Negative-film spark-degree adjustment method and device for rotating-mirror high-speed camera

Abstract

The invention relates to the field of high-speed photography and photoelectric measurement and aims at providing a high-precision negative-film spark-degree adjustment method for a high-speed camera. Specific steps of the negative-film spark-degree adjustment method for the rotating-mirror high-speed camera are as follows: firstly determining a degree which is needed by sparks generated by a physical experiment so as to be recorded on a negative film of the rotating-mirror high-speed cameral; projecting infrared laser transmitted by a laser device to a high-speed rotating mirror in the camera after the infrared laser undergoes beam expansion and collimation by a light emission system; a light receiving system receiving laser beams reflected by the high-speed rotating mirror and laser beams which enter the light receiving system becoming light synchronization signals; carrying out photoelectric conversion on the light synchronization signals so that electric synchronization signals are obtained; the electric synchronization signals undergo processing of a processing circuit processing so as to generate spark degree adjustment pulse signals needed by the degree which is needed by the sparks generated by the physical experiment so as to be recorded on the negative film of the rotating-mirror high-speed camera; and at last, controlling a shutter of the camera to shoot according to the spark degree adjustment pulse signals. The negative-film spark-degree adjustment method and device are applicable to a high-speed rotating-mirror type camera.

Description

technical field [0001] The invention relates to the fields of high-speed photography and photoelectric measurement, in particular to the adjustment of the degree of sparks on the film of a rotating mirror high-speed camera. Background technique [0002] Rotating-mirror high-speed camera is an important space-time resolution optical test equipment with 1×10 4 ~1×10 7 It occupies an important position in the field of high-speed photography and is widely used in the research of laboratory plasma, explosive mechanics and spark discharge. Through the high-speed rotation of the mirror, the subject is scanned on the camera film through the optical system, and the spatial information change of the camera film corresponds to the time change process of the subject. In a synchronous rotating mirror camera, the recording film is fixed and the length of the recording film generally does not exceed 90 degrees. However, physical experiments such as explosions and discharges recorded by h...

AI Technical Summary

Problems solved by technology

However, in actual situations, due to the influence of many factors such as the material performance of the electromagnetic sensor and the installation process, the actual voltage waveform of the magnetic sensor is irregular, which will cause the spark degree of the object to be imaged on the high-speed camera film to drift. , the accuracy of the adjustment of the spark degree of the film of the high-speed camera is low

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