CN213179906U - Detection apparatus for laser beam divergence angle - Google Patents
Detection apparatus for laser beam divergence angle Download PDFInfo
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- CN213179906U CN213179906U CN202022267274.0U CN202022267274U CN213179906U CN 213179906 U CN213179906 U CN 213179906U CN 202022267274 U CN202022267274 U CN 202022267274U CN 213179906 U CN213179906 U CN 213179906U
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Abstract
The utility model discloses a detection device for the divergence angle of a laser beam, which comprises a first diaphragm, a second diaphragm, a third diaphragm, a fourth diaphragm and a laser power meter; the first diaphragm, the second diaphragm, the third diaphragm, the fourth diaphragm and the laser power meter are arranged along a first direction according to a preset rule; the centers of the first diaphragm, the second diaphragm, the third diaphragm and the fourth diaphragm are positioned on the same optical axis and are used for limiting the width of the laser beam to be measured; the laser power meter is used for measuring the laser power value of the laser beam to be measured after the laser beam passes through the first diaphragm, the second diaphragm, the third diaphragm and the fourth diaphragm. The utility model discloses can be used to the laser beam of high-power, big facula to carry out the detection of divergence angle, improve detection speed and accuracy.
Description
Technical Field
The utility model belongs to laser detection device field especially relates to a detection device of laser beam divergence angle.
Background
Laser light is widely used in modern medicine as an energy output, and the beam divergence angle of the laser light is of great significance to the intended treatment. The detection of the beam divergence angle in the standards 0307 and 2011, YY0844-2011, YY0845-2011, YY1300-2016 and YY1301-2016 are cited as the detection method in ISO 11146. The beam divergence angle with larger laser output power and larger spot size is suitable for the diaphragm method in ISO 11146-3. At present, corresponding equipment and instruments are not available for detection by a diaphragm method, and a method for manually constructing a light path is adopted, so that the workload is high, the time is consumed, and a large error exists.
Disclosure of Invention
An object of the utility model is to provide a detection device of laser beam divergence angle to prior art's not enough.
The purpose of the utility model is realized through the following technical scheme: a detection device for the divergence angle of a laser beam comprises a first diaphragm, a second diaphragm, a third diaphragm, a fourth diaphragm and a laser power meter; the first diaphragm, the second diaphragm, the third diaphragm, the fourth diaphragm and the laser power meter are arranged along the linear direction; the centers of the first diaphragm, the second diaphragm, the third diaphragm and the fourth diaphragm are positioned on the same optical axis; the aperture of the first diaphragm 10 and the aperture of the fourth diaphragm 13 are 0-20 mm, and the aperture of the second diaphragm 11 and the aperture of the third diaphragm 12 are 20-100 mm.
Further, the width of the laser beam to be measured is less than 20 mm; the first diaphragm, the second diaphragm, the third diaphragm, the fourth diaphragm and the laser power meter are sequentially arranged along the straight line direction.
Further, the width of the laser beam to be detected is more than or equal to 20mm and less than 100 mm; the first diaphragm, the second diaphragm, the third diaphragm, the laser power meter and the fourth diaphragm are sequentially arranged along the straight line direction.
Further, the device also comprises a guide rail, a laser clamp to be tested and a concentric shaft indicator; the guide rail extends along a straight line direction; the first diaphragm, the second diaphragm, the third diaphragm, the fourth diaphragm and the laser power meter are in sliding connection with the guide rail; and the laser device to be tested for emitting the laser beam to be tested is arranged on the laser clamp to be tested.
Further, the device also comprises a guide rail supporting part; the first diaphragm, the second diaphragm, the third diaphragm, the fourth diaphragm and the laser power meter are all in sliding connection with the guide rail through guide rail supporting parts; the first diaphragm is connected with the guide rail supporting part through an optical connecting rod and an adjustable angle connecting rod clamp.
Further, the height of the rail supporting part ranges from 15cm to 25 cm.
