Features

• Laser Quality Natural Calcite (low scatter)
• Large Half Angle Field of View
• 0.35 - 2.3 μm Transmission Range
• Extinction Ratio of 100,000:1

Our double Glan Taylor polarizers offer an ideal solution for high-quality polarization with extinction ratios greater than 100,000:1 for laser beams in the 0.35-2.3 μm wavelength range. The triple prism, air-spaced structure of the polarizer enables the maximum polarized field over a large half angle. In addition, this polarizer features a large clear aperture that measures 9 mm x 9 mm and is only 33 mm long.

The DGL10 is compatible with our Ø1" optomechanical mounting hardware or for use the Ø1" Stackable Lens Tubes for mounting the DGL10 into our manual, motorized, high precision, or cage system rotation mounts.

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Polarization-Dependent Refraction - Glan Laser Calcite Polarizer

Our calcite polarizers are all based on high-grade, birefringent, calcite crystals. Due to the birefringent structure of calcite, a differential delay is created between two orthogonally polarized waves traveling in the crystal. As shown in the image to the right, this birefringent structure creates a polarization-dependent refraction that effectively steers the polarization planes in two angles. While the ordinary plane will travel straight through the crystal, the extraordinary plane will exit the crystal at an angle proportional to the wavelength as well as the length of the crystal.

A calcite polarizer can be designed as either a polarization splitter/combiner or as a polarizer element that removes the angled, orthogonally polarized component of a beam. Our calcite polarizers are typically built out of two prisms, as shown in the drawing to the right. Since calcite is a soft crystal that is easily damaged, almost all of our calcite polarizers are offered in metal housings. With convenient threadings and adapters, these housings can easily be mounted into our opto-mechanical products.

Calcite Polarizer Field of View (FOV)

Frame B

Frame A

Frame D

Frame C

Mounting the DGL10

The DGL10 polarizer can be mounted to a PRM1 rotation mount by using a SM1L20 lens tube:

1. Remove the SM1RR retaining ring that comes with the PRM1 rotation mount.
2. Screw the threaded end of the lens tube into the rotation mount as shown in Frame A.
3. Once the lens tube is threaded (Frame B), insert the mounted polarizer into the other end of the lens tube (see Frame C)
4. Secure the polarizer into place using the retaining ring included with the lens tube.
5. A SPW602 spanner wrench can be used to tighten the retaining ring (Frame D).

Note: The SM1P1 Ø1" to SM1 adapter can be used in place of the SM1L20 lens tube when space is not available for the extra length of the lens tube.