Angle tolerance:

dθ< ± 0.5°; dφ< ±0.5°

Dimensional Tolerance:

(W ± 0.1mm) x (H ± 0.1mm) x (L + 0.2/-0.1mm)

Flatness:

<L/8 at 633nm                

Surface Quality(S/D):

10/5 before coating,  20/10 after coated

Parallelism:

< 20 arc seconds

Perpendicularity:

< 5 arc minutes

Wavefront Distortion:

<L/8 at 632.8nm                

Clear Aperture:

Central 95%

Bevel (leg width):

<0.15mm x 45degree                

Coating:

* Protective coating is required to prevent polished surfaces from fogging.

* Anti-reflective coating should be considered if low reflectivity is required.

Mount:

Black Anodized Aluminium

Crystal Symmetry

Zircon tetragonal, space group D_4h

Crystal Cell

a=b=7.12 °, c=6.29 °

Density

4.22 g/cm2

Hygroscopic Susceptibility

Non-hygroscopic

Mohs Hardness

5 glass like

Thermal Optical Coefficient

△na /dT=8.5x10-6 /K; dnc /dT=3.0x10-6 /K

Thermal Conductivity Coefficient

||C: 5.23 w/m/k; ⊥C:5.10w/m/k

Crystal Class

Positive uniaxial with no=na=nb, ne=nc

Refractive Indices,

no=1.9929, ne=2.2154, △n=0.2225, ρ=6.04°, at 630nm

Birefringence( Dn=ne-no)

no=1.9500, ne=2.1554, △n=0.2054, ρ=5.72°, at 1300nm

and Walk-Off Angle at 45 deg(ρ)

no=1.9447, ne=2.1486, △n=0.2039, ρ=5.69°, at 1550nm

Sellmeier Equation ( l in mm)

no² =3.77834+0.069736/(λ² -0.04724)-0.0108133λ²
ne² =4.5905+0.110534/(λ² -0.04813)-0.0122676λ²