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ganoderma lucidum ANTI CANCER HERBS reishi

alpha-BBO

High temperature phase of BaB 2 O 4 is an excellent birefringent crystal; it is characterized by large birefringent coefficient and wide transmission window from 189nm to 3500nm, particularly it is suitable to make the high power UV polarizer, due to its unique UV transparency and good mechanical properties. 

The physical, chemical, thermal and optical properties of a -BBO crystals are similar to those of b -BBO, for instant high optical homogeneity(better than 1x10-6/cm), extremely low absorption in the UV to IR range (<0.5% from 300-2300nm), low hygroscopic susceptibility, high damage threshold. However, the nonlinear optical properties of a -BBO is vanished due to the centric symmetry with its crystal structure
 

 

Specifications:

Diameter: Max 50m
Length: Max 35mm
Surface Quality: better than 20/10 scratch/dig
Beam Deviation: < 3 arc min
Optical Axis Orientation: +/-0.2deg
Flatness: < l/4 @632.8nm
Wavefront Distortion: < l/2 @632.8nm
Coating: Coating upon Request


Properties:
Transmitting range 189nm~3500nm
Density 3.85g/cm3
Therm-Optic Coefficients dno/dT=-9.3 x 10-6/ °C
dno/dT=-16.6x10-6/ °C
Optical Homogeneity Dn»10-6/cm
Damage Threshold 1GW/cm2 at 1064nm
500MW/cm2 at 532nm
Hygroscopic Susceptibility Low
Thermal Expansion Coefficients aa=4x10-6
(25 °C - 900 °C) aa=4x10-6
Linear Absorption Coefficients a<0.005cm-1 from 300nm to 2300nm
Refractive Indices,
Birefringence(Dn=ne-no)
and wal-off Angle at 45 °C(r)
ne=1.5379,no=1.65790,Dn=-0.073282;r=-4.9532° at 1064nm
ne=1.5534,no=1.67755,Dn=-0.075491;r=-5.0407° at 532nm
ne=1.6114,no=1.76171,Dn=-0.089805;r=-5.6926° at 266nm
Sellmeier equation(l in mm) no2=2.7471+0.01878/(l2-0.01822)-0.01354l2
ne2=2.3753+0.01224/(l2-0.01667)-0.01516l2