CN115452840A - Coaxial point light source and detector - Google Patents

Coaxial point light source and detector Download PDF

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Publication number
CN115452840A
CN115452840A CN202211257445.9A CN202211257445A CN115452840A CN 115452840 A CN115452840 A CN 115452840A CN 202211257445 A CN202211257445 A CN 202211257445A CN 115452840 A CN115452840 A CN 115452840A
Authority
CN
China
Prior art keywords
hole
light source
light
point light
coaxial
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202211257445.9A
Other languages
Chinese (zh)
Inventor
吴大祥
陆文
夏辉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Suzhou Farrell Automation Technology Co ltd
Original Assignee
Suzhou Farrell Automation Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Suzhou Farrell Automation Technology Co ltd filed Critical Suzhou Farrell Automation Technology Co ltd
Priority to CN202211257445.9A priority Critical patent/CN115452840A/en
Publication of CN115452840A publication Critical patent/CN115452840A/en
Pending legal-status Critical Current

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/01—Arrangements or apparatus for facilitating the optical investigation
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/01—Arrangements or apparatus for facilitating the optical investigation
    • G01N21/15—Preventing contamination of the components of the optical system or obstruction of the light path
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/8806—Specially adapted optical and illumination features
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B15/00—Special procedures for taking photographs; Apparatus therefor
    • G03B15/02—Illuminating scene
    • G03B15/06—Special arrangements of screening, diffusing, or reflecting devices, e.g. in studio

Abstract

The utility model belongs to the technical field of check out test set, specifically be a coaxial pointolite and detector, which comprises a housin, respectively be equipped with a first through-hole on two relative faces on the casing, two first through-hole is coaxial, be equipped with the second through-hole on the lateral wall of casing, second through-hole department is equipped with the pointolite, the side of dispersing of pointolite is equipped with the parallel device that diverges of light, the axis of second through-hole is perpendicular with the axis of first through-hole, still be equipped with dustproof optical splitter in the casing, with the parallel light of axis of second through-hole shines on dustproof optical splitter from second through-hole department, and the light of reflection leaves from first through-hole department the casing, the light of reflection is parallel with the axis of first through-hole, has solved how to the product emission parallel light for the camera carry out image acquisition and prevent the problem of dust pollution pointolite.

