Glan-Thomson Prism

Glan-Thomson Prism

Supplier
Lambdaoptics
Category
Prisms
Origin
China

Glan Thompson polarizer is made of two calcite prisms or a-BBO prisms cemented together. Two types of Glan Thompsons 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 birefriengent materials as well as the cement layer. a-BBO polarizers and Calcite polarizers can be used from about 220 to 900nm and 350 to 2300 nm respectively. 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° . The polarized field F1 and F2 of all these is shown in the plot below.

Specification Snapshot
Material
a-BBO, Calcite
Wavelength Range
a-BBO: 200-1100 nm, Calcite: 350-2300 nm
Surface Quality
20-10
Beam Deviation
< 3 arc minutes
Wavefornt Distortion [633nm]
λ /4@633nm
Damage Threshold
>200 MW/cm²
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Overview

Glan Thompson polarizer is made of two calcite prisms or a-BBO prisms cemented together. Two types of Glan Thompsons 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 birefriengent materials as well as the cement layer. a-BBO polarizers and Calcite polarizers can be used from about 220 to 900nm and 350 to 2300 nm respectively. 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° . The polarized field F1 and F2 of all these is shown in the plot below.

Specifications

ParameterValue
Materiala-BBO, Calcite
Wavelength Rangea-BBO: 200-1100 nm, Calcite: 350-2300 nm
Extinction RatioCalcite:<5x10⁻⁵ ; a-BBO:<5x10⁻⁶
Parallelism<1 arc Min
Surface Quality20-10
Beam Deviation< 3 arc minutes
Wavefornt Distortion [633nm]λ /4@633nm
Damage Threshold>200 MW/cm²
CoatingSingle MgF₂
MountBlack Anodized Aluminium

Datasheet

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Supplier Information

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Lambdaoptics
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Fuzhou Lambda Optics Co., Ltd. is located in Fuzhou, Fujian Province, the central city of the West Strait Economic Zone. It is a cold-processing optical enterprise specializing in the research, development, processing and sales of optical crystals and high-precision optical components. The company has a modern standard factory building of 1,200 square meters, over 60 employees, and is equipped with high-precision production and testing equipment such as single-axis machines, two-axis machines, inner circle cutting machines, coating machines, laser plane interferometers, and ultra-clean benches. The company has passed ISO9001:2015 system certification. Products are widely used in laser systems, optical communication equipment, medical equipment, optical instruments, etc. Main products include optical components (prisms, mirrors, optical windows, waveplates, beam splitters, filters, etc.) and optical thin films (anti-reflection coatings, beam splitter coatings, metallic reflective coatings, dielectric high-reflection coatings, etc.). The company adheres to the philosophy of 'quality first, continuous improvement, customer satisfaction, industry pioneer', and its product quality and service have been well received by domestic and foreign customers. On the premise of sustainable development, based on quality, the company is dedicated to providing customers with cost-effective products and first-class service, and is willing to conduct in-depth exchanges and cooperation with domestic and foreign production and scientific research institutions pursuing high quality.

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