Furthermore, the guide rail is a guide rail with scales, is made of steel, and has a length range of 100-120 cm, a width range of 5-8 cm, a height range of 1-5 cm and a precision of 1 mm.
Furthermore, a groove is arranged on the laser clamp to be tested, the height range of the groove is 10 mm-80 mm, and the width range of the groove is 10 mm-80 mm.
Furthermore, the concentric axis indicator is a laser, the wavelength of the peak value of the laser is between 400nm and 800nm, and the output power is less than or equal to 1 mW.
Further, the output center of the laser and the centers of the first diaphragm, the second diaphragm, the third diaphragm and the fourth diaphragm are located on the same optical axis.
The utility model has the advantages that: the utility model relates to a detection device for the divergence angle of a laser beam, which arranges a first diaphragm, a second diaphragm, a third diaphragm, a fourth diaphragm and a laser power meter along a first direction according to a preset rule; the centers of the four diaphragms are positioned on the same optical axis and are used for limiting the width of the laser beam to be measured; the laser power meter is used for measuring the laser power value of the laser beam to be measured after the laser beam passes through the diaphragm. The utility model discloses can be used to the laser beam of high-power, big facula to carry out the detection of divergence angle, improve detection speed and accuracy.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings:
FIG. 1 is a schematic structural view of the present invention for testing the divergence angle of the laser beam with the width of the measured laser beam less than 20 mm;
FIG. 2 is a schematic structural view of the present invention for testing the beam divergence angle of the laser beam to be tested, which is greater than or equal to 20mm and less than 100 mm;
FIG. 3 is a schematic view of an adjustable angle extension rod clamp used in the present embodiment;
in the figure: the device comprises a guide rail 1, a laser clamp 2 to be tested, a guide rail supporting part 3, a concentric axis indicator 9, a first diaphragm 10, a second diaphragm 11, a third diaphragm 12, a fourth diaphragm 13 and a laser power meter 14.
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 relevant invention and are not limiting of the invention. It should be noted that, for convenience of description, only the relevant portions of the related inventions are shown in the drawings.
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Referring to fig. 1, it shows a schematic structural diagram of an embodiment of the device for detecting a laser beam divergence angle according to the present invention, which tests a laser beam divergence angle of a measured laser beam width smaller than 20 mm. As shown in fig. 1, the detection device of the laser beam divergence angle in the present embodiment includes a first diaphragm 10, a second diaphragm 11, a third diaphragm 12, a fourth diaphragm 13, and a laser power meter 14. The first diaphragm 10, the second diaphragm 11, the third diaphragm 12, the fourth diaphragm 13 and the laser power meter 14 are sequentially arranged along a first direction; the centers of the first diaphragm 10, the second diaphragm 11, the third diaphragm 12 and the fourth diaphragm 13 are positioned on the same optical axis and are used for limiting the width of the laser beam to be measured; the aperture of the first diaphragm 10 and the aperture of the fourth diaphragm 13 are 0-20 mm, and the aperture of the second diaphragm 11 and the aperture of the third diaphragm 12 are 20-100 mm. The laser power meter 14 is used for measuring the laser power value of the laser beam to be measured after the laser beam passes through the first diaphragm 10, the second diaphragm 11, the third diaphragm 12 and the fourth diaphragm 13 in sequence. The first direction is vertical to the second direction; in this embodiment, when the detecting device is placed on a horizontal table, the horizontal x direction is a first direction, and the y direction is a second direction.
In some optional implementations of this embodiment, the apparatus further includes: the device comprises a guide rail 1, a laser clamp 2 to be tested and a concentric shaft indicator 9. The guide rail 1 extends in a first direction, and the first diaphragm 10, the second diaphragm 11, the third diaphragm 12, the fourth diaphragm 13 and the laser power meter 14 are placed on the guide rail 1 so that the first diaphragm 10, the second diaphragm 11, the third diaphragm 12, the fourth diaphragm 13 and the laser power meter 14 can slide in the first direction. The laser clamp 2 to be tested is used for fixing a laser device to be tested for emitting laser beams to be tested. The concentric shaft indicator 9 is used for indicating the position of the optical axis, and is convenient for adjusting the center of the laser beam to be measured to the optical axis.
