CN114061481A - Light source assembly and detection device - Google Patents
Light source assembly and detection device Download PDFInfo
- Publication number
- CN114061481A CN114061481A CN202010772582.0A CN202010772582A CN114061481A CN 114061481 A CN114061481 A CN 114061481A CN 202010772582 A CN202010772582 A CN 202010772582A CN 114061481 A CN114061481 A CN 114061481A
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- light source
- light
- beam splitter
- workpiece
- detected
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- 238000001514 detection method Methods 0.000 title claims abstract description 35
- 230000003287 optical effect Effects 0.000 claims abstract description 11
- 239000006117 anti-reflective coating Substances 0.000 claims 1
- 238000005259 measurement Methods 0.000 abstract description 5
- 230000031700 light absorption Effects 0.000 description 11
- 238000009792 diffusion process Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 3
- 238000003384 imaging method Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
Abstract
The embodiment of the invention provides a light source assembly and a detection device, wherein the light source assembly comprises a light source and a spectroscope, the light source and the spectroscope surround a workpiece to be detected for a circle, the spectroscope is positioned on an optical path between the light source and the workpiece to be detected, light beams emitted by the light source penetrate through the spectroscope and then are projected onto the workpiece to be detected, and light beams reflected by the workpiece to be detected are projected onto the spectroscope and then are emitted after being reflected by the spectroscope. The embodiment of the invention provides a light source assembly and a detection device, which are used for obtaining a side image of a whole workpiece to be detected by shooting at one time in measurement.
Description
Technical Field
The present disclosure relates to detection technologies, and particularly to a light source assembly and a detection device.
Background
The cylindrical curved surface condition is detected on the market by adopting an area-array camera and a rotating roller wheel, the detection of the cylindrical curved surface or an article with larger length is realized by designing the rotating speed and the camera trigger frequency, but the detection mode has certain detection difficulty, and particularly the curved surface detection of smaller cylindrical articles has larger detection difficulty.
Disclosure of Invention
The embodiment of the invention provides a light source assembly and a detection device, which are used for obtaining a side image of a whole workpiece to be detected by shooting at one time in measurement.
In a first aspect, an embodiment of the present invention provides a light source assembly, which includes a light source and a beam splitter, where the light source and the beam splitter surround a workpiece to be detected for a circle, the beam splitter is located on an optical path between the light source and the workpiece to be detected, a light beam emitted by the light source penetrates through the beam splitter and is projected onto the workpiece to be detected, and a light beam reflected by the workpiece to be detected is projected onto the beam splitter and is emitted after being reflected by the beam splitter.
Optionally, the beam splitter comprises a transflective film.
Optionally, the spectroscope further comprises an anisotropic total reflection film, and the anisotropic total reflection film is positioned on one side of the semi-transparent semi-reflective film, which is far away from the light source; the anisotropic total reflection film is configured to totally transmit a light beam emitted from a light source incident thereon and totally reflect a light beam reflected by the workpiece to be detected.
Optionally, the spectroscope further includes an antireflection film on an optical path between the transflective film and the light source.
Optionally, the optical system further comprises a first light absorption device, the first light absorption device is located on a side of the beam splitter adjacent to the light source, is located on a light reflection path of the beam splitter, and is configured to absorb the light beam reflected by the beam splitter.
Optionally, the light source further comprises a second light absorption device, the second light absorption device is located on one side of the light splitter, which is close to the light source, and the first light absorption device is opposite to the second light absorption device.
Optionally, a diffuser plate is included, the diffuser plate being located in the optical path between the light source and the beam splitter.
Optionally, the light source comprises a plurality of light emitting diodes, and the exit angle of the light emitting diodes is less than or equal to 15 °.
Optionally, the light source is a ring light source.
In a second aspect, an embodiment of the present invention provides a detection apparatus, including the light source assembly of the first aspect, and the detection apparatus further includes a detection unit, where the detection unit is located on a reflected light path of the beam splitter and configured to receive a light beam emitted after being reflected by the beam splitter.
In the embodiment of the invention, the light source and the spectroscope are arranged in a ring shape, so that light beams emitted by the light source can be projected to the side surface of the workpiece to be detected from all directions of 360 degrees, one-time imaging light projection of the workpiece to be detected can be realized, and then a side image of the whole workpiece to be detected can be obtained through one-time shooting in measurement. By designing the light source component, convenience is provided for curved surface detection of small articles in particular.
