CN102819112A - Laser beam homogenizing device - Google Patents
Laser beam homogenizing device Download PDFInfo
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- CN102819112A CN102819112A CN2012103088528A CN201210308852A CN102819112A CN 102819112 A CN102819112 A CN 102819112A CN 2012103088528 A CN2012103088528 A CN 2012103088528A CN 201210308852 A CN201210308852 A CN 201210308852A CN 102819112 A CN102819112 A CN 102819112A
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- optical fiber
- laser beam
- piezoelectric ceramics
- laser
- beam homogenizer
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Abstract
A laser beam homogenizing device comprises a laser, a bare optical fiber, a hollow piezoelectric ceramic, a collimating lens and a waveform generator, wherein the input end of the optical fiber is connected with a luminous surface of the laser in an optical coupling mode, the optical fiber is wound on the outer wall of the piezoelectric ceramic, the collimating lens is arranged behind the optical fiber and on the output light path of the optical fiber, one end of the waveform generator is connected to the outer wall of the piezoelectric ceramic, and the other end of the waveform generator is connected to the inner wall of the piezoelectric ceramic. The laser beam homogenizing device can overcome the defect of existing laser beam homogenizing technology and can guarantee high homogenization of the laser beam at the same time.
Description
Technical field
The present invention relates to a kind of laser beam homogenizer; It is even emitted laser light source; The uniform LASER Light Source of two-dimensional illumination intensity distribution cross section light distribution particularly; Utilize this programme, can be in two dimensional surface, the CCD and the human eye that are no more than 50Hz through frame frequency can be seen the light intensity distributions uniform image.
Background technology
In existing laser night vision system; Its image device is generally CCD or cmos device; If the laser radiation hot spot is inhomogeneous, then its vivid effect can be poor, and all there is certain defective in existing laser homogenization technology; Therefore need a kind of this system that is fit to, do not lose the new technique of light simultaneously.
Summary of the invention:
The objective of the invention is to, a kind of laser beam homogenizer is provided, it can overcome the evenly shortcoming of technology existence of existing laser, guarantees LASER Light Source height homogenising simultaneously.
The present invention provides a kind of laser beam homogenizer, comprising:
One laser instrument;
One optical fiber: this optical fiber is bare fibre, and the input end of this optical fiber adopts optically-coupled to be connected with the light-emitting area of laser instrument;
One piezoelectric ceramics is hollow structure, and the outer wall of this piezoelectric ceramics is twining optical fiber;
One collimation lens, this collimation lens are positioned at after the optical fiber and are positioned on the output light path of optical fiber;
One waveform generator, the outer wall of a termination piezoelectric ceramics of this waveform generator, the inwall of another termination piezoelectric ceramics.
Wherein laser instrument is a semiconductor laser.
Wherein length of fiber is greater than 1 meter, and external diameter is less than 2mm, and the output terminal of this optical fiber is positioned on the focus of collimation lens.
Wherein the external diameter of piezoelectric ceramics is 3-10cm, and internal diameter is 2.5-9.5cm, and length is 12cm.
Wherein collimation lens is convex lens, and focal length is 20mm.
Laser beam homogenizer of the present invention, it can evenly launch laser beam, and compared with prior art, it is hot spot being significantly improved aspect even, and realizes that difficulty is little.
Description of drawings:
For making the object of the invention, technical scheme and advantage clearer, below in conjunction with specific embodiment and accompanying drawing, to further explain of the present invention.Though this paper can provide the demonstration of the parameter that comprises particular value, should be appreciated that parameter need not definitely to equal corresponding value, but can in acceptable error margin or design constraint, be similar to said value, wherein:
Fig. 1 is the structural representation of laser beam homogenizer of the present invention;
Fig. 2 stretches through optical fiber for laser beam A input has the synoptic diagram of different directions laser output at its light output end.
Embodiment
See also shown in Figure 1ly, the present invention provides a kind of laser beam homogenizer, comprising:
One laser instrument 1, this laser instrument 1 is a semiconductor laser; Its effect is to send laser as light source.
One optical fiber 2, this optical fiber 2 is the bare fibre of quartz material, and the length of this optical fiber 2 is greater than 1 meter, and external diameter is less than 2mm, and its effect is the light that transmission laser sends, and plays the leaded light effect.
One piezoelectric ceramics 3 is hollow structure, and the outer wall of this piezoelectric ceramics 3 is wound with optical fiber 2, and this piezoelectric ceramics 3 is positioned at the inboard of optical fiber 2; The external diameter of this piezoelectric ceramics 3 is 3-10cm, and internal diameter is 2.5-9.5cm, and length is 12cm, its effect be piezoelectric ceramics under the cycling driven of follow-up waveform generator 5, its external diameter betides the consistent periodicity telescopic variation of drive signal.
