A Glan-Thompson prism is composed of two identical calcite prisms or α-BBO prisms combined together. The extraordinary ray is transmitted, while the ordinary ray is deflected and absorbed.

Glan-Thompson polarizers are bonded with two calcite prisms or α-BBO prisms. There are two types of Glan-Thompson polarizers: one is the standard type, and the other is the long type. Their length-to-aperture ratios are 2.5:1 and 3.0:1 respectively. The extinction ratio of Glan-Thompson prisms tends to be higher than that of air-spaced polarizers. In the ultraviolet spectrum, their transmission is limited by the absorption of the birefringent material and the adhesive layer. α-BBO polarizers and calcite polarizers can be used in the wavelength ranges of approximately 190-900 nm and 350-2300 nm respectively.

Features：

• Cemented Type
• Wide Acceptance Angle Field
• Suitable for Low-Power Applications