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Crystals for polarizing and non-linear optical applications.
more: LiNbO3, MgF2, Quarz | Birefringent Crystals | YVO4 | Calcite | a -BBO |
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| | | | | | Physical and Optical Properties | | Transparency Range | 400~5000nm | 350~2300nm | 189~3500nm | | Crystal Structure | trigonal, space group R3c | trigonal, space group R3c | 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 | aa=4.43x10-6/k
ac=11.37x10-6/k | aa=6.23-9.25 x 10-6 /k
ac=10.86-14.54 x 10-6 /k | aa=4 x 10-6 /k
cc=36 x 10-6 /k | | Optical Homogeneity | 10-6 /cm | 10-6 /cm | 10-6/cm | | Absorption Coefficient | 0.05%/cm-1 @ 1064nm | 0.07 @ 0.2m, 0.02 @ 5.0m | 0.05%/cm-1 @ 1064nm | | 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 | | Capabilities | | 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 | <λ/8 @ 633nm | <λ/8 @ 633nm | <λ/8 @ 633nm | | Transimission Wavfront Distortion | <λ/4 @ 633nm | <λ/4 @ 633nm | <λ/4 @ 633nm | | Coating | upon specification | upon specification | upon specification |
| Birefringent Crystals | LiNbO3 | MgF2 | Quartz |
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| | | | | | 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 | Negative Uniaxial | Positive Uniaxial | Positive Uniaxial | | Crystal Cell | a=b=0.515Å, c= 13.863Å | a= 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 | aa=2.0 x 10-6 /k @ 25°C
cc=2.2 x 10-6 /k @ 25°C | ac= 10.86-14.54x10-6/k
aa= 6.23-9.25x10-6/k | aa=6.2x10-6/k
ac=10.7x10-6/k | | Optical Homogeneity | ~ 5 x 10-5 /cm | 10-6/cm | 10-6/cm | | Absorption Coefficient | 0.1%/cm @ 1064 nm | 0.07 at 0.2 µm; 0.02 at 5.0 µm | 0.1%/cm @ 1064 nm | | 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 | | Capabilities | | 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 | <λ/8 @ 633nm | <λ/8 @ 633nm | <λ/8 @ 633nm | | Transimission Wavfront Distortion | <λ/4 @ 633nm | <λ/4 @ 633nm | <λ/4 @ 633nm | | Coating | upon specification | upon specification | upon specification |
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