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These multiple order waveplates are made from a piece of crystal quartz with its optic axis parallel with the plane of polarization. A quarter wave plate has a net retardation of (2k + 1) π / 2, where k is an integer, and changes polarizationfrom linear to circular or circular to linear. It will work as a half wave plate when used in double-pass as in a laser cavity.A half wave plate has a net retardation of (2k + 1) π, where k is an integer, and rotates the plane of polarization by 90°.Optionally, these waveplates are available mounted in a metal cell.
specifications
Material | Crystal Quartz |
Dimension Tolerance | +0.0, -0.2 mm |
Wavefront Distortion | <l/8 @ 632.8 nm |
Retardation | l/4, l/2 |
Retardation Tolerance | <l/500 (typical) |
Clear aperture | 90% |
Wavelength Range | 400-2100 nm |
Parallelism | <1 arc second |
Bevel | protective bevel |
Surface Quality | 20-10 scratch and dig |
Coating | R<0.2% at central wavelength |