Large-aperture rolling shutter of astronomical telescope CCD camera

Abstract

The invention provides a large-aperture rolling shutter of an astronomical telescope CCD camera. The center of a shutter cloth is provided with an exposure window. Two ends of the shutter cloth are respectively rolled at two shutter rolling shafts which are connected with shutter motors respectively. The large-aperture rolling shutter is characterized in that the two shutter rolling shafts are connected with position encoders respectively, the outputs of the two position encoders are connected with a position motion controller respectively, the position motion controller is connected with a control computer and is connected with the shutter motors through a motor driving circuit respectively, the control computer controls the motion of the two shutter motors through the position motion controller and the motor driving circuit to control the opening and closing of the shutter. According to the large-aperture rolling shutter, the shortcoming in the prior art is compensated, the large-aperture shutter can satisfy the need of an astronomical telescope large visual field CCD camera, and at the same time, the large-aperture rolling shutter has the advantages of fast reaction rate, less light baffling, high mechanical strength, relatively large shutter transmission aperture, no shutter effect in exposure, and little possibility of fatigue.

Description

technical field [0001] The invention relates to a camera shutter, in particular to a large-diameter rolling shutter of an astronomical telescope CCD camera. Background technique [0002] A camera shutter is the part that controls light reaching the film or light-sensitive element and is an essential part of any camera. There are many types of shutters, usually with feathers or cloth curtains. Commercial camera shutters usually have a relatively small aperture and are relatively easy to manufacture; and cameras used in astronomy, especially cameras with large fields of view, have The photosensitive area of ​​the camera is relatively large, so a shutter with a relatively large aperture is required to control the exposure of the camera. The world's largest astronomical CCD camera has a shutter aperture of more than 90cm. The production of large shutters is relatively complicated. The shutter production technology represented by German manufacturers is the most advanced in the...

AI Technical Summary

Problems solved by technology

Some CCD cameras used in astronomy have a very large field of view, also known as a large field of view CCD camera, and there are no commercially available large-aperture clear shutters.

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