| Substrate: | BK7 Optical Glass | 
| Dimension: | 30.0x18.5,-0.1/0mm (1.18x0.73 inches) | 
| Thickness: | 3.0, +/-0.1mm (0.118 inches) | 
| Surface Quality: | 20/10 S/D per MIL Standard | 
| Flatness: | Lambda/10 at 633nm over 25mm on-jig tested | 
|  |  | 
| Coating Wavelength: | 400-700nm, Non-Polarizing | 
| Angle of Incedence: | 45-deg | 
| Splitting Ratio: | R50:T50 | 
| Splitting Ratio Tolerance: | <15% over entire wavelength range |Ts-Tp|<15% and |Rs-Rp|<15%
 | 
|  |  | 
| Front Surface Transmission at 45-deg AOI:
 |  50% at 400-700nm (+/-5%)
  | 
| Front Surface Reflection at 45-deg AOI:
 | 50% at 400-700nm (+/-5%) | 
| Back Surface AR Coating: | Ravg < 0.5% at 400-700nm | 
| Temperature Range: | -50 to +80 deg | 
| Additional Chamfers: | 2.3mm x45deg along single-side of 30mm; Drawing below for reference; Unit: inch |