Off Axis Parabolic Mirrors

 Focal length: +/- 0.5% 

 Diameter: +.000" -.005" 

 Off-Axis Distance: +/-0.02" (standard configuration), +/- 0.125" (stand-alone configuration) 

 Edge Thickness: +/-0.05" (12" focal length or less), +/-0.10" (18" focal length or greater) 

 Surface Quality: 60/40 

 Surface Accuracy: Specified over 90% of the clear aperture area

                            (Test Wavelength 0.6328 microns)