High-precision electronically controlled aperture device

Abstract

The invention provides a high-precision type electric control diaphragm device. The device comprises a double-arc diaphragm, a driving mechanism, a transmission mechanism, limiting switches, a controller, and a base of which the bottom part is provided with a circular light opening, wherein the driving mechanism is arranged on the base and connected with the controller; the transmission mechanism comprises a guider rail sliding block pair arranged on the base, and lead screws which are parallel to the guide rail sliding block pair and arranged at two sides of the circular light opening; the lead screws are arranged in the power output direction of the driving mechanism; one end of each lead screw is connected with the driving mechanism and while the other end of each lead screw is fixed to the side part of the base; the double-arc diaphragm is arranged on the guide rail sliding block pair and the lead screws, wherein the double-arc diaphragm is sheet shaped, and the contour line of the double-arc diaphragm comprises a first arc side and a second side which encircle a loudspeaker shaped opening and provided with a common end point; the arc radius of the first arc side and the second arc side is in match with the aperture of the circular light opening; the limiting switches are fixed to two ends of the guide rail sliding block pair and connected with the controller and are higher than the guide rail sliding block pair. The device is free of the maximum diaphragm aperture problem and can linearly adjust the light strength.

Description

technical field [0001] The invention belongs to the technical field of optical adjustment, and relates to an adjustable aperture device, in particular to a high-precision electric control aperture device which has no minimum aperture problem and can realize linear adjustment of light intensity. Background technique [0002] The star sensor is a high-precision attitude sensor, which uses stars at different positions on the celestial sphere as detection targets to determine the operating attitude of the spacecraft. The star simulator is a simulation device for the star magnitude, spectrum, angular distance and other indicators of starlight, and completes the performance detection and calibration of the star sensor. It is mainly composed of collimator, star point plate, bandpass filter and light source. composition. In the actual test process, the bandpass filter and the star point plate are placed on the focal plane of the collimator, and the infinite star map is simulated af...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the technical problems in the background technology that the light intensity of the Gaussian beam cannot be adjusted linearly, and the circular shrinkage diaphragm cannot be completely closed, so there is a minimum diaphragm aperture, the present invention provides a non-minimum diaphragm aperture problem and can High-precision electronically controlled diaphragm device for linear adjustment of light intensity

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