In some alternative implementations of this embodiment, the apparatus further comprises a rail supporting portion 3. The first diaphragm 10, the second diaphragm 11, the third diaphragm 12, the fourth diaphragm 13 and the laser power meter 14 are all connected with the guide rail 1 in a sliding mode through the guide rail supporting part 3, and the guide rail supporting part 3 can drive the first diaphragm 10, the second diaphragm 11, the third diaphragm 12, the fourth diaphragm 13 and the laser power meter 14 to slide on the guide rail.
In some alternative implementations of this embodiment, the height of the rail supporting part 3 ranges from 15cm to 25 cm; the first diaphragm 10 is connected with the guide rail supporting part 3 through an optical connecting rod and an adjustable angle connecting rod clamp, so that the first diaphragm 10 can rotate and be fixed at any angle in a yz vertical plane. The adjustable angle connecting rod clamp adopted by the embodiment is shown in figure 3 and is M-MCA-2 of Nippon corporation of America. The first diaphragm 10 and the optical connecting rod connected with the guide rail supporting part 3 are respectively inserted into two clamping holes of the connecting rod clamp with adjustable angle, the angle is fixed by screwing, and the angle is adjusted by unscrewing the bolt.
In some optional implementations of this embodiment, the guide rail 1 is a guide rail with scales, and is made of steel, and has a length ranging from 100cm to 120cm, a width ranging from 5cm to 8cm, a height ranging from 1cm to 5cm, and a precision of 1 mm.
In some optional implementation manners of this embodiment, a groove is formed in the laser clamp 2 to be tested, the groove is used for fixing the laser device to be tested, the height range of the groove is 10mm to 80mm, and the width range of the groove is 10mm to 80 mm.
In some optional implementations of this embodiment, the concentric indicator 9 is a laser, the wavelength of the peak of the laser is between 400nm and 800nm, and the output power is less than or equal to 1 mW.
In some optional implementations of the present embodiment, the output center of the concentric axis indicator 9 is located on the same optical axis as the centers of the first, second, third and fourth diaphragms 10, 11, 12 and 13.
With continued reference to fig. 1, a specific embodiment of the detection device for detecting a laser beam width smaller than 20mm divergence angle of the present invention is shown. As can be seen from fig. 1, when measuring the divergence angle of the laser beam to be measured, first, the laser device to be measured is placed in the groove of the laser clamp 2 to be measured, and the height of the laser clamp 2 to be measured is adjusted, so that the divergence center of the laser beam to be measured and the laser emitted from the concentric axis indicator 9 coincide with each other at the optical axis. Then, the aperture of the second diaphragm 11 and the aperture of the third diaphragm 12 are adjusted to be the maximum, so that the aperture does not influence the laser beam to be measured. The first diaphragm 10, the fourth diaphragm 13 and the rail supporting portion 3 of the laser power meter 14 are adjusted to an appropriate distance, and the distance L1 between the first diaphragm 10 and the fourth diaphragm 13 on the rail 1 is recorded. Then, the first diaphragm 10 and the third diaphragm 13 are adjusted to the maximum aperture, the center of the laser power meter 14 is adjusted to the optical axis, and the emission power value of the laser beam to be measured after passing through the first diaphragm 10, the second diaphragm 11, the third diaphragm 12 and the fourth diaphragm 13 in sequence is tested and recorded as P1. Then, keeping the fourth diaphragm 13 as the maximum aperture, continuously adjusting the aperture size of the first diaphragm 10, observing the display value of the laser power meter 14 in real time, stopping adjusting the first diaphragm 10 when the display value of the laser power meter 14 is 1/e times of P1, and recording the aperture size D1 of the first diaphragm 10 at the moment; where e is a natural constant. Then, the aperture of the first diaphragm 10 is adjusted to the maximum aperture, the aperture of the fourth diaphragm 13 is continuously adjusted, the display value of the laser power meter 14 is observed in real time, when the display value of the laser power meter 14 is 1/e times of P1, the adjustment of the fourth diaphragm 13 is stopped, and the aperture of the fourth diaphragm 13 at the moment is recorded as D2. Finally, the divergence angle theta of the laser beam to be measured is calculated according to the following formula of the divergence angle of the beam:
referring to fig. 2, it shows a schematic structural diagram of an embodiment of the detection apparatus for detecting the divergence angle of the laser beam according to the present invention, which tests the divergence angle of the laser beam to be detected, which is greater than or equal to 20mm and less than 100 mm. As shown in fig. 2, the first diaphragm 10, the second diaphragm 11, the third diaphragm 12, the laser power meter 14, and the fourth diaphragm 13 in the present embodiment are arranged in this order along the first direction; the laser power meter 14 is used for measuring the laser power value of the laser beam to be measured after the laser beam passes through the second diaphragm 11 and the third diaphragm 12 in sequence.
