Model of optical scatter from microimpacts on the Hubble Telescope

Details Model of optical scatter from microimpacts on the Hubble Telescope Model of optical scatter from microimpacts on the Hubble Telescope

Mar 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993lpi....24..353c&link_type=abstract

In Lunar and Planetary Inst., Twenty-fourth Lunar and Planetary Science Conference. Part 1: A-F p 353-354 (SEE N94-12015 01-91)

Computer Science

Hubble Space Telescope, Image Resolution, Life (Durability), Meteorite Craters, Micrometeoroids, Mie Scattering, Mirrors, Space Debris, Telescopes, Algorithms, Contamination, Hypervelocity Impact, Impact Damage, Long Duration Exposure Facility, Size Distribution

Scientific paper

The investigation and modelling of optical scatter from damaged or contaminated mirrors is of interest to those who wish to estimate the working life cycle of an optical system. A space born telescope faces a threat to its survival from naturally occurring micrometeoroids and man-made debris. High velocity, in the range of 4 to 14 km/s, impacts of small particles, in the range of 1 to 100 microns, will produce small craters on the impacted surface. These microcraters will typically have a size range of 3 to 300 microns for debris impacts and 6 to 600 microns for micrometeoroid impacts. If the microcraters accumulate on a telescope mirror, there will be an increase in optical scatter and a loss of image resolution. The micrometeoroid model of Cour-Palais and the orbital debris model of Kessler have been encoded in a computer program (SPENV) by the author. The output from this program has been matched with previous calculations and compared with impact data on the LDEF satellite. Subsequent work has been done to marry this computer program with an algorithm to compute optical scatter. The optical scatter algorithm employs Mie theory of scatter from small particles.

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