Wideband all-glass linear polarizer for VIS–NIR applications

Rachid Gafsi; Katherine R. Rossington; Peter A. Schrauth

doi:10.1117/12.672146

6 July 2006 Wideband all-glass linear polarizer for VIS-NIR applications

Rachid Gafsi, Katherine R. Rossington, Peter A. Schrauth

Proceedings Volume 6273, Optomechanical Technologies for Astronomy; 62732Y (2006) https://doi.org/10.1117/12.672146
Event: SPIE Astronomical Telescopes + Instrumentation, 2006, Orlando, Florida , United States

Abstract

An important phenomenon in astronomy is polarization. Polarization data has been used to trace interstellar magnetic fields in our galaxy as well as in radio galaxies via Faraday rotation. Spectrometers equipped with lasers to help remove the blurring effects of atmospheric turbulence have advanced the collection of data of the known universe and advanced theories on the physics of the early universe. In this paper, the processes and results will be presented for an absorptive polarizer covering part of the visible (VIS) to the near Infra - Red (IR) wavelengths. Linear polarizers are essential optical elements for many optical devices and systems that are used in astronomy, astronomical instruments, telecommunications, aerospace/defense, medical/biomedical etc. This patented all-glass polarizer has a polarization bandwidth of at least 400 nm and high contrast ratio and transmission over the wavelength range of (600 to 1100) nm. It is monolithic, hence free of epoxy, adhesive or optical cement. This state-of-the-art polarizer is an advance over current commercially available glass polarizers which range from (633 to 2100) nm but with a typical polarization bandwidth of only 80 nm. This new polarizer offers excellent optical properties, as well as high durability and consistency, which will provide several advantages and benefits over technologies such as birefringent crystals and polarizing dielectric thin films deposited on glass substrates. The applications for this polarizer include various optical measurement systems, instruments and devices such as polarimetry systems, spectrometers, ellipsometers, optical modulators, imaging systems, polarization dependent isolators and shutters.

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Rachid Gafsi, Katherine R. Rossington, and Peter A. Schrauth "Wideband all-glass linear polarizer for VIS-NIR applications", Proc. SPIE 6273, Optomechanical Technologies for Astronomy, 62732Y (6 July 2006); https://doi.org/10.1117/12.672146

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KEYWORDS

Polarizers

Dielectric polarization

Glasses

Linear polarizers

Astronomy

Optical components

Reflectivity

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