Large-diameter aperture adjustment device

Abstract

The invention discloses a large-diameter aperture adjustment device, which includes a mounting frame, and the aperture adjustment mechanism and a driving device for driving the aperture adjustment mechanism to rotate to change the aperture size are arranged in the installation frame; The flange adjustment mechanism includes a driving wheel and a driven wheel, the outer circumference of the driving wheel and the driven wheel are fixedly connected to form a cage structure through several roller shafts arranged at intervals along the circumferential direction; the inner cavity of the driving wheel and the driven wheel is provided with An aperture adjustment assembly, the aperture adjustment assembly includes a helical fixing ring and several diaphragms arranged at intervals along the circumference of the helical fixing ring, the middle parts of the several diaphragms enclose a light hole with adjustable diameter. The invention drives the aperture adjustment mechanism to rotate through the driving device to change its aperture size, and the aperture plate is provided with a photoreceptor for sensing the beam signal, which is fed back to the control center through the photoreceptor to sense the beam signal, so as to realize the aperture size of the light hole It can be adjusted continuously and automatically.

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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