Continuing to refer to fig. 2, it is a specific embodiment of the detection apparatus for detecting the divergence angle of the laser beam width of the present invention, which is greater than or equal to 20mm and less than 100 mm. As can be seen from fig. 2, when measuring the divergence angle of the laser beam to be measured, the laser device to be measured is first placed in the groove of the laser clamp 2 to be measured, and the height of the laser clamp 2 to be measured is adjusted so that the divergence center of the laser beam to be measured coincides with the laser emitted from the concentric axis indicator 9 at the optical axis. Secondly, loosening the bolt of the angle-adjustable connecting rod clamp, rotating the first diaphragm 10 from a vertical state to a horizontal state, and screwing the bolt at a fixed position to ensure that the aperture of the laser beam to be measured does not pass through the first diaphragm 10, the second diaphragm 11 and the third diaphragm 12 is adjusted to be maximum. The second diaphragm 11, the third diaphragm 12 and the rail supporting portion 3 of the laser power meter 14 are adjusted to an appropriate distance, and the distance L2 between the second diaphragm 11 and the third diaphragm 12 on the rail 1 is recorded. Then, the center of the laser power meter 14 is adjusted to the optical axis, and the emission power value of the laser beam to be measured after passing through the second diaphragm 11 and the third diaphragm 12 in sequence is tested and recorded as P2. Then, the aperture size of the second aperture 11 is continuously adjusted while keeping the third aperture 12 at the maximum aperture, and the display value of the laser power meter 14 is observed in real time, when the display value of the laser power meter 14 is 1/e times of P2, the adjustment of the second aperture 11 is stopped, and the aperture size D3 of the second aperture 11 at this time is recorded. Then, the aperture of the second diaphragm 11 is adjusted to the maximum aperture, the aperture of the third diaphragm 12 is continuously adjusted, the display value of the laser power meter 14 is observed in real time, when the display value of the laser power meter 14 is 1/e times of P2, the adjustment of the third diaphragm 12 is stopped, and the aperture of the third diaphragm 12 at the moment is recorded as D4. Finally, the divergence angle theta of the laser beam to be measured is calculated according to the following formula of the divergence angle of the beam:
the detection device for the laser beam divergence angle disclosed by the above example can meet the requirements of testing the laser beam divergence angle of which the laser beam width is less than 20mm and the laser beam width is more than or equal to 20mm and less than 100mm, and has the advantages of convenient operation, time saving and high testing precision.
Claims (10)
1. The device for detecting the divergence angle of the laser beam is characterized by comprising a first diaphragm, a second diaphragm, a third diaphragm, a fourth diaphragm and a laser power meter; the first diaphragm, the second diaphragm, the third diaphragm, the fourth diaphragm and the laser power meter are arranged along the linear direction; the centers of the first diaphragm, the second diaphragm, the third diaphragm and the fourth diaphragm are positioned on the same optical axis; the aperture of the first diaphragm and the aperture of the fourth diaphragm are 0-20 mm, and the aperture of the second diaphragm and the aperture of the third diaphragm are 20-100 mm.