Drawings
Fig. 1 is a schematic perspective view of a light source assembly according to an embodiment of the present invention;
fig. 2 is a schematic cross-sectional view of a light source module according to an embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view of another light source module according to an embodiment of the present invention;
FIG. 4 is a schematic cross-sectional view of another light source module according to an embodiment of the present invention;
FIG. 5 is a schematic cross-sectional view of another light source module according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a light emitting diode according to an embodiment of the present invention;
fig. 7 is a schematic perspective view of a detection apparatus according to an embodiment of the present invention;
fig. 8 is a schematic cross-sectional structural diagram of a detection apparatus according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Fig. 1 is a schematic perspective view of a light source assembly according to an embodiment of the present invention, and fig. 2 is a schematic cross-sectional view of the light source assembly according to the embodiment of the present invention, with reference to fig. 1 and fig. 2, the light source assembly includes a light source 10 and a beam splitter 20, the light source 10 and the beam splitter 20 both surround a workpiece 30 to be detected for one circle, and the beam splitter 20 is located on an optical path between the light source 10 and the workpiece 30 to be detected. Illustratively, the beam splitter 20 surrounds the workpiece 30 to be inspected for one circle, and the light source 10 surrounds the beam splitter 20 for one circle. The light beam emitted by the light source 10 passes through the beam splitter 20 and then is projected onto the workpiece 30 to be detected, and the light beam reflected by the workpiece 30 to be detected is projected onto the beam splitter 20 and then is emitted after being reflected by the beam splitter 20.
In the embodiment of the present invention, the light source 10 and the beam splitter 20 are arranged in a ring shape, so that the light beam emitted by the light source 10 can be projected to the side surface of the workpiece 30 to be detected from 360 ° in each direction, thereby realizing one-time imaging light projection of the workpiece 30 to be detected, and then obtaining a side image of the whole workpiece 30 to be detected by one-time shooting in measurement. By designing the light source component, convenience is provided for curved surface detection of small articles in particular.
Illustratively, an included angle formed by the light emitting direction of the light source 10 and the beam splitter 20 is 45 °, that is, an included angle formed by an axis of the light source 10 around the workpiece 30 to be detected and the beam splitter 20 is 45 °, wherein the axis of the light source 10 around the workpiece 30 to be detected is perpendicular to the light emitting direction of the light source 10.
Alternatively, referring to fig. 2, the spectroscope 20 includes a transflective film 21. After the light beam emitted by the light source 10 penetrates through the semi-transparent and semi-reflective film 21, half of the light energy is lost, the light beam penetrating through the semi-transparent and semi-reflective film 21 is projected onto the workpiece 30 to be detected, the light beam reflected by the workpiece 30 to be detected is projected onto the semi-transparent and semi-reflective film 21 again, and is reflected by the semi-transparent and semi-reflective film 21 and then emitted, and half of the light energy is lost again.
Fig. 3 is a schematic cross-sectional structural view of another light source assembly according to an embodiment of the present invention, and referring to fig. 3, a beam splitter 20 includes a semi-transparent and semi-reflective film 21, and the beam splitter 20 further includes an anisotropic total-reflective film 22. The anisotropic total reflection film 22 is located on the side of the transflective film 21 away from the light source 10. The anisotropic total reflection film 22 is configured to totally transmit the light beam emitted from the light source 10 incident thereon and totally reflect the light beam reflected by the workpiece 30 to be inspected. Therefore, half of the light energy is lost after the light beam emitted by the light source 10 penetrates through the semi-transparent and semi-reflective film 21, the light beam penetrating through the semi-transparent and semi-reflective film 21 is projected onto the workpiece 30 to be detected, the light beam reflected by the workpiece 30 to be detected is projected onto the anisotropic total reflection film 22, and the light beam is totally reflected by the anisotropic total reflection film 22 and then emitted, so that the light energy loss is reduced.
Fig. 4 is a schematic cross-sectional view of another light source module according to an embodiment of the present invention, and referring to fig. 4, a spectroscope 20 includes a semi-transparent and semi-reflective film 21, and the spectroscope 20 further includes an antireflection film 23. The antireflection film 23 is located on the optical path between the transflective film 21 and the light source 10. The antireflection film 23 is provided on the surface of the transflective film 21 on the side adjacent to the light source 10. The light beam emitted by the light source 10 penetrates through the anti-reflection film 23 and then reaches the semi-transparent and semi-reflective film 21, so that the reflection rate of the light beam emitted by the light source 10 and entering the semi-transparent and semi-reflective film 21 is reduced, the transmission rate of the light beam emitted by the light source 10 and penetrating through the semi-transparent and semi-reflective film 21 is increased, and the light energy loss is reduced.
Optionally, referring to fig. 2, 3 and 4, the light source module further includes a first light-absorbing device 41, the first light-absorbing device 41 is located on a side of the beam splitter 20 adjacent to the light source 10, is located on a light-reflecting path of the beam splitter 20, and is configured to absorb the light beam reflected by the beam splitter 20. In the embodiment of the present invention, the light source module further includes a first light absorption device 41, and after being reflected by the beam splitter 20, the light beam emitted by the light source 10 is projected onto the first light absorption device 41 and absorbed by the first light absorption device 41, so as to avoid uncontrollable propagation direction of the light beam caused by multiple reflections of the light beam in the light source cavity.
