SN0327 12.5" f/4.75 (3/4" plate)
        		OBSIDIAN OPTICS MIRROR TEST SHEET - 1/20/04

	  Comments: SN0327 Beckett 12.5" f/4.75 
   Optical diameter: 12.36
Radius of curvature: 119
                f/D:  4.81
   Diffraction disc: 0.000126856


	ZONE                1          2          3          4          5      
	h(x)              2.5000     3.7700     4.7200     5.5400     6.1800
	h(m)              1.2500     3.1350     4.2450     5.1300     5.8600
	hm**2/R           0.0131     0.0826     0.1514     0.2212     0.2886
	hm/4f             0.0053     0.0132     0.0178     0.0216     0.0246
	Diam1             0.1100     0.1780     0.2450     0.3090     0.3850
	Diam2             0.1200     0.1780     0.2500     0.3180     0.3930
	Diam12            0.1150     0.1780     0.2475     0.3135     0.3890
	D12 -  0.0967     0.0183     0.0813     0.1508     0.2168     0.2923
	Lamda c           0.0052    -0.0012    -0.0006    -0.0043     0.0038
	Lamda f * 1e5       2.74      -1.65      -1.05      -9.29       9.29
	Lamda f / rho      0.216     -0.130     -0.083     -0.732      0.732
	u * 1E6            -0.46       0.28       0.18       1.56      -1.56
	Wavefront          -1.28      -1.10      -1.10       0.00      -1.16
	Reference parabola: y = 0.0211396 * x**2 + 0
	passing through (  0.00,  0.00) and (  5.54,  0.00)

Maximum wavefront error = 1 / 16.8 wave at zone 1 (average of measured diams)

Mirror wavefront error <= 1/12.5 wave across both diameters

Polish, diffraction edge, figure of revolution excellent, smoothness very good

Results for individual diameters:
	Reading Diam1: 1 / 13.7 lamda, Max Trans Aberration=0.78
	Reading Diam2: 1 / 12.4 lamda, Max Trans Aberration=0.69

 
 

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