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Non-moving type adjustable focal length lens and light beam scanning structure

A beam scanning, mobile technology, applied in the field of laser and optics, can solve the problems of small change, high voltage required, slow speed, etc.

Inactive Publication Date: 2009-01-21
SHANGHAI BRANCH FUZHOU GAOYI COMM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] For a long time, people have adjusted the focal length of the combined lens by adjusting the relative position of the optical lens group lens to realize the adjustable change of the beam divergence angle. The disadvantage is that a mechanical adjustment device is required, and the speed is relatively slow, generally on the order of seconds; on the other hand When realizing the polarization of the beam direction, at the same time, mechanical mirror direction adjustment is used to change the direction of the continuous light beam. Acousto-optic devices are also used to continuously change the beam direction, and electro-optic devices are used to change the beam direction. However, due to the small amount of change or the required voltage high or too slow

Method used

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  • Non-moving type adjustable focal length lens and light beam scanning structure
  • Non-moving type adjustable focal length lens and light beam scanning structure
  • Non-moving type adjustable focal length lens and light beam scanning structure

Examples

Experimental program
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Effect test

Embodiment 1

[0023] As shown in Figure 1, 101 is the absorber of specific optical wavelength optical material, 103 wavelength is λ pump light, 104 wavelength is the light to be adjusted by λ1, wherein the optical absorber (101) absorption wavelength is λ pump light (103 ), to λ1 light (104) transmission, 102 is the optical substrate coated with the λ reflective pair 104λ transmissive film. It is known from the laser principle that when the optical element absorbs the pump light, a thermal lens will be formed due to the temperature gradient. For example, when a semiconductor laser pumps a solid laser gain material, a thermal lens is usually formed by the following formula (P409: "Solid Laser Engineering") [US] W. Kirchner, Science Press, 2002)

[0024] f = πkcWp 2 P H ( dn dt ...

Embodiment 2

[0028] Such as Figure 5 As shown, 101 is an optical absorber, 103 is a pump light with a wavelength of λ, and 104 is a light beam to be adjusted. The difference from Embodiment 1 is that the pump light is pumped from the side, and 204 is a converging lens. The optical absorber (101 ) will form a wedge-shaped refractive index change distribution, which can be equivalent to an optical wedge. When the pump power changes, the refractive index changes, so that the beam direction is polarized.

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PUM

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Abstract

The invention relates to an optical element structure for replacing general zooming lenses and light beam scanners, belonging to the laser and optics technical field. A fixed zooming lens and a light beam scanning structure at least comprise a pump light source for pumping an optical absorber capable of absorbing pumping lights, an optical absorber for absorbing pumping lights and changing refraction indexes according to the power or wavelength of pumping lights. The pump light source pumps the optical element capable of absorbing pumping lights, uses the intensity change of the pumping lights to change the focus of the optical thermal lens to change the diffusion angle or direction of lights after the thermal lens, thereby realizing the functions of a zooming lens or an optical scanner. The invention provides a novel optical element structure for replacing general zooming lens and light beam scanners.

Description

technical field [0001] The invention relates to the fields of laser and optics, in particular to an optical element structure that can replace conventional adjustable focus lenses and beam scanners. Background technique [0002] For a long time, people have adjusted the focal length of the combined lens by adjusting the relative position of the optical lens group lens to realize the adjustable change of the beam divergence angle. The disadvantage is that a mechanical adjustment device is required, and the speed is relatively slow, generally on the order of seconds; on the other hand When realizing the polarization of the beam direction, at the same time, mechanical mirror direction adjustment is used to change the direction of the continuous light beam. Acousto-optic devices are also used to continuously change the beam direction, and electro-optic devices are used to change the beam direction. However, due to the small amount of change or the required voltage high or too sl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/29H01S3/101
Inventor 吴砺凌吉武马英俊胡企铨
Owner SHANGHAI BRANCH FUZHOU GAOYI COMM CO LTD