Description

Coaxial point light source and detector
Technical Field
The application belongs to the technical field of detection equipment, and particularly relates to a coaxial point light source and a detector.
Background
In the field of visual inspection, a camera is mainly used for shooting a product, and then the shot pictures are transmitted to a system for comparison, so that whether the product meets an expected standard or not is obtained, the comparison is very detailed, so that the camera has high requirements on light during shooting, and the light rays which need to be irradiated on an object are uniform, namely the object is subjected to parallel light; in the prior art, a light panel, that is, a light panel composed of a plurality of small LED lamps is usually adopted, so that light irradiated on an object can be ensured to be close to parallel light as much as possible, and then light emitted by the light panel is obliquely irradiated on a product (because, for example, if the upper surface of the object is photographed, a camera is just positioned right above the product, the light panel cannot be positioned right above the object at the moment, and the light panel is inclined relative to the surface of the product), which causes that the colors of a top view photographed by a product camera are not correct, the photographed surface of the product cannot be completely displayed, and meanwhile, many application scenes have dust, and a point light source cannot be contaminated by dust, so that the problem that the dust enters the surface of the point light source to influence light emission is avoided, and therefore, a point light source suitable for the camera to collect surface information of the product needs to be designed.
Disclosure of Invention
The purpose of this application is to prior art's shortcoming, adopts the mode of first through-hole, the dustproof spectroscope of second through-hole cooperation, provides a coaxial pointolite, reflects the transmission through the light that dustproof spectroscope was dispersed the pointolite, has solved how to carry out image acquisition and prevent the problem of dust pollution pointolite to the product emission parallel light with supplying the camera.
The following technical scheme is specifically adopted in order to achieve the purpose:
the utility model provides a coaxial pointolite, includes the casing, respectively be equipped with a first through-hole, two on relative two faces on the casing first through-hole is coaxial, be equipped with the second through-hole on the lateral wall of casing, second through-hole department is equipped with the pointolite, the side of dispersing of pointolite is equipped with the parallel device that disperses of light, the axis of second through-hole is perpendicular with the axis of first through-hole, still be equipped with dustproof optical splitter in the casing, with the parallel light of axis of second through-hole shines on dustproof optical splitter from second through-hole department, and the light of reflection leaves from first through-hole department the casing, and the light of reflection is parallel with the axis of first through-hole.
Furthermore, dustproof optical splitter includes dustproof transparency and beam split transparency.
Further, the shell is of a rectangular structure.
Furthermore, the light splitting transparent sheet and the inner side wall of the shell where the first through hole is located form an angle of 45 degrees, and the light splitting transparent sheet and the inner side wall of the shell where the second through hole is located form an angle of 45 degrees.
Furthermore, the dustproof transparent sheet and the light splitting transparent sheet are plane glass sheets.
Furthermore, a extinction mechanism is arranged in the shell and comprises an extinction plate arranged opposite to the second through hole.
Furthermore, a plurality of conical blocks are densely distributed on the extinction plate, and extinction spray paint is coated on both the extinction plate and the conical blocks.
Further, the light parallel diverging device comprises a concave lens, the concave surface of the concave lens faces the direction of the point light source, and the point light source is positioned at the focal point of the concave surface of the concave lens
A detector comprises the coaxial point light source, a camera is arranged outside a shell, the camera is located outside a shell side wall of which the inner side wall of a second through hole is at an angle of 135 degrees, and a shooting surface of the camera faces towards a first through hole.
Further, the camera is a CCD camera.
The beneficial effect of this application is as follows:
1. the coaxial point light source is provided by adopting a mode that the first through hole and the second through hole are matched with the dustproof light splitter, and light rays emitted by the point light source are reflected and transmitted through the dustproof light splitter, so that the problems of transmitting parallel light to a product to carry out image acquisition on a camera and preventing dust from polluting the point light source are solved;
2. in the application, the inner side wall of the shell where the light splitting transparent sheet and the first through hole are positioned is 45 degrees, the light splitting transparent sheet is parallel to the dustproof transparent sheet, one part of light reflected to the direction of the dustproof transparent sheet by the light splitting transparent sheet is projected to the extinction plate through reflection, and the other part of light is projected to the first through hole in the light reflection direction through the dustproof transparent sheet, so that the influence on the detection of a camera is avoided;
3. this application is through setting up extinction board and toper piece, eliminates the inside parasitic light of casing to prevent that the inside parasitic light of casing from causing the influence to the formation of image, further improve the definition of formation of image.
Drawings
FIG. 1 is a schematic structural diagram of the present application;
fig. 2 is a positional relationship diagram of the dust-proof transparent sheet with respect to the first through hole and the second through hole;
FIG. 3 is a diagram showing the relative position of the camera to the beam splitter in the present application;
