Overview: A Glan-Taylor prism reflects s-polarized light at an internal air-gap, transmitting
only the p-polarized component. The optical axes are vertical in
the plane of the diagram. A Glan–Taylor prism is a type of prism which is used as a polarizer
or polarizing beam splitter. It is one of the most common types of
modern polarizing prism. The prism is made of two right-angled prisms of calcite
(350-2300nm) or a-BBO (220-3000nm) or YVO4 (500-4000nm) on their
long faces with an air gap. The optical axes of the calcite
crystals are aligned parallel to the plane of reflection. Total
internal reflection of s-polarized light at the air gap ensures
that only p-polarized light is transmitted by the device. Because
the angle of incidence at the gap can be reasonably close to
Brewster's angle, unwanted reflection of p-polarized light is
reduced, giving the Glan–Taylor prism better transmission. Note
that while the transmitted beam is completely polarized, the
reflected beam is not. The sides of the crystal can be polished to
allow the reflected beam to exit or can be blackened to absorb it.
The latter reduces unwanted Fresnel reflection of the rejected
beam. General Specifications of Glay-Taylor Polarizer: | Material | a-BBO, Calcite, YVO4 | | Wavelength Range | a-BBO: 220-3000nm; Calcite: 350-2300nm; YVO4: 500-4000nm | | Extinction Ratio | <5x10-6 | | Surface Quality | 20/10 scratch and dig | | Wavefront Distortion | <λ/4@632.8nm | | Beam Deviation | <3 arc minutes | | Damage Threshold | >1J/cm2, 20ns, 20Hz, @1064nm | | Coating | Single Layer MgF2, Tp>80%@300nm, 532nm, 1064nm Typical | | Mount | Black Anodized Aluminium |
Standard Products of Glay-Taylor Polarizer: | Part Number | Material | Wavelength (nm) | Angular Field (°) | CA (mm) | Mount (mm) | AR Coating | | GTP-B-08 | a-BBO | 700-3000 | >6.0 | 8.0 | φ25.4X17.0 | MgF2 | | GTP-B-10 | a-BBO | 700-3000 | >6.0 | 10.0 | φ25.4X19.0 | MgF2 | | GTP-B-12 | a-BBO | 700-3000 | >6.0 | 12.7 | φ25.4X21.0 | MgF2 | | GTP-B-15 | a-BBO | 700-3000 | >6.0 | 15.0 | φ30.0X23.0 | MgF2 | | GTP-B-20 | a-BBO | 700-3000 | >6.0 | 20.0 | φ38.0X29.0 | MgF2 | | GTP-Y-08 | YVO4 | 500-4000 | >6.0 | 8.0 | φ25.4X15.0 | MgF2 | | GTP-Y-10 | YVO4 | 500-4000 | >6.0 | 10.0 | φ25.4X17.0 | MgF2 | | GTP-Y-12 | YVO4 | 500-4000 | >6.0 | 12.7 | φ25.4X18.5 | MgF2 | | GTP-Y-15 | YVO4 | 500-4000 | >6.0 | 15.0 | φ30.0X20.0 | MgF2 | | GTP-Y-20 | YVO4 | 500-4000 | >6.0 | 20.0 | φ38.0X25.0 | MgF2 |
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