| 
 Substrate:  | 
 BK7 optical glass  |  
| 
 Design Wavelength Range:  | 
 1150~1700nm (O-,S-,C-,L- bands)  |  
| 
 Wavefront Distortion:  | 
 <Lambda/10 at 633nm typ over surface  |  
| 
 Surface Quality:  | 
 20-10 scratch and dig  |  
| 
 Outer Dimension:  | 
 12.7x12.7x12.7mm  |  
| 
 Dimension Tolerance:  | 
 +/-0.1mm  |  
| 
 Extinction Ratio(ER):  | 
 Tp:Ts > 500:1  |  
| 
 Transmission Efficiency:  | 
 Tp > 96%; (Tp>99% at O-,S-,C-, L- bands)  |  
| 
 Reflection Efficiency:  | 
 Rs > 99%  |  
| 
 Reflected Beam Deviation:  | 
 90-deg +/-5 arc min   |  
| 
 Anti-Reflection Coating:  | 
 R < 0.25% over O, S, C, L bands  |  
| 
 Clear Aperture:  | 
 > 85% of outer dimension  |  
| 
 Damage Threshold:  | 
 100mJ/cm2, 8nsec pulse; 100W/cm2  |    |