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

GLAN THOMPSON

 

The Glan Thompson polarizer is made of two calcite prisms cemented together. Two types of Glan Thompsons are available. One is the standard form and the other is the long form. Their length to aperture ratios are 2.5 : 1 and 3.0 : 1 respectively. Glan Thompsons tend to have higher extinction ratio than air spaced polarizers. In the ultra violet spectrum, their transmission is limited by absorption in calcite as well as the cement layer. These polarizers can be used from about 350 to 2300 nm.

 

 

 

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 arc minute

surface flatness     

: at least quarter wave @ 633 nm over the clear aperture

transmission ( uncoated )  : 35-40% at 350 nm, 65-70% at 400 nm, 80-88% 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.

 

 

GLAN THOMPSON - STANDARD FORM

Catalog Number

Clear Aperture

Diameter (mm)

Mount Dimensions

( Inches)

Remarks

Outside

Diameter

+/- .0015

Length

+/- .007

MGT25B 5 5 .623 .875

 

Grade B

Extinction 5*10^-5

Beam Deviation 5 Arc Minutes

 

MGT25B 8 8 .748 1.125
MGT25B10 10 .873 1.375
MGT25B12 12 .998 1.500
MGT25B14 14 1.123 1.875
MGT25B16 16 1.373 2.125
MGT25B20 20 1.623 2.375
MGT25A 5 5 .623 .875

 

Grade A

Extinction 1*10^-5

Beam Deviation 3 Arc Minutes

 

MGT25A 8 8 .748 1.125
MGT25A10 10 .873 1.375
MGT25A12 12 .998 1.500
MGT25A14 14 1.123 1.875
MGT25A16 16 1.373 2.125
MGT25A20 20 1.623 2.375
MGT25S 5 5 .623 .875

 

Grade S

Extinction 5*10^-6

Beam Deviation 3 Arc Minutes

 

MGT25S 8 8 .748 1.125
MGT25S10 10 .873 1.375
MGT25S12 12 .998 1.500
MGT25S14 14 1.123 1.875
MGT25S16 16 1.373 2.125
MGT25S20 20 1.623 2.375
MGT25E 5 5 .623 .875

 

Grade S

Extinction 1*10^-6

Beam Deviation 1 Arc Minutes

 

MGT25E 8 8 .748 1.125
MGT25E10 10 .873 1.375
MGT25E12 12 .998 1.500
MGT25E14 14 1.123 1.875
MGT25E16 16 1.373 2.125
MGT25E20 20 1.623 2.375
 

GLAN THOMPSON - LONG FORM

Catalog Number

Clear Aperture

Diameter (mm)

Mount Dimensions

( Inches)

Remarks

Outside

Diameter

+/- .0015

Length

+/- .007

MGT3B 5 5 .623 .875

 

Grade B

Extinction 5*10^-5

Beam Deviation 5 Arc Minutes

 

MGT3B 8 8 .748 1.250
MGT3B10 10 .873 1.625
MGT3B12 12 .998 1.875
MGT3B14 14 1.123 2.000
MGT3B16 16 1.373 2.250
MGT3B20 20 1.623 2.875
MGT3A 5 5 .623 .875

 

Grade A

Extinction 1*10^-5

Beam Deviation 3 Arc Minutes

 

MGT3A 8 8 .748 1.250
MGT3A10 10 .873 1.625
MGT3A12 12 .998 1.875
MGT3A14 14 1.123 2.000
MGT3A16 16 1.373 2.250
MGT3A20 20 1.623 2.875
MGT3S 5 5 .623 .875

 

Grade S

Extinction 5*10^-6

Beam Deviation 3 Arc Minutes

 

MGT3S 8 8 .748 1.250
MGT3S10 10 .873 1.625
MGT3S12 12 .998 1.875
MGT3S14 14 1.123 2.000
MGT3S16 16 1.373 2.250
MGT3S20 20 1.623 2.875
MGT3E 5 5 .623 .875

 

Grade S

Extinction 1*10^-6

Beam Deviation 1 Arc Minutes

 

MGT3E 8 8 .748 1.250
MGT3E10 10 .873 1.625
MGT3E12 12 .998 1.875
MGT3E14 14 1.123 2.000
MGT3E16 16 1.373 2.250
MGT3E20 20 1.623 2.875