Manufacturing method of diffuse flat plate reflector and diffuse flat plate reflector

Abstract

The present invention discloses a manufacturing method of a diffuse flat plate reflector and a diffuse flat plate reflector. The method comprises: performing the physical grinding technology of the surface of a substrate to form a diffuse flat plate reflector body; performing the chemical etching technology of the diffuse flat plate reflector body to form a diffuse flat plate reflector having a diffuse surface; and forming a reflection film on the diffuse surface of the diffuse flat plate reflector through the coating technology. The diffuse flat plate reflector body with a large size and high flatness is manufactured through a physical grinding mode, a diffuse surface with good diffuse reflectivity through adoption of the chemical cleaning and etching method, the made diffuse flat plate reflector is subjected to experimental test and primary application to satisfy requirements at the aspects of the surface uniformity, the spatial stability, the reflectivity, the Lambert characteristics and the like, and the reflection film is plated to improve the reflectivity index of an infrared band and improve the surface stability so as to reach the purpose of application of the diffuse flat plate reflector in a spatial infrared band optical spectrum instrument.

Description

technical field [0001] The invention relates to the field of optical radiation measurement, in particular to a manufacturing method of a diffuse reflection plate and the diffuse reflection plate. Background technique [0002] The diffuse reflection plate is an important optical component for spectral radiation calibration and spectral irradiance measurement. The quality of its diffuse reflection characteristics directly determines the calibration accuracy of the spectral radiation instrument, which in turn affects the overall performance of the instrument and the application quality of the acquired data. In recent years, infrared remote sensing technology has achieved rapid development in military target detection, atmospheric composition analysis, mineral exploration, and ecosystem research. Infrared band diffuse reflector for orbital calibration function is very necessary. [0003] At present, diffuse reflectors are widely used in the ultraviolet and visible bands of spac...

AI Technical Summary

Problems solved by technology

The diffuse reflection plate coated with magnesium fluoride protective film on the aluminum alloy substrate has successful application experience in the ultraviolet spectrometer. The reflectivity of the infrared band is not suitable for the realization of high reflectivity in the infrared band, and magnesium fluoride is toxic, and its application range is limited

In addition, the diffuse transmission plate used in the visible and near-infrared bands in the prior art mainly works between 0.7-2.0 μm. The calibration diffuse reflection plate uses the diffuse transmission method to introduce sunlight into the interior of the optical instrument. The material of the diffuse transmission plate is selected A space-grade material (spectralon) is used, and there is a contradictory relationship between the transmittance and the surface uniformity of the material in the production of the diffuse transmission plate, that is, the uniformity of the emitted light will increase when the thickness of the material is thick, but the transmittance will decrease. Decrease, while the thickness of the material is thinner, the transmittance will increase but the uniformity will decrease. Therefore, this solution is not suitable for occasions where the uniformity of the outgoing light and the transmittance / reflectivity are required to be high; in addition, the material It itself will decompose at a temperature higher than 400°C, and it is not suitable for occasions that require daily calibration for a long time. It needs to sacrifice part of the price in application, and the versatility of use is poor.

[0004] Therefore, for large-aperture infrared band spectrometers, the development of diffuse reflection plates with large size, high stability, and high diffuse reflection characteristics is relatively short.

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