Electromechanical composite dimming system for laser beam quality analyzer

A laser beam quality, electromechanical composite technology, applied in the direction of measuring instrument components, optics, instruments, etc., can solve the problems of small dynamic range, difficult to cascade work, non-linear dimming, etc., to achieve large dynamic range, easy to use, linear good effect
CN103309031BInactive Publication Date: 2015-09-09CHANGCHUN UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Patents(China)
Current Assignee / Owner
CHANGCHUN UNIV OF SCI & TECH
Publication Date
2015-09-09
Estimated Expiration
Not applicable ยท inactive patent

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Abstract

The invention provides a mechanical-electrical compound dimming system for a laser beam quality analyzer. The mechanical-electrical compound dimming system comprises a single-wheel variable optical attenuator, a CCD (charge coupled device) camera, a stepping motor, an electrical control system and a PC (personal computer). For an acquired image, an incident laser beam passes the single-wheel variable optical attenuator and is attenuated after shutter time is preset by the CCD camera, a new acquired spot image is processed by the PC, the electronic shutter time slot of the CCD camera is adjusted by the electrical control system according to a gray value, incident laser intensity is continuously attenuated by the aid of the single-wheel variable optical attenuator, linearity is fine, the dynamic range is wide, and a laser beam quality analyzer attenuation module is small in size and convenient to use. The dimming range of traditional optical wedge continuous attenuation of light intensity in the laser beam quality analyzer is narrow and is about 20-300 times, and the dimming system obtains the wide dynamic dimming range of 5000 times.
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Description

technical field

[0001] The invention belongs to the field of optoelectronic technology, and relates to an electromechanical composite dimming system for a laser beam quality analyzer. A mechanical single-wheel variable optical attenuator is cascaded with an electronic shutter of a CCD camera to realize continuous attenuation of laser light intensity. Background technique

[0002] In the research of the laser beam parameter measurement and evaluation system using the laser beam quality analyzer, due to the high sensitivity and low saturation light intensity of the area array CCD detection device, the aberration-free continuous attenuation of the measured beam becomes a key point in the measurement process. technology. Commonly used continuous dimming technologies mainly include: mechanical diaphragm continuous dimming technology, photoelectric continuous dimming technology, continuous dimming technology using absorption gradient attenuation film and crystal absorption continu...

Claims

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