GLAN TAYLOR
The Glan Taylor prism polarizer is made of two calcite prisms which are assembled with an air space. It has a length to aperture ratio of approximately 1.0, which makes it a relatively thin polarizer. It is made of UV-selected calcite. A 10 mm thick calcite plate having 50% or more transmission at 250 nm is considered UV-selected. The spectral range of this polarizer is from 250-2300 nm. Below 250 nm, transmission cutoff wavelength varies from crystal to crystal.
Specifications:
B grade calcite: greater than one wave wavefront deformation @ 633 nm due to striae only
A grade calcite: quarter to one wave wavefront deformation @ 633 nm due to striae only
S grade calcite: quarter-wave wavefront deformation @ 633 nm due to striae only
E type: made of S grade calcite, but polarizer has beam deviation of one instead of three arc minutes
Surface flatness: at least quarter-wave @ 633 nm over the clear aperture
Surface quality: 40-20 scratch dig
Transmission (uncoated): 25-30% at 250 nm, 40-45% at 300 nm, 65-70% at 400 nm and 85-87% at > 500 nm
please visit Anti Reflection Coating page for reflectivity plots of available coatings
Calcite is a natural mined crystal. Defects in bulk calcite are characterized by bubbles (presence of randomly scattered bubbles vary from relatively large to small sizes and fine bubble lines), striae (streaks of sudden variation of refractive index which can be detected interferometrically), optical inhomogeneity (gradual variation of refractive index in bulk material) and stress birefringence (variation of birefringence in bulk material due to defective growth of the crystal). These defects cause degradation of polarization and transmission loss due to scattering and absorption.
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GLAN TAYLOR |
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Catalog Number |
Clear Aperture Diameter (mm) |
Mount Dimensions (Inches) |
Remarks | |
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Outside Diameter +/- .002 |
Length +/- .007 |
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| MGTYB 8 | 8 | .748 | .625 |
Grade B Extinction 1*10^-4 Beam Deviation 5 Arc Minutes |
| MGTYB10 | 10 | .748 | .625 | |
| MGTYB12 | 12 | .873 | .750 | |
| MGTYB15 | 15 | 1.123 | .875 | |
| MGTYB20 | 20 | 1.373 | 1.125 | |
| MGTYA 8 | 8 | .748 | .625 |
Grade A Extinction 5*10^-5 Beam Deviation 3 Arc Minutes |
| MGTYA10 | 10 | .748 | .625 | |
| MGTYA12 | 12 | .873 | .750 | |
| MGTYA15 | 15 | 1.123 | .875 | |
| MGTYA20 | 20 | 1.373 | 1.125 | |
| MGTYS 8 | 8 | .748 | .625 |
Grade S Extinction 1*10^-5 Beam Deviation 3 Arc Minutes |
| MGTYS10 | 10 | .748 | .625 | |
| MGTYS12 | 12 | .873 | .750 | |
| MGTYS15 | 15 | 1.123 | .875 | |
| MGTYS20 | 20 | 1.373 | 1.125 | |
| MGTYE 8 | 8 | .748 | .625 |
Grade S Extinction 5*10^-6 Beam Deviation 1 Arc Minutes |
| MGTYE10 | 10 | .748 | .625 | |
| MGTYE12 | 12 | .873 | .750 | |
| MGTYE15 | 15 | 1.123 | .875 | |
| MGTYE20 | 20 | 1.373 | 1.125 | |