Glan Thompson Polarizer - Large Acceptance Angle

Glan Thompson Polarizer

Substrate Materials: Alpha-BBO, Calcite
A large acceptance angle is a characteristic feature of Glan Thompson polarizers.
Stocked and custom polarizers available.
Broadband polarizers for UV, visible or near IR wavelengths
High Polarization Purity，Extinction ratio >100,000:1
Low Power Application.
Mount options: Rectangular or Round.

Inquire for custom product

General Product

Description

Specification

Technical Imaging

FAQS

Part NO.

Material

L/CA

Wavelength Range

Extinction Ratio

Angular Field

Clear Aperture

Mounted

Delivery

Price

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Part NO.	Material	L/CA	Wavelength Range	Extinction Ratio	Angular Field	Clear Aperture	Mounted	Delivery	Price	Add to CART
Calcite Glan Thompson Polarizer T01	Natural Calcite	2.5	350-2300 nm	<5x10-5	14°-16°	6 mm	Φ15x23 mm	2 Weeks	$230
Calcite Glan Thompson Polarizer T02	Natural Calcite	2.5	350-2300 nm	<5x10-5	14°-16°	8 mm	Φ25.4x28 mm	2 Weeks	$250
Calcite Glan Thompson Polarizer T03	Natural Calcite	2.5	350-2300 nm	<5x10-5	14°-16°	10 mm	Φ25.4x33 mm	2 Weeks	$280
Calcite Glan Thompson Polarizer T04	Natural Calcite	2.5	350-2300 nm	<5x10-5	14°-16°	15 mm	Φ30x45.5 mm	2 Weeks	$350
Calcite Glan Thompson Polarizer T05	Natural Calcite	3	350-2300 nm	<5x10-5	25°-28°	6 mm	Φ15x26 mm	2 Weeks	$230
Calcite Glan Thompson Polarizer T06	Natural Calcite	3	350-2300 nm	<5x10-5	25°-28°	8 mm	Φ25.4x32 mm	2 Weeks	$250
Calcite Glan Thompson Polarizer T07	Natural Calcite	3	350-2300 nm	<5x10-5	25°-28°	10 mm	Φ25.4x38 mm	2 Weeks	$280
Calcite Glan Thompson Polarizer T08	Natural Calcite	3	350-2300 nm	<5x10-5	25°-28°	15 mm	Φ30x53 mm	2 Weeks	$350
α-BBO Glan Thompson Polarizer T01	Alpha-BBO	1.6	200-1100 nm	<5x10-6	＞15°	6 mm	Φ15x18 mm	3 Weeks	$230
α-BBO Glan Thompson Polarizer T02	Alpha-BBO	1.6	200-1100 nm	<5x10-6	＞15°	8 mm	Φ25.4x21 mm	3 Weeks	$250
α-BBO Glan Thompson Polarizer T03	Alpha-BBO	1.6	200-1100 nm	<5x10-6	＞15°	10 mm	Φ25.4x24.5 mm	3 Weeks	$280
α-BBO Glan Thompson Polarizer T04	Alpha-BBO	1.6	200-1100 nm	<5x10-6	＞15°	15 mm	Φ30x32.5 mm	3 Weeks	$350
α-BBO Glan Thompson Polarizer T05	Alpha-BBO	1.6	200-1100 nm	<5x10-6	＞15°	20 mm	Φ38.1x40.7 mm	3 Weeks	$400

Glan Thompson polarizer consists of two right-angled prisms that are cemented together by their long faces.Birefringence splits light entering the prism into two rays, experiencing different refractive indices; the p-polarized ordinary ray is totally internally reflected from the calcite–cement interface, leaving the s-polarized extraordinary ray to be transmitted. The prism can therefore be used as a polarizing beam splitter.A large acceptance angle is a characteristic feature of Glan Thompson polarizers.

Glan Thompson polarizer is made of two calcite prisms or Alpha-BBO prisms cemented together. Two types of Glan Thompson polarizer are available. One is the standard form and the other is the long form. Their length to aperture ratios are 2.5 : 1 and 3.0 : 1 respectively. Glan Thompsons tend to have higher extinction ratio than air spaced polarizers. In the ultra violet spectrum, their transmission is limited by absorption in birefringent materials as well as the cement layer. Alpha-BBO polarizers and Calcite polarizers can be used from about 220 to 900nm and 350 to 2300 nm respectively. It is recommended for low-to-medium power applications.

The polarizers have the widest field angle of any design. The standard form of this polarizer with 2.5:1 length to aperture ratio has a full acceptance cone angle of more than 15 ° @ 589nm, symmetric about the input axis, whilst the long form with 3:1 ratio has a field angle >26 ° .

Material	a -BBO or Calcite
Wavelength Range	a -BBO: 200-3500 nm, Calcite: 350-2300 nm
Extinction Ratio	a -BBO:<5x10 -6 , Calcite:<5x10-5
Parallelism	<1 arc min
Surface Quality	20/10
Beam Deviation	< 3 arc minutes
Wavefornt Distortion	l/4@633nm
Damage Threshold	>500 MW/cm2
Coating	Single Layer MgF2
Mount	Black Anodized Aluminum

The angular field of different materials of Glan thompson polarizer listed below for comparison. Angular Field vs Wavelength

Calcite-Glan Thompson-350-2300 -2.5.webp

a-bbo-Glan Thompson-200-900.webp

How does a glan Thompson polarizer work?

Glan Thompson polarizers consist of two cemented prisms made from and Alpha-BBO or calcite. Unpolarized light enters the polarizer, then is split at the intersection of the two crystals allowing s-polarized (e-ray) light to continue and p-polarized light (o-ray) to be reflected.

What is the characteristic of Glan Thompson polarizers ?

Compared to the similar Glan Laser polarizer, the Glan Thompson polarizer has a wider acceptance angle, but it is only suitable Low Power laser Application due to without escape windows and adhesive structures

What are the application of Glan thompson polarizer ?

This polarizer is ideal for removing interference fringes from transmission spectra recorded at Brewster's angle and for obtaining optimum sensitivity for specular reflection spectroscopy measurements.

Literature

Modified Forms for Glan–Thompson and Rochon Prisms;EO Ammann, GA Massey - JOSA, 1968 - opg.optica.org
Limits on the size of aerosols from measurements of linear polarization in Titan's atmosphere;MG Tomasko, LR Doose, LE Dafoe, C See - Icarus, 2009 - Elsevier
Method for pulsewidth measurement of ultrashort light pulses generated by phase‐locked lasers using nonlinear optics;HP Weber - Journal of applied physics, 1967 - aip.scitation.org
The observations of defects in crossed Glan-Thompson polarizers;CE Moeller, DR Grieser - Applied optics, 1969 - opg.optica.org