Karl Lambrecht Corporation

4204 N. Lincoln Ave., Chicago, IL 60618.

Phone : 773-472-5442 / Fax : 773-472-2724

email : sales@klccgo.com / website : www.klccgo.com

crystal polarizers

retardation devices

scramblers

thin film polarizers

anti-reflection coatings

rotary stages

 

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CALCITE POLARIZERS
Glan Taylor
Glan Laser

Glan Thompson

UV Glan Thompson
Brewster Angle
Glan Thompson Beam Splitting
Glan Laser Combining Splitting
Glass Calcite Rochon
Wollaston
Beam Displacer
IR Plate
MAGNESIUM FLUORIDE POLARIZERS
Rochon
CRYSTAL QUARTZ POLARIZERS
Rochon
Wollaston
RETARDATION DEVICES
Crystal Quartz
Magnesium Fluoride
Achromatic
Mica
Fresnel Rhomb
Babinet Soleil Compensator
Fixed Rotator
SCRAMBLER
Calcite Scrambler
Quartz Scrambler
Magnesium Fluoride Scrambler
THIN FILMS
Narrow Band Polarizing Cube
Broad Band Polarizing Cube
Thin Film Optical Isolator
Thin Film Beam Displacer
Anti Reflection Coating
MOUNTING DEVICES
Rotary Stage
GLASS COMPONENTS
Coupling Prism

IR CALCITE PLATE POLARIZER

 

Calcite crystal exhibits absorption of input radiation at 3.390 and 3.507 micrometers depending upon polarization of incident beam. This *dichroic  property of calcite is used to make a 25.4 mm diameter, 1 mm thick plate polarizer for above given wavelengths. It is available without anti-reflection coating. It's part number is CPIR-25.4-Un.

* Reference : September 1965 / Vol. 4, No. 9 / Applied Optics / Page 1121

 

Specifications :

 

A grade calcite  : quarter to one 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 )  : about 75% at 3.390 and 3.507 microns ( supplied uncoated )

 

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.