Alternatively, referring to fig. 2, 3 and 4, the light source module further includes a second light absorbing means 42, the second light absorbing means 42 being located on a side of the beam splitter 20 adjacent to the light source 10, the first light absorbing means 41 being opposite to the second light absorbing means 42. In the embodiment of the present invention, the light source module further includes a second light absorption device 42, and the second light absorption device can absorb the light projected thereon, so as to avoid the uncontrollable propagation direction of the light beam caused by multiple light beam reflections inside the light source cavity.
Exemplarily, referring to fig. 2, 3 and 4, the first and second light absorbing means 41 and 42 may include light absorbing cloth.
Fig. 5 is a schematic cross-sectional view of another light source module according to an embodiment of the present invention, and referring to fig. 5, the light source module further includes a diffusion plate 50, and the diffusion plate 50 is located on an optical path between the light source 10 and the beam splitter 20. The light beam emitted by the light source 10 is projected to the diffusion plate 50, and is projected to the spectroscope 20 after being diffused by the uniform light of the diffusion plate 50, and due to the uniform light diffusion effect of the diffusion plate 50, the uniformity of the light beam projected to the spectroscope 20 is increased, so that the uniformity of the light beam projected to the workpiece 30 to be detected is increased, and the quality of the detection light beam is improved.
Fig. 6 is a schematic structural diagram of a light emitting diode according to an embodiment of the present invention, and referring to fig. 2 to 6, a light source 10 includes a plurality of light emitting diodes 11, and an exit angle θ of each light emitting diode 11 is less than or equal to 15 °. I.e., θ ≦ 15. Therefore, the light emitting diode 11 has a smaller emergent angle to ensure that the collimation degree of the emergent light of the light source 10 is good enough, thereby improving the quality of the detection light beam.
Illustratively, the light emitting diode 11 is a high collimation insert light emitting diode, i.e. a high collimation insert LED.
Illustratively, referring to fig. 1, the light source 10 includes a plurality of light emitting diodes 11, the plurality of light emitting diodes 11 in the same row are disposed around the workpiece 30 to be detected, and the light source 10 may include at least one row of light emitting diodes 11 (illustratively, in fig. 1, the light source 10 includes 5 rows of light emitting diodes).
Alternatively, referring to fig. 1, the light source 10 is a ring light source. That is, the light source 10 is formed in a cylindrical shape, and the light source 10 has a circular planar configuration. In another embodiment, the light source 10 may be a square ring light source or the like, and the square ring light source may have a square shape in a plan view.
Illustratively, the workpiece 30 to be inspected has a cylindrical shape, and the surface of the workpiece 30 to be inspected has a cylindrical curved surface. The workpiece 30 to be inspected may comprise a screw, for example.
Fig. 7 is a schematic perspective view of a detection apparatus according to an embodiment of the present invention, fig. 8 is a schematic cross-sectional view of the detection apparatus according to the embodiment of the present invention, and referring to fig. 7 and fig. 8, an embodiment of the present invention further provides a detection apparatus, the detection apparatus includes a light source assembly according to the embodiment, the detection apparatus further includes a detection unit 60, and the detection unit 60 is located on a reflected light path of the beam splitter 20 and configured to receive a light beam emitted after being reflected by the beam splitter 20. In the embodiment of the present invention, the light beam emitted by the light source 10 can be projected to the side surface of the workpiece 30 to be detected from 360 ° in each direction, and the light beam emitted after being reflected by the beam splitter 20 is projected to the detection unit 60, so that the detection unit 60 can capture the side surface image of the whole workpiece 30 to be detected at one time during measurement.
The inspection unit 60 illustratively includes a camera by which a side image of the entire workpiece 30 to be inspected is taken at once.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious modifications, rearrangements, combinations and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. The light source assembly is characterized by comprising a light source and a spectroscope, wherein the light source and the spectroscope surround a workpiece to be detected for a circle, the spectroscope is positioned on an optical path between the light source and the workpiece to be detected, light beams emitted by the light source penetrate through the spectroscope and then are projected onto the workpiece to be detected, and light beams reflected by the workpiece to be detected are projected onto the spectroscope and then are emitted after being reflected by the spectroscope.
2. The light source assembly of claim 1, wherein the beam splitter comprises a transflective film.
3. The light source assembly according to claim 2, wherein the beam splitter further comprises an anisotropic total reflection film, the anisotropic total reflection film is located on a side of the semi-transparent semi-reflective film away from the light source; the anisotropic total reflection film is configured to totally transmit a light beam emitted from a light source incident thereon and totally reflect a light beam reflected by the workpiece to be detected.
