SN0402 12.5" f/6 (0.7" plate)
Obsidian Optics Bench Test
Comments: SN0402 12.5" f/5.9		Date: 8/1/04
   Optical diameter: 12.36"		Substrate: FA Plate
Radius of curvature: 148"		Thickness:  0.70" 
                f/D:  5.99	   	Diffraction disc: 0.000157771

Mirror wavefront error < 1/16th wave PV across both diameters

Polish, diffraction edge, figure of revolution, and smoothness all excellent.

 
 

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