One collimation lens 4, this collimation lens 4 are positioned at after the optical fiber defeated 2 and are positioned on the output light path of optical fiber 2; The output terminal of said optical fiber 2 is positioned on the focus of collimation lens 4, and this collimation lens 4 is convex lens, and focal length is 20mm, and its effect is to collimate the light of laser output, reduces laser output dispersion angle.
One waveform generator 5, the outer wall of a termination piezoelectric ceramics 3 of this waveform generator 5, the inwall of another termination piezoelectric ceramics 3, its effect is for electroceramics 3 provides driving voltage, thereby changes the stroke of piezoelectric ceramics.
Above-mentioned described piezoelectric ceramics 3 is used to make the optical fiber 2 that is wrapped on its external diameter to take place flexible; Make the inner laser optical paths of optical fiber 2 change (as shown in Figure 2); Laser beam A input is stretched through optical fiber 2 has the output of different directions laser at its light output end; This makes the laser of different shooting angles all at the place, light output end arbitrfary point of optical fiber 2 the energy stack arranged; Thereby make the defective place of original hot spot and original hot spot not have the place of defective on CCD or human eye vision, to superpose, being beneficial to CCD and human eye vision has certain integral time, thereby the strength ratio that the hot spot of output was embodied in the unit interval is more even.
The above; Be merely the embodiment among the present invention, but protection scope of the present invention is not limited thereto, anyly is familiar with this technological people in the technical scope that the present invention disclosed; The conversion that can expect easily or replacement all should be encompassed in of the present invention comprising within the scope.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.
Claims (5)
1. laser beam homogenizer comprises:
One laser instrument;
One optical fiber: this optical fiber is bare fibre, and the input end of this optical fiber adopts optically-coupled to be connected with the light-emitting area of laser instrument;
One piezoelectric ceramics is hollow structure, and the outer wall of this piezoelectric ceramics is twining optical fiber;
One collimation lens, this collimation lens are positioned at after the optical fiber and are positioned on the output light path of optical fiber;
One waveform generator, the outer wall of a termination piezoelectric ceramics of this waveform generator, the inwall of another termination piezoelectric ceramics.
2. according to the described laser beam homogenizer of claim 1, wherein laser instrument is a semiconductor laser.
3. according to the described laser beam homogenizer of claim 1, wherein length of fiber is greater than 1 meter, and external diameter is less than 2mm, and the output terminal of this optical fiber is positioned on the focus of collimation lens.
4. according to the described laser beam homogenizer of claim 1, wherein the external diameter of piezoelectric ceramics is 3-10cm, and internal diameter is 2.5-9.5cm, and length is 12cm.
5. according to the described laser beam homogenizer of claim 1, wherein collimation lens is convex lens, and focal length is 20mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103088528A CN102819112A (en) | 2012-08-27 | 2012-08-27 | Laser beam homogenizing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103088528A CN102819112A (en) | 2012-08-27 | 2012-08-27 | Laser beam homogenizing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102819112A true CN102819112A (en) | 2012-12-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012103088528A Pending CN102819112A (en) | 2012-08-27 | 2012-08-27 | Laser beam homogenizing device |
Country Status (1)
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| CN (1) | CN102819112A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114280771A (en) * | 2021-12-10 | 2022-04-05 | 中国科学院西安光学精密机械研究所 | Method for building laser spot homogenization system for fiber laser and system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11344306A (en) * | 1998-06-01 | 1999-12-14 | Toshihiko Yoshino | Optical displacement measuring apparatus |
| CN1790094A (en) * | 2004-12-15 | 2006-06-21 | 三星电子株式会社 | Illumination system to eliminate laser speckle and projection system employing the same |
| CN201387516Y (en) * | 2009-02-25 | 2010-01-20 | 北京中视中科光电技术有限公司 | Speckle eliminating device and laser projector using same |
-
2012
- 2012-08-27 CN CN2012103088528A patent/CN102819112A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11344306A (en) * | 1998-06-01 | 1999-12-14 | Toshihiko Yoshino | Optical displacement measuring apparatus |
| CN1790094A (en) * | 2004-12-15 | 2006-06-21 | 三星电子株式会社 | Illumination system to eliminate laser speckle and projection system employing the same |
| CN201387516Y (en) * | 2009-02-25 | 2010-01-20 | 北京中视中科光电技术有限公司 | Speckle eliminating device and laser projector using same |
Non-Patent Citations (1)
| Title |
|---|
| 朱广志等: ""摆动反射镜实现高功率激光束的平滑化"", 《中国激光》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114280771A (en) * | 2021-12-10 | 2022-04-05 | 中国科学院西安光学精密机械研究所 | Method for building laser spot homogenization system for fiber laser and system |
| CN114280771B (en) * | 2021-12-10 | 2022-10-04 | 中国科学院西安光学精密机械研究所 | Method for building laser spot homogenization system for fiber laser and system |
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Application publication date: 20121212 |