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

ACHROMATIC WAVEPLATES

 

When any form of polarized light is incident on a birefringent waveplate, it is resolved into two linearly polarized components which vibrate perpendicular to each other and travel with different velocities in the crystal. The beams emerge with a phase delay. This phase delay or retardation is dependent on birefringence of the crystal. Birefringence at a specified wavelength is the difference in refractive indices of the extraordinary and ordinary resolved components. Because of dispersion of birefringence i.e. it's dependence on wavelength, there is a variation of retardation with wavelength. In an achromatic retarder, this variation is minimized by fabricating a double plate retarder using two different birefringent crystals of magnesium fluoride and crystalline quartz. Achromatic quarter and half wave retarders are optimized for three standard wavelength regions of 400 to 700 nm, 700 to 1000 nm and 1000 to 1600 nm. Standard waveplates are cemented or air-spaced type and are available in clear aperture diameters of 12 mm and 22 mm. Non standard waveplates optimized for different wavelength regions and clear apertures are available on special order.

 

quarter wave retarder with fast axis marked on the cell

half wave retarder with fast axis marked on the cell

WAVEPLATE BETWEEN TWO OPEN POLARIZERS AT 45 DEGREES AZIMUTH - % INTENSITY VS WAVELENGTH  

quarter wave achromatic optimized for 400 to 700 nm

half wave achromatic optimized for 400 to 700 nm

 

 

 

quarter wave achromatic optimized for 700 to 1000 nm

half wave achromatic optimized for 700 to 1000 nm

 

 

quarter wave achromatic optimized for 1000 to 1600 nm

half wave achromatic optimized for 1000 to 1600 nm

 

 

Specifications :

 

surface flatness : at least quarter wave @ 633 nm over the clear aperture
surface quality : 40-20 scratch dig
reflectivity per surface : uncoated about 4%; BB coating 1.5% average; HEAR coated .7% average 
     Please visit our Anti Reflection Coating page on this website for coating plots.

 

 

CEMENTED  / AIR SPACED ACHROMATIC

QUARTER AND HALF WAVE RETARDERS

Catalog Number

Clear 

Aperture

Diameter 

(mm)

Type

Retardation

in waves

WL*

Range

400-700 nm

700-1000 nm

1000-1600 nm

Type of

Anti

Reflection

Coating

Mount Dimensions

( Inches)

Outside

Diameter

+/- .002

Length

+/- .005

WPAC4-12

WL Range*-UN

12 Cemented Quarter WL Range* Uncoated .750 .500

WPAC2-12

WL Range*-HEAR

12 Cemented Half WL Range* HEAR Coated .750 .500

WPAC4-22

WL Range*-UN

22 Cemented Quarter WL Range* Uncoated 1.125 .500

WPAC2-22

WL Range*-HEAR

22 Cemented Half WL Range* HEAR Coated 1.125 .500

MWPAA4-12

WL Range*-UN

12 Air Spaced Quarter WL Range* Uncoated .750 .500

MWPAA2-12

WL Range*-HEAR

12 Air Spaced Half WL Range* HEAR Coated .750 .500

MWPAA4-22

WL Range*-UN

22 Air Spaced Quarter WL Range* Uncoated 1.125 .500

MWPAA2-22

WL Range*-HEAR

22 Air Spaced Half WL Range* HEAR Coated 1.125 .500
  Achromatic cemented waveplates are supplied unmounted. Optional mounts for these are available upon request.