Large-area extended radiation calibration light source uniformity test device

Abstract

The large-area extended radiation calibration light source uniformity test device belongs to the field of space optics, and the device includes: a test unit, a mounting frame, a vertical guide rail, a horizontal guide rail, a fixed frame, a controller and a main control computer; the plurality of test units are installed in On the installation frame, the installation frame is fixed on the vertical guide rail, the vertical guide rail is installed on the horizontal guide rail, and the horizontal guide rail is installed on the fixed frame; the main control computer realizes the movement of the vertical guide rail and the horizontal guide rail through the control controller, and the test unit collects the light source, Conversion and transmission; the test unit adopts a special structure to realize the collection of all radiation signals within the solid angle of π space in front of the light entrance. According to the test results, the invention optimizes the combination of the built-in light source of the large-area extended radiation calibration light source, so that the radiation emitted by the combination has better uniformity, and establishes a corresponding database. The radiation calibration source area is large, reaching Φ3.2m; the test time is short, less than 5min.

Description

technical field [0001] The invention belongs to the field of space optics, and in particular relates to a large-area extended radiation calibration light source uniformity test device. Background technique [0002] Radiation calibration is one of the important links in the development of space optical camera. With the development of science and technology, the field of view and light entrance aperture of space cameras are getting larger and larger, and the light entrance aperture currently reaches the order of Φ3.2m. In order to meet the radiation calibration requirements of space cameras, radiation calibration equipment is required to provide a large-area extended radiation calibration light source that is uniform in the order of Φ3.2m. Uniformity is one of the important indicators of radiation calibration light sources. The uniformity of the radiation surface It has a significant impact on both absolute and relative radiometric calibration of space cameras. For small-are...

AI Technical Summary

Problems solved by technology

However, for a large-area extended radiation calibration light source that is uniform to the order of Φ3.2m, a single radiometer is used to do two-dimensional scanning, and the time used for one scan reaches 2h. The instability of the light source will be introduced into the test results, which is relatively large measurement error

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