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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 6, Iss. 8 — Aug. 1, 1967
  • pp: 1353–1358

Metal Mesh Interference Filters for the Far Infrared

R. D. Rawcliffe and C. M. Randall  »View Author Affiliations


Applied Optics, Vol. 6, Issue 8, pp. 1353-1358 (1967)
http://dx.doi.org/10.1364/AO.6.001353


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Abstract

Far ir Fabry-Perot type interference filters consisting of two parallel, closely spaced metal meshes have been reported by others. Using improved techniques, filters of this type have been fabricated with larger finesse and peak transmittance. Measured transmittance curves, obtained with the Aerospace lamellar grating interferometer have led to transmittance peaks whose sharpness appears to be limited principally by the beam convergence angle within the instrument (8°). From the measured peaks, finesses as large as 100 are obtained. Available mesh materials permit the construction of filters for any frequency from 10 cm−1 (or lower) to at least 200 cm−1. These will require absorbing components to eliminate unwanted harmonics.

© 1967 Optical Society of America

History
Original Manuscript: March 13, 1967
Published: August 1, 1967

Citation
R. D. Rawcliffe and C. M. Randall, "Metal Mesh Interference Filters for the Far Infrared," Appl. Opt. 6, 1353-1358 (1967)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-6-8-1353

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