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Machenical Property

Property
Specification
Tolerance
Length 
0.5≦L≦3 mm
+0.1/-0.1 mm 
3＜L≦80 mm
+0.2/-0.1 mm 
Width 
1~10 mm
± 0.1
Thickness
0.5/1/2/3
± 0.05
Chamfer in S1 and S2
< 0.1 mm 
Chamfer in S3, S4, S5 and S6
< 0.2 mm 



Material
Length
Thickness
PP-MgO:CLN  
up to 80 mm
0.5/1/2/3 mm  
PP-MgO:SLN  
up to 50 mm
0.5/1/2 mm
PP-MgO:SLT  
up to 30 mm
± 0.10.5/1/2 mm 
PP:CLN 
up to 50 mm
0.5/1 mm 



Optical Property

Property
OPG (Single pass)
OPO (Cavity)
Minimum clear aperture S1 & S2
≧ 80% of the physical aperture
Surface quality of S1 and S2 (scratch / dig)
 20 / 10
 10 / 5
Surface flatness of S1 and S2
λ/4 @ 633 nm  
λ/6 @ 633 nm 
Parallelism between S1 and S2
< 5'
< 3'
Perpendicularity between S1/S2 and S3/S4
< 10'
< 5'
AR/HR coating reflectivity on S1 and S2 for polarization parallel to the z axis
Depends on wavelengths
Ex: DBAR coating for 1064 nm SHG 
R<0.5% at 1064 nm, R<1% at 532 nm
AR coating optical damage threshold
>1,000 kW/cm2
* Standard polishing grade for length <5 mm is OPG