpiece 11 reflects the light and emits the light from the light-transmitting opening 221 through the semi-reflective semi-transparent lens 6, the camera 51 captures the light and shoots the workpiece 11, and the detection unit 52 is used for detecting the workpiece 11 according to shooting information and has high detection accuracy.

In the technical solution of this embodiment, in the process of detecting the workpiece 11, the coaxial light detection device 100 enters the corresponding light shielding sleeve 41 and emits from the light outlet 413, the light emitted from the light outlet 413 enters the detection cavity 22 from the light inlet 223, the detection cavity 22 is provided with the semi-reflective and semi-transparent lens 6, the semi-reflective and semi-transparent lens 6 refracts the light and emits the light to the light reflecting opening 222, the light emits the light to the workpiece 11 through the light reflecting opening 222, the workpiece 11 reflects the light, the reflected light enters the detection cavity 22 again from the light reflecting opening 222 and emits from the light transmitting opening 221 through the semi-reflective and semi-transparent lens 6, and the camera 51 photographs and sends the photographed information to the detection unit 52 for detection. It will be appreciated that the semi-reflective and semi-transmissive lens 6 may be made of quartz glass which is transparent to light. The transmittance of the anti-reflection surface of the semi-reflection and semi-transparent lens 6 can reach 99.3%, and the loss of light in the propagation process is greatly reduced.

Further, install a plurality of lamp pearls 31 on the lamp plate 3, the lamp pearl 31 can be evenly arranged on the lamp plate 3 at the interval, light guide assembly 4 includes a plurality of shading sleeves 41, the quantity of shading sleeve 41 can be unanimous and the one-to-one with the quantity of lamp pearl 31, every lamp pearl 31 all covers and is equipped with a shading sleeve 41 outward, locate the lamp pearl 31 with shading sleeve 41 cover outward, can make the light that the lamp pearl 31 was launched can be restrained by shading sleeve 41, because shading sleeve 41 autogenous structure is to the restriction of light, make light can only be diffused from the light outlet 413 of shading sleeve 41, compare in the scheme that does not set up shading sleeve 41, can prevent that the light that the lamp pearl 31 was launched from becoming the slope form and being directed towards half-reflection mirror 6 after diffusing, thereby lead to half-reflection mirror 6 only can be with a small amount of light refraction to reflection mouth 222. Through setting up shading sleeve 41, the light that has reduced lamp pearl 31 and has launched to half the distance of half the half mirror 6 to make light can be the state of straightness after the light-emitting window 413 and shoot half mirror 6, and then make half mirror 6 can refract a large amount of light to reflector 222, increased the luminance of following reflector 222 and launched the light, still can have higher luminance after making the light reach work piece 11, and make work piece 11 after with light reflection follow entering reflector 222 and from the light-transmitting window 221 after camera 51 can take more clear image.

Furthermore, the cross-sectional area of the light shielding sleeve 41 gradually expands from the light incident end 411 to the light emergent end 412, as shown in fig. 1, the light incident end 411 of the light shielding sleeve 41 is mounted on the lamp panel 3 and covers the corresponding lamp beads 31, and the cross-sectional area of the light emergent end 412 is larger than that of the light incident end 411, so that the light incident ends 411 of the light shielding sleeves 41 can be arranged at intervals, the lamp beads 31 mounted on the lamp panel 3 can be arranged at intervals, the number of the lamp beads 31 mounted on the lamp panel 3 is reduced, the power consumption of the lamp panel 3 is reduced, the light emitted by the lamp beads 31 is limited by the light shielding sleeve 41, and the occurrence of mutual influence of the light emitted by adjacent lamp beads 31 can be prevented.

In an embodiment, the light inlet and the light outlet 413 are in the same shape and are opposite to each other, the lamp panel 3 is mounted at one end of the light source cavity 21 away from the detection cavity 22, and the lamp bead 31 is opposite to the light inlet 223. In this embodiment, the lamp panel 3 is mounted at one end of the light source cavity 21 far away from the detection cavity 22, so that the lamp panel 3 can be conveniently mounted, and the light inlet end and the light outlet 413 are consistent in shape and are just opposite to each other, so that the uniformity of light can be increased.

In one embodiment, the light shielding sleeve 41 is a truncated cone structure or a frustum structure. In the present embodiment, if the light shielding sleeve 41 has a truncated cone structure, the light entrance end 411 and the light exit end 412 are circular, and if the light shielding sleeve 41 has a truncated cone structure, the number of sides of the light entrance end 411 and the light exit end 412 is identical to the number of prisms of the truncated cone. The light shielding sleeve 41 is of a truncated cone structure or a frustum structure, so that light rays emitted from the light inlet end 411 to the light outlet end 412 cannot be refracted for many times on the inner wall of the light shielding sleeve 41, and uniformity of the light rays is guaranteed.

In an embodiment, the included angles formed by the semi-reflective semi-transparent lens, the light transmitting opening 221 and the light reflecting opening 222 are all 45 degrees, the light emitted by the lamp beads 31 horizontally irradiates the semi-reflective semi-transparent lens, and the light is refracted by the semi-reflective semi-transparent lens and vertically irradiates the workpiece 11 downwards. The light transmitting opening 221 and the light reflecting opening 222 in this embodiment are all vertically arranged, when light is emitted to the semi-reflective and semi-transparent lens 6 along the horizontal direction, the light can be emitted to the workpiece 11 vertically downwards after being refracted by the semi-reflective and semi-transparent lens 6 according to the refraction principle of the light due to the fact that the semi-reflective and semi-transparent lens 6 is 45 degrees with the horizontal sheet. Wherein the horizontal direction is the left-right direction in fig. 1, and the vertical direction is the up-down direction in fig. 1.

