GLAN LASER BEAM COMBINING / SPLITTING
Glan Laser Beam Combining-Splitting polarizer is made of two calcite prisms which are assembled with an air space. It is a modification of the Glan Laser polarizer in the sense that for an input beam at normal incidence, the totally reflected ordinary polarization is made to exit the polarizer at normal incidence to the side window. Therefore, the beam separation angle between the two orthogonal output polarizations is independent of wavelength. This polarizer can also be used to combine two orthogonally polarized beams.
Specifications:
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
Surface flatness: at least quarter wave @ 633 nm over the clear aperture
surface quality: 40-20 scratch dig
Transmission (uncoated): 40-45% at 350 nm, 70-75% at 400 nm, 86-88% at 500 nm and longer wavelengths
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 LASER BEAM COMBINING / SPLITTING |
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Catalog Number |
Clear Aperture Diameter (mm) |
Mount Dimensions (Inches) |
Remarks | |
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Outside Diameter +/- .0015 |
Length +/- .007 |
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| MCSA 5 | 5 | 0.623 | 0.500 | GRADE A |
| MCSA 8 | 8 | 0.873 | 0.750 | |
| MCSA10 | 10 | 0.998 | 0.875 | |
| MCSA12 | 12 | 1.123 | 1.000 | |
| MCSS 5 | 5 | 0.623 | 0.500 | GRADE S |
| MCSS 8 | 8 | 0.873 | 0.750 | |
| MCSS10 | 10 | 0.998 | 0.875 | |
| MCSS12 | 12 | 1.123 | 1.000 | |