| Substrate Material: | BK7 Optical Glass | 
| Outer Dimension: | 18.3x16.0,+/-0.1mm (0.72x0.63 inches) | 
| Thickness: | 2.0, -0.2/0mm (0.079 inches) | 
| Surface Quality: | 20/10 S/D per MIL Standard | 
| Flatness: | Lambda/10 at 633nm over 25mm area on-jig tested | 
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| Coating Wavelength: | 400-700nm,non-polarizing coating | 
| Angle of Incedence: | 45-deg | 
| Splitting Ratio: | R70 : T30 @ 400-700nm | 
| Splitting Ratio Tolerance: | <10% over entire wavelength range |Ts-Tp|<10% and |Rs-Rp|<10%
 | 
| Front Surface Reflection at 45-deg AOI:
 | R70% at 400-700nm, 45-deg AOI | 
| Front Surface Transmission at 45-deg AOI:
 |  T30% at 400-700nm, 45-deg AOI | 
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| Back Surface AR Coating: | Ravg<0.5% at 400-700nm,45-deg AOI | 
| Temperature Range: | -50 to +80 deg C |