Large aperture type diaphragm adjusting device

Abstract

The invention discloses a large aperture type diaphragm adjusting device comprising a mounting rack; a diaphragm adjusting mechanism and a drive device are arranged in the mounting rack; the drive device is used for driving the diaphragm adjusting mechanism to rotate, thus changing the aperture sizes; the diaphragm adjusting mechanism comprises a driving wheel and a driven wheel; the peripheries of the driving wheel and the driven wheel are fixedly connected via a plurality of roller shafts arranged at intervals in the peripheral direction, thus forming a cage-like structure; an aperture adjusting assembly is arranged in the cavity of the driving wheel and the driven wheel, and comprises a spiral fixed loop and a plurality of diaphragm sheets arranged at intervals in the peripheral direction of the spiral fixed loop, wherein a light through hole with an adjustable aperture is enclosed in middle of the plurality of diaphragm sheets. The large aperture type diaphragm adjusting device uses the drive device to drive the diaphragm adjusting mechanism to rotate so as to change the aperture sizes; the diaphragm sheet is provided with a photoreceptor used for perceiving a light beam signal; the photoreceptor perceives the light beam signal and feeds the signal to the control center, thus continuously and automatically adjusting the light through hole aperture sizes.

Description

technical field [0001] The invention relates to an aperture adjustment device, in particular to a large-diameter aperture adjustment device. Background technique [0002] In the research process of high-power lasers, it is necessary to carry out the performance verification of the beam spot, and the spot size is an important indicator of the performance of the feedback laser. At present, the measurement methods of laser spot size at home and abroad mainly include ablation method, CCD measurement method, spot array detector method, circular knife edge method, etc. The spot parameter testing equipment based on the above test methods mainly includes spot analyzer and beam profile analyzer. Wait. Among them, the Israel DumaOptronics spot analyzer, which is the agent of Top Science Instrument Co., Ltd., can analyze and test the parameters of the spot size, shape and energy distribution of the laser beam. At the same time, it can be connected to a computer for two-dimensional or ...

AI Technical Summary

Problems solved by technology

[0003] However, the test aperture of the existing spot aperture measurement equipment is relatively small, and the aperture size is fixed and cannot be adjusted, which cannot meet the continuous measurement of the target spot size in the far-field test. At the same time, the photosensitive test surface of the equipment can withstand The laser power density threshold is small, which cannot meet the measurement and analysis of high-power laser spot parameters

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