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Device for adjusting curvature radius of cylindrical mirror

A technology of cylindrical mirror and surface mirror, which is applied in the field of lasers, can solve the problems of reduced laser energy conversion efficiency, increased laser loss, difficult laser device adoption, etc., to achieve the effects of avoiding laser damage, maintaining stable operation, and easy assembly

Active Publication Date: 2014-04-02
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But there is following problem in above-mentioned compensating device: the compensating method of this compensating device is to make the distance of rod and lens equal to " sum of thermal lens focal length and lens focal length " promptly thermal lens and lens form Keplerian telescope, and this compensating device only when thermal When the focal length of the lens is very small, the "sum of the focal length of the thermal lens and the focal length of the lens" can be used for practical laser devices. The laser device adopts; inserting a cylindrical mirror into the optical resonator will increase the laser loss, which will lead to a decrease in the laser energy conversion efficiency

Method used

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  • Device for adjusting curvature radius of cylindrical mirror
  • Device for adjusting curvature radius of cylindrical mirror
  • Device for adjusting curvature radius of cylindrical mirror

Examples

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Effect test

Embodiment 1

[0046] Such as figure 1 As shown, one end of the ejector rod 5-1 connected to the ejector rod drive unit 5-3 is provided with an external thread, and the ejector rod drive unit 5-3 is provided with an internal thread matching the external thread, and the ejector rod drive unit 5-3 is rotated It can promote telescopic movement of the push rod 5-1 in the horizontal direction. The ejector rod 5-1 of this embodiment runs through the ejector rod support 5-2, and the ejector rod 5-1 and the ejector rod support 5-2 are connected by threads.

[0047] In this embodiment, the purpose of changing the radius of curvature R of the cylindrical mirror 2 is to change the force exerted by the ejector rod 5-1 on the outer surface a of the cylindrical mirror 2 by rotating the ejector rod driving unit 5-3. Such as figure 1 As shown, the minimum value of the change value Δx of the radius of curvature Δx of the cylindrical mirror 2 can be realized by manually adjusting the ejector rod drive unit ...

Embodiment 2

[0049] Such as Figure 4 , the ejector rod 5-1 is piezoelectric ceramic material, the ejector rod drive unit 5-3 is a piezoelectric ceramic power supply, the ejector rod 5-1 is connected to the ejector rod drive unit 5-3 through a cable, and the ejector rod support 5 in this embodiment The top of -2 has a card slot, and the ejector rod 5-1 is installed in the card slot, and the ejector rod 5-1 can move horizontally in the card slot. When there is no external voltage, the tip of the ejector rod 5-1 is in geometric contact with the pressure uniform distribution part c, and the voltage of the ejector rod drive unit 5-3 is adjusted to drive the ejector rod 5-1 to expand and contract, so that the ejector rod 5-1 acts on the column The force acting on the outer surface a of the mirror 2 changes, thereby achieving the purpose of changing the radius of curvature R of the inner surface b of the cylindrical mirror 2 .

[0050] Since the piezoelectric ceramic material can realize high-p...

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Abstract

The invention discloses a device for adjusting curvature radius of a cylindrical mirror, and the device comprises a clamping mechanism, a pressure uniformly-distributing part and an adjusting mechanism, wherein the clamping mechanism is used for fixing the cylindrical mirror; the pressure uniformly-distributing part is used for making the pressure applied by the adjusting mechanism onto the cylindrical mirror be uniformly distributed along the vertical direction of the outer surface of the cylindrical mirror; and the adjusting mechanism is connected with the outer surface of the cylindrical mirror through the pressure uniformly-distributing part and is used for applying the pressure to the cylindrical mirror so as to change the curvature of a curved surface of the cylindrical mirror.

Description

technical field [0001] The invention relates to the technical field of lasers, in particular to a device for adjusting the curvature radius of a cylindrical mirror. Background technique [0002] When the laser is working, the pump light energy absorbed by the laser medium, except a part of it is output in the form of laser, most of the other energy is converted into heat and deposited in the laser working material to cause a temperature rise. Under the action of repeated pumping and heat conduction, The temperature gradient in the working substance is continuously increasing, and the existence of the temperature gradient in the working substance makes the working substance with a completely uniform refractive index become a lens-like medium, and the light beam is focused after passing through the working substance, commonly known as thermal self-focusing. Thermal self-focusing not only increases the divergence angle of the laser beam rapidly, which is not conducive to the su...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/136
Inventor 巩马理胡震岳黄磊柳强闫平张海涛
Owner TSINGHUA UNIV
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