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Micro zooming structure for semiconductor laser light source

A technology of lasers and semiconductors, applied in the direction of semiconductor lasers, lasers, laser components, etc., can solve the problems of large overall structure of the light source and increased cost

Inactive Publication Date: 2005-05-18
INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if you want to continuously or randomly change the divergence of the beam, you must use a traditional zoom lens
This makes the overall structure of the light source large and the cost increases

Method used

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  • Micro zooming structure for semiconductor laser light source
  • Micro zooming structure for semiconductor laser light source
  • Micro zooming structure for semiconductor laser light source

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0028] The device designed according to the method of the present invention, such as image 3 As shown, a cylindrical lens 2 is placed at the front end of the laser 1, and the position of the cylindrical lens 2 should be to compress the light divergence angle in the vertical direction of the semiconductor laser to an appropriate ratio (such as 3 / 4 or 2 / 3). Place a self-focusing lens 3 with appropriate numerical aperture and diameter in the emission direction of the laser. The intercept of the self-focusing lens 3 is 0.25 or 0.23.

[0029] The laser light emitted by the laser passes through the lens 2 to form a light beam with a proper ratio of vertical and horizontal divergence angles. After passing through the self-focusing lens 3, the divergence angle of the output beam is determined by the distance between the laser 1 and the self-focusing lens 3. When the distance is 0, the output beam is approximately collimated, which is the minimum emission angle.

[0030] As a resu...

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Abstract

The micro zooming structure for semiconductor laser light source includes one laser; one lens pillar set in front of the laser to compress the laser divergence angle in the direction perpendicular to the semiconductor laser to 3 / 4 or 2 / 3 that in the horizontal direction; and one self-focusing lens with intercept of 0.25 or 0.23 set on the other end of the lens pillar. The distance between the self-focusing lens set in the laser emitting direction and the laser is continuously adjustable.

Description

technical field [0001] The invention relates to the application technology of semiconductor lasers, in particular to a micro-zoom structure for semiconductor laser light sources, especially the application method and structure when the laser is used as an illumination light source. Background technique [0002] Since the emission angle of the laser emitted by the semiconductor laser is very different in the vertical direction (usually about 20-40°) and the horizontal direction (usually about 6-10°), it is not suitable for direct use as an illumination source. In order to use a semiconductor laser as an illumination source, the usual practice is to couple the output of the semiconductor laser into an optical fiber, and use the optical fiber to shape the beam into a circular beam that diverges uniformly in all directions. In order to improve coupling efficiency, multimode fiber is used. Due to the interference effect of the laser in the multimode fiber, many interference spot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B3/00G02F1/00H01S3/10H01S5/00
Inventor 谢福增
Owner INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI