Blade type rapid mechanical optical switch based on piezoelectric driving

Abstract

The invention relates to a blade type rapid mechanical optical switch based on piezoelectric driving. The blade type rapid mechanical optical switch mainly comprises an aperture diaphragm and a piezoelectric ceramic stack, wherein the aperture diaphragm is installed inside a metal shell, the piezoelectric ceramic stack and a return spring are respectively arranged on two sides of a blade control rod of the aperture diaphragm, the distance between a light through hole of the aperture diaphragm and fixing screws of the aperture diaphragm is larger than the distance between the piezoelectric ceramic stack and the main fixing screw of the aperture diaphragm, and the piezoelectric ceramic stack is connected with an external power supply. The blade type rapid mechanical optical switch has the advantages that the problem of low response speed of the conventional mechanical optical switch is solved, the power of transmitted light is not lost, and the light path is not changed, so that the light path is greatly simplified, the manpower and material resource cost is saved, the use efficiency of laser is improved, and therefore, the use requirements of the fields with extremely high requirements on the response speed of the mechanical switch, such as current precision measurement physical and quantum optical experiments, can be met.

Description

technical field [0001] The present application relates to the field of optical switches, in particular to a blade-type fast mechanical optical switch driven by piezoelectricity. Background technique [0002] Commonly used mechanical optical switches mainly rely on thermal, electric, magnetic and other driving methods to use the mechanical movement of objects to let go or block light, so as to realize the on / off operation of light. At present, the mainstream mechanical optical switches have some shortcomings of their own. The more prominent problem is that the switching speed is relatively slow, usually above 10 milliseconds. This is mainly because most mechanical optical switches are driven by electric motors, resulting in slow response. In order to achieve fast switching of the beam, some mechanical optical switches use thin metal sheets as action shutters. Because the thin metal sheets are light in weight, this helps to improve the response speed, but the metal sheets cann...

AI Technical Summary

Problems solved by technology

At present, the mainstream mechanical optical switches have some shortcomings of their own. The more prominent problem is that the switching speed is relatively slow, usually above 10 milliseconds. This is mainly because most mechanical optical switches are driven by electric motors, resulting in slow response.

In order to achieve fast switching of the beam, some mechanical optical switches use thin metal sheets as action shutters. Because the thin metal sheets are light in weight, this helps to improve the response speed, but the metal sheets cannot withstand high-power lasers, and the light hole is small. In addition, because the traditional motor drive method is still used, there is also obvious vibration and noise when performing switching actions, which limits its use in places that require low noise and high power work. In addition, the response speed of this type of switch is also very high. Limited, the best can only reach about ten milliseconds

There are also mechanical optical switches that use one or more rotating motors for switching operations. The switching speed can reach the microsecond level, but certain vibrations are generated when the on / off operation is performed, and the light aperture is small, so the beam needs to be focused before use. , which requires more lenses and extremely careful calibration. In addition, this kind of switch is too bulky to be suitable for miniaturized optical paths.

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