IR resonant filters for the wavelength region 30-200 microns

Details IR resonant filters for the wavelength region 30-200 microns IR resonant filters for the wavelength region 30-200 microns

Jul 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986infph..26..215j&link_type=abstract

Infrared Physics (ISSN 0020-0891), vol. 26, July 1986, p. 215-219. DFVLR-BMFT-supported research.

Astronomy and Astrophysics

Astronomy

2

Infrared Astronomy, Optical Filters, Spaceborne Telescopes, Bandpass Filters, Broadband, Optical Resonance, Photometers, Polyimides

Scientific paper

Using UV lithography, cross-shaped mesh structures on polyimide substrates with high peak transmissions are proposed as resonant broadband filters for use in the middle and far-infrared and with application to the photometer aboard the Infrared Space Observatory. Defect free areas of about 2 x 2 sq cm were obtained, and the refractive index of the 2-micron polyimide foil is n of about 1.7. Experimental results demonstrate that filters with central wavelengths of about 50 microns can be produced, and discrepancies with predictions of the transmission-line model are discussed.

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