Specular Black Vane Cavities

Robert P . Breault

doi:10.1117/12.934948

4 October 1983 Specular Black Vane Cavities

Robert P . Breault

Proceedings Volume 0384, Generation, Measurement and Control of Stray Radiation III; (1983) https://doi.org/10.1117/12.934948
Event: 1983 Los Angeles Technical Symposium, 1983, Los Angeles, United States

Abstract

During the design of a stray light suppression system that requires a great amount of stray light attenuation, someone inevitably will ask or consider a specular black coating on the sections where the system is most sensitive. Although the initial attraction is obviously due to the very low large angle scatter, about 100 times lower than a typical diffuse black scatterer, the choice is seldom helpful. The first argument against specular black cavities is the propagating specular beam. Usually this is so obvious a consideration that the designer immediately folds it into consideration. What is seldom considered is the several ways that the near specular paths, which are almost always present, can contribute significantly higher levels of scattered light than diffusely coated surfaces. This paper highlights some of the second level considerations that should be made when specular coatings are to be used.

Citation Download Citation

Robert P . Breault "Specular Black Vane Cavities", Proc. SPIE 0384, Generation, Measurement and Control of Stray Radiation III, (4 October 1983); https://doi.org/10.1117/12.934948

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