Glan-type polarizers use birefringent prisms to separate polarization states. Air-spaced laser variants provide escape paths for rejected light, while optical-face quality and power conditions guide the choice of assembly.
Properties, applications and specifications
Glan Laser prism polarizer is made of two same birefringent material prisms that are assembled with an air space. The polarizer is a modification of the Glan Taylor type and is designed to have less reflection loss at the prism junction. The polarizer with two escape windows allow the rejected beam to escape out of the polarizer, which makes it more desirable for high energy lasers. The surface quality of these faces is relatively poor as compared to that of entrance and exit faces. No scratch dig surface quality specifications are assigned to these faces.
Features:
Air-spaced Close to Brewster's Angle Cutting High Polarization Purity Short Length Suitable for low to medium power where the rejected beam is not required
Specifications:
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Material:
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a -BBO, Calcite or YVO4
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Wavelength Range:
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a -BBO: 200-3500 nm, Calcite: 350-2300 nm, YVO4: 400-5000 nm
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Extinction Ratio:
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Calcite:<5x10 -5 ; a -BBO:<5x10 -6 ; YVO4:<5x10 -6
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Parallelism:
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<1 arc Min
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Surface Quality:
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20-10
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Beam Deviation:
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< 3 arc minutes
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Wavefornt Distortion:
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Lambda/4@633nm
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Damage Threshold:
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>500 MW/cm 2
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Coating:
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Single MgF2
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Mount:
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Black Anodized Aluminium
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Standard Products
| Part No. | Wavelength Rang(nm) | Extinction Ratio | Angular Field(°) | C.A. (mm) | O.D (mm) | L±0.1(mm) |
| PGL6206 | According the material | <5x10 -5 | >6.0 | 6.0 | 15.0 | 12.0 |
| PGL6208 | 8.0 | 25.4 | 15.0 | |||
| PGL6210 | 10.0 | 25.4 | 20.0 | |||
| PGL6215 | 15.0 | 30.0 | 34.0 | |||
| PGL6220 | 20.0 | 38.0 | 48.9 |
