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Calcite
Calcite is a nature crystal that has high birefringence, widely spectral transmission and availability in reasonably sizes rhombs. It’s a negative uniaxial crystal and mostly used as visible and near IR Polarizers.

Specifications

Dimension tolerance

±0.1mm

Angle tolerance

<0.5°

Surface flatness

l/8@632.8nm

Wavefront distortion

l/8@632.8nm

Surface quality

20-10

Parallelism

<20 arcsec

Perpendicularity

<5 arcmin

Clear aperture

>80%

b=0° b=45°  
 


Sellmeier equations
    YVO4:       no2(l)=3.77834+0.069736/(l2-0.04724)-0.0108133l2

                                       YVO4:       ne2(l)=4.59905+0.110534/(l2-0.04813)-0.0122676l2

                                     a-BBO        no2(l)=2.7471+0.01878/(l2-0.01822)-0.01354l2

                                     a-BBO        ne2(l)=2.3174+0.01224/(l2-0.01667)-0.01516l2    

                                     Calcite      no2(l)=2.69705+0.0192064/(l2-0.01820)-0.0151624l2

                                     Calcite      ne2(l)=2.18438+0.0087309/(l2-0.01018)-0.0024411l2   

Transparency

no@1550nm

ne@1550nm

n@1550nm

b@45°

YVO4

0.4-5.0mm

1.9447

2.1486

0.2039

5.69°

Calcite

0.35-2.3mm

1.6629

1.4772

-0.1564

-5.75°

a-BBO

0.19-3.5mm

1.64998

1.51199

-0.137996

-4.99°

LiNbO3

0.42-5.2mm

2.21122

2.13806

-0.073156

-1.93°

The following parameters are typically required to specify when ordering:

Sizes                           Diameter x Length (mm)

► Optical axis                  a and b

► Coating on S1&S2       reflectivity at wavelength

Item#

Size (mm)

a

b

d (mm)

YD1-07

2.6x2.6x7.0

45°

0°

0.7

YD1-10

2.6x2.6x10.0

45°

0°

1.0

YD1-12

2.6x2.6x12.0

45°

0°

1.2

YD1-15

2.6x2.5x15.0

45°

0°

1.5

YD1-20

3.0x3.0x20.0

45°

0°

2.0

YD1-30

4.0x4.0x30.0

45°

0°

3.0

YD2-07

2.6x2.6x7.0

45°

45°

0.7

YD2-10

2.6x2.6x10.0

45°

45°

1.0

YD2-12

2.6x2.6x12.0

45°

45°

1.2

YD2-15

2.6x2.5x15.0

45°

45°

1.5

YD2-20

3.0x3.0x20.0

45°

45°

2.0

YD2-30

4.0x4.0x30.0

45°

45°

3.0


 
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