Rotatable Glan-Thompson Calcite Polarizers

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Overview

These Glan-Thompson Calcite Polarizers are built into a rotation mount, which easily mounts into standard 1.0 in. diameter optic mounts. At the interface between two calcite prisms, total internal reflection takes place for one polarization state while the other is transmitted. This proven Glan-Thompson design yields extinction ratios greater than 100,000:1. The polarizers are offered with broadband AR coatings for visible, NIR and into the SWIR regions.

Glan-Thompson calcite linear polarizer design
Extinction ratio >100,000:1
Housing design incorporates a manual rotation mount
Mounts in standard 1 inch optic mounts

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Compare	Model	Wavelength Range	Availability	Price	Brand
5524 Glan-Thompson Linear Polarizer, 1.0 in. Rotatable Housing, 100,000:1, 400-700 nm $1,248 In Stock	5524 Glan-Thompson Linear Polarizer, 1.0 in. Rotatable Housing, 100,000:1, 400-700 nm	400-700 nm	In Stock	$1,248	New Focus
5525 Glan-Thompson Linear Polarizer, 1.0 in. Rotatable Housing, 100,000:1, 700-1000 nm $1,248 Show	5525 Glan-Thompson Linear Polarizer, 1.0 in. Rotatable Housing, 100,000:1, 700-1000 nm	700-1000 nm	Show	$1,248	New Focus
5526 Glan-Thompson Linear Polarizer, 1.0 in. Rotatable Housing, 100,000:1, 1000-1600 nm $1,248 In Stock	5526 Glan-Thompson Linear Polarizer, 1.0 in. Rotatable Housing, 100,000:1, 1000-1600 nm	1000-1600 nm	In Stock	$1,248	New Focus

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Specifications

Diameter

25.4 mm
Polarizing Material

Optical Grade Calcite
Extinction Ratio

100,000:1

Housing

360° Rotatable Anodized Aluminum Housing with 2° Scale
Clear Aperture

5.0 mm
Transmission

>95%

Features

Glan-Thompson Polarizer Construction

Our Glan-Thompson polarizers are fabricated using two matching optical grade calcite prisms with their hypotenuses cemented to one another to form a rectangular optic. The cemented prism pair is assembled into a black anodized aluminum housing which is a rotation stage marked with a 360° scale. The rejected component of the beam is totally internally reflected and eventually absorbed by the anodized aluminum walls of the housing.

How Glan-Thompson Calcite Polarizers Work

Glan-Thompson prisms are formed using two identical calcite prisms with hypotenuses cemented to one another to form a surface that efficiently transmits one polarization state specifically. The prisms have the same optic axis orientation as one another, which is perpendicular to the plane of reflection (the shared hypotenuse). Light that is s-polarized with respect to the reflective hypotenuse experiences the higher ordinary refractive index of calcite. Because calcite has a large index difference between extraordinary and ordinary rays, the polarizer has a fairly wide range of acceptance angles that result in transmission of only highly pure s-polarized light. Thus Glan Thompson prisms have a wide usable acceptance angle and are especially well suited for use with diverging and converging beams.

Mounting the Rotatable Housing

The housing itself is a manual rotation mount with a 5-mm clear aperture and 2° graduations marking. It can be easily mounted into standard 1.0 in. mirror mounts or other rotary stages.