4. The light source assembly of claim 2, wherein the beam splitter further comprises an anti-reflective coating in an optical path between the transflective film and the light source.
5. The light source module as recited in claim 1, further comprising a first light absorbing device located on a side of the beam splitter adjacent to the light source, in a light reflecting path of the beam splitter, and configured to absorb the light beam reflected by the beam splitter.
6. The light source module as recited in claim 5, further comprising a second light absorbing means located on a side of the beam splitter adjacent the light source, the first light absorbing means being opposite the second light absorbing means.
7. The light source assembly of claim 1, further comprising a diffuser plate positioned in an optical path between the light source and the beam splitter.
8. The light source assembly of claim 1, wherein the light source comprises a plurality of light emitting diodes having an exit angle of less than or equal to 15 °.
9. The light source assembly of claim 1, wherein the light source is a toroidal light source.
10. A detection device, comprising the light source assembly as recited in any one of claims 1 to 9, the detection device further comprising a detection unit, the detection unit being located on the reflected light path of the beam splitter and configured to receive the light beam emitted after being reflected by the beam splitter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010772582.0A CN114061481A (en) | 2020-08-04 | 2020-08-04 | Light source assembly and detection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010772582.0A CN114061481A (en) | 2020-08-04 | 2020-08-04 | Light source assembly and detection device |
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| Publication Number | Publication Date |
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| CN114061481A true CN114061481A (en) | 2022-02-18 |
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| CN202010772582.0A Pending CN114061481A (en) | 2020-08-04 | 2020-08-04 | Light source assembly and detection device |
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|---|---|---|---|---|
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| CN101013226A (en) * | 2001-12-18 | 2007-08-08 | 三星电子株式会社 | Transmissive and reflective type liquid crystal display |
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| CN102419320A (en) * | 2010-09-14 | 2012-04-18 | 精工爱普生株式会社 | Detection apparatus |
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| CN105116557A (en) * | 2015-09-18 | 2015-12-02 | 王治霞 | Light splitting slice, laser coaxial range finder and application thereof |
| CN206074473U (en) * | 2016-08-31 | 2017-04-05 | 深圳市鹰眼在线电子科技有限公司 | It is applied to the optical system and Optical devices of pcb board automated optical detection equipment |
| CN106645161A (en) * | 2016-09-27 | 2017-05-10 | 凌云光技术集团有限责任公司 | Surface defect detecting system and method |
| CN207298809U (en) * | 2017-08-31 | 2018-05-01 | 东莞科视自动化科技有限公司 | A kind of bonder combined light source device |
| CN209248244U (en) * | 2018-10-23 | 2019-08-13 | 深圳市华周测控技术有限公司 | 360 degree of visual angle optical system imaging devices |
| CN209400804U (en) * | 2019-03-08 | 2019-09-17 | 浙江水晶光电科技股份有限公司 | Augmented reality optics module and head-mounted display apparatus |
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2020
- 2020-08-04 CN CN202010772582.0A patent/CN114061481A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101013226A (en) * | 2001-12-18 | 2007-08-08 | 三星电子株式会社 | Transmissive and reflective type liquid crystal display |
| JP2003240728A (en) * | 2002-02-21 | 2003-08-27 | Koyo Mach Ind Co Ltd | Method and apparatus for examining outer periphery of object to be examined |
| CN102401794A (en) * | 2010-09-14 | 2012-04-04 | 精工爱普生株式会社 | Optical device unit and detection apparatus |
| CN102419320A (en) * | 2010-09-14 | 2012-04-18 | 精工爱普生株式会社 | Detection apparatus |
| CN204008074U (en) * | 2014-08-20 | 2014-12-10 | 武汉光驰科技有限公司 | Photodetector feature measurement experimental provision |
| CN105116557A (en) * | 2015-09-18 | 2015-12-02 | 王治霞 | Light splitting slice, laser coaxial range finder and application thereof |
| CN206074473U (en) * | 2016-08-31 | 2017-04-05 | 深圳市鹰眼在线电子科技有限公司 | It is applied to the optical system and Optical devices of pcb board automated optical detection equipment |
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| CN207298809U (en) * | 2017-08-31 | 2018-05-01 | 东莞科视自动化科技有限公司 | A kind of bonder combined light source device |
| CN209248244U (en) * | 2018-10-23 | 2019-08-13 | 深圳市华周测控技术有限公司 | 360 degree of visual angle optical system imaging devices |
| CN209400804U (en) * | 2019-03-08 | 2019-09-17 | 浙江水晶光电科技股份有限公司 | Augmented reality optics module and head-mounted display apparatus |
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Application publication date: 20220218 |