Near-Infrared (IR) Polarizing Glass

David N. Gritz

doi:10.1117/12.939853

20 September 1987 Near-Infrared (IR) Polarizing Glass

David N. Gritz

Proceedings Volume 0750, Infrared Systems and Components; (1987) https://doi.org/10.1117/12.939853
Event: OE LASE'87 and EO Imaging Symposium, 1987, Los Angeles, CA, United States

Abstract

High efficiency glass polarizers have been developed that offer superior design characteristics over plastic, wire-grid and some prism type polarizers. Glass polarizers have transmittance greater than 90%, contrast greater than 500:1 at acceptance angles up to 60 degrees, and excellent resistance to humidity and temperature. High polarizing efficiency is obtained over a bandwidth of about 300nm. The location of the polarized band can be specified within the near-infrared range (800-1800nm). The polarizing effect is due to the resonant absorption of elongated sub-microscopic particles of silver metal aligned along a common axis in the glass. The polarizing mechanism is discussed briefly followed by a review of typical glass polarizer performance, design characteristics and suggested applications.

Citation Download Citation

David N. Gritz "Near-Infrared (IR) Polarizing Glass", Proc. SPIE 0750, Infrared Systems and Components, (20 September 1987); https://doi.org/10.1117/12.939853

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