Infrared/millimeter wave common-aperture optics

Details Infrared/millimeter wave common-aperture optics Infrared/millimeter wave common-aperture optics

Jan 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989opten..28...14b&link_type=abstract

Optical Engineering (ISSN 0091-3286), vol. 28, Jan. 1989, p. 14-19. Research supported by Honeywell, Inc.

Physics

Optics

Cassegrain Optics, Infrared Imagery, Millimeter Waves, Apertures, Automatic Control, Dichroism, Infrared Scanners, Radar Range, Weapons Delivery

Scientific paper

A catadioptric Cassegrain optical system is described that permits simultaneous operation as an infrared (IR) imager and a millimeter wave (MMW) radar through a common aperture. Separation of IR and MMW focal points is achieved by use of suitable dichroic coatings and substrate materials. The design is evaluated by building a prototype and measuring its performance in the laboratory, with particular attention given to isolating the degradation suffered by each mode due to the presence of the other. Although the design is feasible, improvements are needed both in the design of the secondary element and in the technology for conductive dichroic coatings.

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