Experimental measurement of the optical path difference of a four-meter dual aerocurtain

Details Experimental measurement of the optical path difference of a four-meter dual aerocurtain Experimental measurement of the optical path difference of a four-meter dual aerocurtain

May 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990spie.1221..404k&link_type=abstract

IN: Propagation of high-energy laser beams through the earth's atmosphere; Proceedings of the Meeting, Los Angeles, CA, Jan. 15-

Physics

Optics

Environment Protection, Flow Measurement, High Power Lasers, Laser Beams, Optical Measurement, Optical Paths, Windows (Apertures), Aberration, Dust, Free Electron Lasers

Scientific paper

The Gound-Based FEL Technology Integration Experiment's high power laser requires a beam director-dome window to protect the optics from dust accretion and reduce the optical aberrations occurring in the air interface between the dome interior and exterior. One half of the dual aerocurtain designed for this purpose is heated 18 C above ambient temperature, while the other is not heated; this results in the development of two mixing zones, (1) between the heated and unheated halves, and (2) between the latter and the room air. This aerocurtain configuration is shown to reduce the Strehl ratio loss through the window to several percent.

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