Crystals & Optical Components Manufacturer - biref crystals

By: Dayoptics Company  09-12-2011
Keywords: Crystals

 


Birefringent Crystals

Overview

Birefringent Crystals
 
Physical and Optical Properties
Transparency Range 400~5000nm 350~2300nm 189~3500nm
Crystal Structure Trigonal, space group R3c Trigonal, space group R 3c Trigonal, space group R3c
Crystal Class Positive uniaxial Positive uniaxial Negative Uniaxial
Crystal Cell a =b= 7.12Å, c= 6.29Å a =b= 4.621Å, c= 3.053Å a=b=12.532Å, c=12.717Å
Density 4.22 g/cm3 3.18 g/cm3 3.85g/cm3
Hygroscopic Susceptibility Low Low Low
Mohs Hardness 5 6 4.5
Thermal Expansion Coefficients a=4.43x10-6/k
a=11.37x10-6/k
a=6.23-9.25 x 10-6 /k
a=10.86-14.54 x 10-6 /k
a=4 x 10-6 /k
c=36 x 10-6 /k
Optical Homogeneity 10-6 /cm 10-6 /cm 10-6/cm
Absorption Coefficient
Refractive Index, Birefringence(Δn = ne - no) and Walk-Off Angle at 45 deg(ρ) ne = 2.2154, no = 1.9929,
Δn=0.2251,
ρ=6.042°@ 633nm
ne = 1.48520, no = 1.65578
Δn=0.17058,
ρ=6.205°@ 633nm
ne = 1.67056, no = 1.54831,
Δn=0.1222; ρ=4.345°@ 532nm
Capabileties
Diameter Max. 30~40mm Max. 150 Max. 40~50mm
Length Max. 25~35mm Max. 100 Max. 25~35mm
Surface Quality Better than 20/10 scratch/dig
Per MIL-0-13830A
Better than 20/10 scratch/dig
Per MIL-0-13830A
Better than 20/10 scratch/dig Per MIL-0-13830A
Beam Deviation <10 arc second <10 arc second <10 arc second
Optical Axis Orientation +/-0.2° +/-0.2° +/-0.2°
Flatness
Transimission Wavfront Distortion
Coating upon specification upon specification
Birefringent Crystals
 
Physical and Optical Properties
Transparency Range 420 ~ 5200 nm 0.12~8.5nm 200~2300nm
Crystal Structure Trigonal, space group R 3c Trigonal, space group R 3c Trigonal, space group R 3c
Crystal Class Positive Uniaxial Positive Uniaxial Negative Uniaxial
Crystal Cell a =b= 0.515Å, c= 13.863Å a =b= 4.621Å, c= 3.053Å  
Density 4.64 g/cm3 3.18 g/cm3 2.65 g/cm3
Hygroscopic Susceptibility Low Low Low
Mohs Hardness 5 6 7
Thermal Expansion Coefficients a=2.0 x 10-6 /k @ 25°C
c=2.2 x 10-6 /k @ 25°C
a= 10.86-14.54x10-6/k
a= 6.23-9.25x10-6/k
a=6.2x10-6/k
a=10.7x10-6/k
Optical Homogeneity ~ 5 x 10-5 /cm 10-6/cm 10-6/cm
Absorption Coefficient 0.07 at 0.2 µm;0.02 at 5.0 µm
Refractive Index, Birefringence(Δn = ne - no) and Walk-Off Angle at 45 deg(ρ) ne = 2.20263, no = 2.28629
Δn=0.08366,
ρ=2.135°@ 633nm
Ne = 1.38876, no = 1.37698
Δn=0.01178,
ρ=0.488°@ 633nm
ne = 1.55170, no = 1.54265
Δn=0.00905,
ρ=0.335°@ 633nm
Capabileties
Diameter max. 30~40 max. 50mm max. 100mm
Length max. 25~35mm max. 100mm max. 100mm
Surface Quality better than 20/10 scratch/dig Per MIL-0-13830A better than 20/10 scratch/dig Per MIL-0-13830A better than 20/10 scratch/dig Per MIL-0-13830A
Beam Deviation <10 arc second <10 arc second <10 arc second
Optical Axis Orientation +/-0.2° +/-0.2° +/-0.2°
Flatness
Transimission Wavfront Distortion
Coating upon specification upon specification upon specification

Keywords: Crystals

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