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Threshold adjustable optical limiter

A limiter and optical technology, applied in optics, nonlinear optics, instruments, etc., can solve problems such as no optical limiter, and achieve the effects of convenient adjustment of the limiter threshold, easy manufacture, and low cost

Inactive Publication Date: 2009-07-29
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

However, after searching the existing technical literature, it is found that there is no technology to make an optical limiter with adjustable threshold by using the thermal lens effect of the material and the combination of the iris diaphragm.

Method used

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  • Threshold adjustable optical limiter
  • Threshold adjustable optical limiter
  • Threshold adjustable optical limiter

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Embodiment Construction

[0014] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0015] As shown in FIG. 1 , it is a schematic diagram of the overall structure of an optical limiter with adjustable threshold, which includes: a nonlinear refraction material 1 , an aperture 2 and a supporting package device 3 . The nonlinear refraction material 1 and the aperture 2 are placed in the supporting packaging device 3 , and their positional relationship is: the nonlinear refraction material 1 is in front of the aperture 2 , and the incident laser beam 7 passes through the nonlinear refraction material 1 and the aperture 2 in sequence.

[0016] The size of the clear aperture 9 of the diaphragm 2 can be adjusted by adjusting the knob 5 . The position of the aperture 2 relative to the nonlinear refraction material 1 can be changed by the adjusting device 6 . The incident laser beam 7 is a Gaussian beam or a quasi-Gaussian beam.

[...

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Abstract

The invention relates to an optical limiter with adjustable threshold, comprising a nonlinear refractive material, a diaphragm and a supporting encapsulation device; the nonlinear refractive material and the diaphragm are arranged in the supporting encapsulation device; wherein, the nonlinear refractive material is arranged in front of the diaphragm; the incident laser beam sequentially passes through the nonlinear refractive material and the diaphragm; the diaphragm is provided with a clear aperture with changeable size; and the position of the diaphragm corresponding to the nonlinear refractive material is changed by an adjusting device. Compared with the prior art, the optical limiter utilizes the combination of the thermal lens effect of the nonlinear refractive material and the changeable diaphragm, realizes the optical limiter with adjustable threshold, has simple structure, easy preparation and low cost, has convenient, online and real-time adjustment of the limiting threshold, can be applied to various situations, provides guarantee for the safe use of precise optical devices (including human eyes), and prompting the improvement of the laser protection technique.

Description

technical field [0001] The invention relates to a laser protection optical device in the field of physical laser experiment and application, in particular to an optical limiter. Background technique [0002] Since the advent of lasers, with the development and progress of laser technology, the maximum output power and laser intensity of lasers have become higher and higher, and scientific experiments and technical applications related to strong lasers have gradually deepened. Since strong laser light can easily damage human eyes, optical detectors, optical precision instruments, etc., certain protective measures must be taken. An optical limiter is an optical device that can achieve this protective effect. The working principle of the optical limiter is: for weak laser light, it has a high transmittance, while for strong laser light, its transmittance is low, so that the laser intensity passing through the optical limiter is limited to a certain Below the maximum value (no...

Claims

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Application Information

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IPC IPC(8): G02F1/35
Inventor 卜胜利
Owner UNIV OF SHANGHAI FOR SCI & TECH
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