In one embodiment, the inner wall of the detection chamber 22 on the side remote from the light source chamber 21 is subjected to a blackening process. The inner wall of the detection chamber 22 on the side away from the light source chamber 21 can be prevented from reflecting the light transmitted through the half mirror plate 6, thereby affecting the image taken by the camera 51.

In one embodiment, the beads 31 are LED lamps. The lamp bead 31 adopts the LED lamp, can make the lamp bead 31 have small, power consumption low, long service life lamp advantage.

In an embodiment, the case 2 is a heat conducting case 2, and the outer wall of the light source cavity 21 corresponding to the lamp panel 3 is provided with heat dissipation fins 7. The number of the radiating fins 7 is plural, and the radiating fins 7 are uniformly arranged on the outer wall of the light source cavity 21 at intervals. By arranging the heat radiation fins 7 on the outer wall of the light source cavity 21, the lamp panel 3 can be radiated, so that the lamp panel 3 is prevented from overheating in the working process, and the plurality of heat radiation fins 7 are uniformly arranged at intervals, so that the heat radiation uniformity of the heat radiation fins 7 can be improved.

In one embodiment, the camera 51 is a CCD camera 51. In the present embodiment, the CCD camera 51 is adopted, so that the camera 51 has the advantages of small volume, light weight, no influence of magnetic field, vibration resistance and impact resistance.

In an embodiment, the coaxial light detection device 100 further includes a carrying platform 8 and a display module 9, the carrying platform 1 and the display module 9 are disposed above the carrying platform 8, and the detection unit 52 is respectively connected with the display module 9 and the camera 51 through signals. The plummer 8 can play the supporting role to slide holder 1 and display module 9, and detecting element 52 is connected with display module 9 and camera 51 signal respectively for after camera 51 sent the image of shooting to detecting element 52, detecting element 52 can send the information of detection to display module 9, so that the operating personnel looks over, has increased the detection efficiency of coaxial light detection device 100 in this embodiment.

The foregoing description of the preferred embodiments of the present utility model should not be construed as limiting the scope of the utility model, but rather should be understood to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the utility model as defined by the following description and drawings or any application directly or indirectly to other relevant art(s).

Claims

1. A coaxial light detection device, comprising:

the slide table forms a placing area for placing a workpiece;

the box body is internally provided with a light source cavity and a detection cavity which are communicated with each other, the top end and the bottom end of the box body, which correspond to the detection cavity, are respectively provided with a light transmission opening and a light reflection opening which are arranged right opposite to each other, the light reflection opening is arranged corresponding to the placement area, and a light inlet is formed at the communication part of the light source cavity and the detection cavity;

the lamp panel is positioned in the light source cavity and is opposite to the light inlet, and a plurality of lamp beads are arranged on one side of the lamp panel facing the light inlet;

the light guide assembly is arranged in the light source cavity and comprises a plurality of shading sleeves which are arranged on the lamp panel, the shading sleeves comprise light inlet ends and light outlet ends which are oppositely arranged, the light outlet ends are provided with light outlet ports, the number of the shading sleeves is consistent with that of the lamp beads, the light inlet ends are arranged on the lamp panel, the light outlet ends face the detection cavity, the shading sleeves are arranged outside the lamp beads in a covering mode, and the cross section area of each shading sleeve is gradually expanded from the light inlet ends to the light outlet ends;

the detection assembly comprises a camera and a detection unit, wherein the camera is positioned above the box body, and the lens of the camera and the light transmission opening are arranged opposite to each other;

the semi-reflection semi-transparent lens, semi-reflection semi-transparent lens set up in detect the intracavity, the light that the lamp pearl launched is passed through shading sleeve and follow the light outlet is penetrated semi-reflection semi-transparent lens, semi-reflection semi-transparent lens will after the light refraction follow the reflection of light mouth is penetrated in place the district the work piece is placed, the work piece will light reflection and infiltration semi-reflection semi-transparent lens follow the light-transmission mouth is penetrated, the camera catches light and is right the work piece is photographed, the detection unit is used for according to the information of shooing the work piece detects.

2. The coaxial light detection device according to claim 1, wherein the light inlet and the light outlet are in the same shape and are opposite to each other, the lamp panel is mounted at one end of the light source cavity far away from the detection cavity, and the lamp beads are opposite to the light inlet.

3. The coaxial light detection device of claim 2, wherein the light shielding sleeve is of a truncated cone-shaped structure or a truncated cone-shaped structure.

4. The coaxial light detecting device according to claim 3, wherein the included angle between the semi-reflective and semi-transparent lens and the light transmitting opening and the light reflecting opening are both 45 degrees, the light emitted by the lamp beads horizontally irradiates the semi-reflective and semi-transparent lens, and the light is refracted by the semi-reflective and semi-transparent lens and then vertically irradiates the workpiece downwards.

5. The coaxial light detection device according to any one of claims 1-4, wherein an inner wall of the detection chamber on a side remote from the light source chamber is subjected to a blackening process.

6. The coaxial light detection device according to any one of claims 1-4, wherein the beads are LED lamps.

7. The coaxial light detection device according to any one of claims 1-4, wherein the case is a heat conducting case, and the outer wall of the light source cavity corresponding to the location of the light panel is provided with heat dissipation fins.

8. The coaxial light detecting device according to claim 7, wherein the number of the radiating fins is plural, and the radiating fins are uniformly arranged on the outer wall of the light source cavity at intervals.

9. The in-line light detection device according to any one of claims 1 to 4, wherein the camera is a CCD camera.

10. The coaxial light detection device according to any one of claims 1-4, further comprising a carrier and a display module, wherein the carrier and the display module are both disposed above the carrier, and the detection unit is respectively in communication connection with the display module and the camera.