FIG. 4 is a schematic diagram of the light propagation path in the present application;
FIG. 5 is a diagram illustrating the relationship between a concave lens and a point light source.
Reference numerals are as follows: 1. a housing; 2. a point light source; 3. a concave lens; 4. a light splitting transparent sheet; 5. a first through hole; 6. a camera; 7. a dust-proof transparent sheet; 8. a second through hole; 9. a extinction plate; 10. a conical block; 11. and (5) measuring the object.
Detailed Description
Example 1
Referring to fig. 1, the present embodiment provides a coaxial point light source, including a housing 1, two opposite surfaces on the housing 1 are respectively provided with a first through hole 5, two first through holes 5 are coaxial, a second through hole 8 is provided on a side wall of the housing 1, as shown in fig. 2, a point light source 2 is provided at the second through hole 8, a light parallel diverging device is provided at a diverging side of the point light source 2, including a concave lens 3, a concave surface of the concave lens 3 faces the direction of the point light source 2, the point light source 2 is located at a focus of the concave surface of the concave lens 3 to disperse light into parallel light, after the concave lens 3 is provided, a lamp panel may not be used, parallel light can be obtained directly with one point light source, because most of point light sources (lamps) produced by human beings are circular, similar to the point light sources, an axis of the second through hole 8 is perpendicular to an axis of the first through hole 5, a dustproof light splitter is further provided in the housing 1, after light parallel to an axis of the second through hole 8 irradiates on the dustproof splitter from the second through hole 8, the dustproof splitter, the reflected light leaves the housing 1 from the first through hole 5, and the housing 1 is of a rectangular structure.
Referring to fig. 1 and 2, the dustproof optical splitter includes dustproof transparent sheet 7 and beam splitting transparent sheet 4 that are parallel to each other, dustproof transparent sheet 7 and beam splitting transparent sheet 4 are planar glass sheets, beam splitting transparent sheet 4 is 45 degrees with the inside wall of casing 1 where first through-hole 5 is located, it is 45 degrees with the inside wall of casing 1 where second through-hole 8 is located equally, namely, after the light is dispersed by pointolite 2, at first reflect to dustproof transparent sheet 7 through beam splitting transparent sheet 4, see through dustproof transparent sheet 7 again and project on testee 11, beam splitting transparent sheet 4 mainly plays the reflex action, dustproof transparent sheet 7 is because parallel with beam splitting transparent sheet 4, therefore the light that dustproof transparent sheet 7 self-reflected is just parallel with the lens of camera 6 (also be parallel with the face of being surveyed of testee 11), can not get into the camera, therefore the image that camera 6 gathered can not be influenced by the light that dustproof transparent sheet 7 self-reflected.
Referring to fig. 1, in order to further eliminate the stray light in the housing 1, a extinction mechanism is arranged in the housing 1 and comprises an extinction plate 9 arranged opposite to the second through hole 8, the extinction plate 9 is tightly connected with the inner top of the housing 1 and has no gap, a plurality of conical blocks 10 are densely distributed on the surface of the extinction plate 9, the conical blocks 10 are arranged to enlarge the contact area with the light, extinction paint is coated on the surfaces of the extinction plate 9 and the conical blocks 10, a small amount of stray light in the housing 1 is absorbed through the extinction paint, and the phenomenon that imaging is dizzy due to the stray light in the housing 1 is avoided, so that the imaging is not clear.
Example 2
Referring to fig. 1, the present application further provides a detector, including the coaxial point light source in embodiment 1, a camera 6 is arranged outside the housing 1, a CCD camera 6 is used here, the camera 6 is located outside the sidewall of the housing 1 where the light splitting transparent sheet 4 and the inner sidewall of the second through hole 8 are at an angle of 135 °, the shooting surface of the camera 6 faces the first through hole 5, the CCD camera 6 has a smaller volume and has anti-allergic exposure performance, the chip is not damaged due to light intensity, the shooting is performed towards the first through hole 5, and the definition and accuracy of the object to be detected 11 can be greatly improved by matching with the dustproof light splitter.
When the camera is used specifically, an operator opens the point light source 2 to irradiate the inside of the shell 1, light is dispersed into parallel light after penetrating through the concave lens 3, the parallel light is reflected on the light splitting transparent sheet 4 and then irradiates on the dustproof transparent sheet 7, wherein the light penetrating through the light splitting transparent sheet 4 irradiates on a product, then the light reflected on the product sequentially penetrates through the dustproof transparent sheet 7 and the light splitting transparent sheet 4 to enter the inside of the camera 6, image information of the surface of the product is collected in the camera, the light penetrating through the light splitting transparent sheet 4 and the light reflected by the dustproof transparent sheet 7 on the point light source 2 irradiates on the extinction plate 9 to be absorbed, after the image detected by the camera 6 is processed through the light splitting transparent sheet 4, blurry feeling and dizzy feeling caused by reflection and impurities can be greatly reduced, the dustproof transparent sheet 7 is arranged to prevent dust from entering the shell 1 from the second through hole 8, meanwhile, when the dustproof transparent sheet 7 is directly arranged to be perpendicular to the light irradiating on the body 11 (product) to be measured, the dustproof camera, the arrangement mode parallel to the light splitting transparent sheet 4 can prevent the dust from entering the inside of the transparent sheet 7 from entering the inside of the camera 6, and the collected image quality of the camera is influenced by the collected image.
Of course, the whole housing 1 is provided with glass at the closed first through hole.

