Rain Erosion Mechanisms For Optical Materials

William F. Adler

doi:10.1117/12.955756

20 January 1978 Rain Erosion Mechanisms For Optical Materials

William F. Adler

Proceedings Volume 0121, Optics in Adverse Environments I; (1978) https://doi.org/10.1117/12.955756
Event: 21st Annual Technical Symposium, 1977, San Diego, United States

Abstract

Identification of erosion mechanisms in optical materials and the controlling material properties are almost non-existent. This review attempts to provide a general view of many aspects of the characterization of optical materials exposed to a rain environment at high subsonic to supersonic velocities based on rather fragmented and still incomplete evaluations. A small number of materials, representative of a broad range of material behavior and type, is examined in some depth to demonstrate the uniqueness of the damage produced by multiple water drop impacts in relation to more conventional material evaluation procedures. The ultimate objective of an erosion mechanism investigation for optical materials is to find ways to extend the incubation period for erosion damage in order to reduce optical degradation through the growth of internal fracture networks and/or erosion pits. Acceptable levels of performance may be achieved for a specific material or class of materials by a basic and carefully planned materials-oriented program and through a cooperative effort between materials development and rain erosion assessment programs.

Citation Download Citation

William F. Adler "Rain Erosion Mechanisms For Optical Materials", Proc. SPIE 0121, Optics in Adverse Environments I, (20 January 1978); https://doi.org/10.1117/12.955756

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