Method for calculating optical performance of non-uniform non-metallic material outgassing pollution film

Abstract

The invention discloses a method for calculating the optical performance of a non-uniform non-metallic material outgassing pollution film. The method is characterized by comprising the following stepsof: (1) establishing a multi-layer film optical pollution effect model; (2) calculating the optical constant and thickness of each layer of film; (3) calculating the optical constants of a rough surface and a transition layer; and (4) substituting the calculated optical constant and thickness of each layer of film and the optical constants of the rough surface and the transition layer into the multi-layer film optical pollution effect model, and calculating the relationship between the transmittance and wavelength of the pollution film. By establishing the multi-layer film optical pollution effect model and fully considering the actual situations such as the transition layer between the films and the surface roughness, the transmittance value of the pollution film is obtained. The methoddisclosed by the invention can more accurately estimate the optical performance of the pollution film, thereby reducing the estimation error of the influence of satellite molecular pollutants on optical devices and providing technical guarantee for the requirements of long service life and high reliability of spacecrafts.

Description

Technical field[0001]This application relates to the technical field of space environmental pollution effect evaluation, and in particular to a method for calculating the optical performance of a non-uniform non-metallic material outgassing pollution film.Background technique[0002]Spacecraft non-metallic materials will produce gas molecules under the action of vacuum and temperature, which will be deposited on the sensitive surface after diffusion. If deposited on the surface of the solar cell, the output power of the solar cell will decrease. If deposited on the optical surface, it will affect the optics. The transmittance and reflectance of the device. If a high-resolution optical instrument mounted on a satellite is deposited with a silicone oil film of tens of nanometers thick, the reflectance of the optical surface to light with a wavelength of about 0.13 μm will drop by about 10%.[0003]Regarding the impact of pollution on optical devices, researchers have done a lot of work. T...

AI Technical Summary

Problems solved by technology

There are mainly the following problems. First of all, most of them only focus on the factors affecting the optical properties of thin films, and do not give a specific prediction model

Secondly, in order to obtain the optical constants of the film, most of them use the fitting method, or do not consider the transition layer between the two films or the actual situation of the upper surface roughness in the process of establishing the multi-layer contaminated film, resulting in the experimental value and the theoretical value. has a difference

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