2. The apparatus for detecting the divergence angle of a laser beam according to claim 1, wherein the width of the laser beam to be detected is less than 20 mm; the first diaphragm, the second diaphragm, the third diaphragm, the fourth diaphragm and the laser power meter are sequentially arranged along the straight line direction.
3. The apparatus for detecting the divergence angle of a laser beam according to claim 1, wherein the width of the laser beam to be detected is 20mm or more and less than 100 mm; the first diaphragm, the second diaphragm, the third diaphragm, the laser power meter and the fourth diaphragm are sequentially arranged along the straight line direction.
4. The apparatus for detecting the divergence angle of a laser beam according to claim 1, further comprising a guide rail, a laser clamp to be tested, and a concentric axis indicator; the guide rail extends along a straight line direction; the first diaphragm, the second diaphragm, the third diaphragm, the fourth diaphragm and the laser power meter are in sliding connection with the guide rail; and the laser device to be tested for emitting the laser beam to be tested is arranged on the laser clamp to be tested.
5. The apparatus for detecting a laser beam divergence angle according to claim 4, further comprising a rail supporting portion; the first diaphragm, the second diaphragm, the third diaphragm, the fourth diaphragm and the laser power meter are all in sliding connection with the guide rail through guide rail supporting parts; the first diaphragm is connected with the guide rail supporting part through an optical connecting rod and an adjustable angle connecting rod clamp.
6. The apparatus for detecting a laser beam divergence angle according to claim 5, wherein the height of the rail supporting portion is in a range of 15cm to 25 cm.
7. The apparatus for detecting the divergence angle of a laser beam according to claim 4, wherein the guide rail is a guide rail with scales, and is made of steel, and has a length ranging from 100cm to 120cm, a width ranging from 5cm to 8cm, a height ranging from 1cm to 5cm, and a precision of 1 mm.
8. The apparatus for detecting the divergence angle of a laser beam according to claim 4, wherein the laser clamp to be detected is provided with a groove, the groove has a height ranging from 10mm to 80mm and a width ranging from 10mm to 80 mm.
9. The apparatus for detecting the divergence angle of a laser beam according to claim 4, wherein the concentric axis indicator is a laser, the wavelength of the peak of the laser is between 400nm and 800nm, and the output power is less than or equal to 1 mW.
10. The apparatus for detecting the divergence angle of a laser beam according to claim 9, wherein the center of the output of the laser is located on the same optical axis as the centers of the first, second, third, and fourth diaphragms.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022267274.0U CN213179906U (en) | 2020-10-13 | 2020-10-13 | Detection apparatus for laser beam divergence angle |
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| CN202022267274.0U CN213179906U (en) | 2020-10-13 | 2020-10-13 | Detection apparatus for laser beam divergence angle |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114166097A (en) * | 2021-10-28 | 2022-03-11 | 中国科学院合肥物质科学研究院 | Real-time light beam angle measuring system using short optical fiber |
| CN114354135A (en) * | 2021-12-22 | 2022-04-15 | 广东粤港澳大湾区硬科技创新研究院 | Laser light spot measuring device and measuring method thereof |
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2020
- 2020-10-13 CN CN202022267274.0U patent/CN213179906U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114166097A (en) * | 2021-10-28 | 2022-03-11 | 中国科学院合肥物质科学研究院 | Real-time light beam angle measuring system using short optical fiber |
| CN114166097B (en) * | 2021-10-28 | 2023-12-08 | 中国科学院合肥物质科学研究院 | Real-time beam angle measurement system using short optical fiber |
| CN114354135A (en) * | 2021-12-22 | 2022-04-15 | 广东粤港澳大湾区硬科技创新研究院 | Laser light spot measuring device and measuring method thereof |
| CN114354135B (en) * | 2021-12-22 | 2024-05-17 | 广东粤港澳大湾区硬科技创新研究院 | Laser spot measuring device and measuring method thereof |
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