Claims (10)

1. The utility model provides a coaxial pointolite, its characterized in that includes casing (1), respectively be equipped with one first through-hole (5) on casing (1) relative two faces, two first through-hole (5) are coaxial, be equipped with second through-hole (8) on the lateral wall of casing (1), second through-hole (8) department is equipped with pointolite (2), one side in pointolite (2) orientation casing (1) is equipped with the parallel device that diverges of light, the axis of second through-hole (8) is perpendicular with the axis of first through-hole (5), still be equipped with dustproof spectrometer in casing (1), with after the parallel light of the axis of second through-hole (8) shined on dustproof spectrometer from second through-hole (8), the reflected light left from first through-hole (5) casing (1), and the reflected light is parallel with the axis of first through-hole (5).
2. A coaxial point light source according to claim 1, characterized in that the dust-proof beam splitter comprises a dust-proof transparent plate (7) and a beam-splitting transparent plate (4) parallel to each other.
3. A coaxial point light source according to claim 1, characterized in that the housing (1) is of rectangular configuration.
4. A coaxial point light source according to claim 2, wherein the light-splitting transparent sheet (4) and the inner side wall of the housing (1) where the first through hole (5) is located form an angle of 45 °, and the light-splitting transparent sheet (4) and the inner side wall of the housing (1) where the second through hole (8) is located also form an angle of 45 °.
5. A coaxial point light source according to claim 2, characterized in that the dust-proof transparent sheet (7) and the light-splitting transparent sheet (4) are both flat glass sheets.
6. A coaxial point light source according to claim 1, characterized in that a extinction mechanism is provided in the housing (1), said extinction mechanism comprising an extinction plate (9) provided opposite to the second through hole (8).
7. A coaxial point light source according to claim 6, characterized in that the matt plate (9) is densely populated with a plurality of tapered blocks (10), the matt plate (9) and the tapered blocks (10) being painted with a matt lacquer.
8. An on-axis point light source according to claim 1, characterized in that the light parallel diverging means comprises a concave lens (3), the concave surface of the concave lens (3) is directed towards the point light source (2), and the point light source (2) is located at the concave focal point of the concave lens (3).
9. The detector is characterized by comprising the coaxial point light source as claimed in claim 1, wherein a camera (6) is arranged outside the shell (1), the camera (6) is positioned outside the side wall of the shell (1) with the inner side wall of the second through hole (8) at an angle of 135 degrees, and a shooting surface of the camera (6) faces towards the first through hole (5).
10. A detector according to claim 9, characterized in that said camera (6) is a CCD camera (6).
CN202211257445.9A 2022-10-14 2022-10-14 Coaxial point light source and detector Pending CN115452840A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211257445.9A CN115452840A (en) 2022-10-14 2022-10-14 Coaxial point light source and detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211257445.9A CN115452840A (en) 2022-10-14 2022-10-14 Coaxial point light source and detector

Publications (1)

Publication Number Publication Date
CN115452840A true CN115452840A (en) 2022-12-09

Family

ID=84310319

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202211257445.9A Pending CN115452840A (en) 2022-10-14 2022-10-14 Coaxial point light source and detector

Country Status (1)

Country Link
CN (1) CN115452840A (en)

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