SN0312 12.5" f/6.7 (2.16" Pyrex)
OBSIDIAN OPTICS MIRROR TEST SHEET - 2/18/04
Comments: SN0312 Mortley 12.5" f/6.6
Optical diameter: 12.4
Radius of curvature: 166.66
f/D: 6.72
Diffraction disc: 0.00017709
ZONE 1 2 3 4 5
h(x) 2.5000 3.7700 4.7200 5.5400 6.2000
h(m) 1.2500 3.1350 4.2450 5.1300 5.8700
hm**2/R 0.0094 0.0590 0.1081 0.1579 0.2067
hm/4f 0.0038 0.0094 0.0127 0.0154 0.0176
Diam1 0.1220 0.1733 0.2213 0.2697 0.3163
Diam2 0.0934 0.1546 0.1962 0.2460 0.2918
Diam12 0.1077 0.1639 0.2087 0.2579 0.3041
D12 - 0.1000 0.0077 0.0640 0.1088 0.1579 0.2041
Lambda c -0.0016 0.0050 0.0007 -0.0000 -0.0027
Lambda f * 1e5 -0.62 4.71 0.83 -0.05 -4.71
Lambda f / rho -0.035 0.266 0.047 -0.003 -0.266
u * 1E6 0.07 -0.56 -0.10 0.01 0.56
Wavefront 0.00 -0.61 -0.60 -0.48 0.00
Reference parabola: y = -0.0135071 * x**2 + 0.269873
passing through ( 2.50, 0.00) and ( 6.20, 0.00)
Mirror wavefront error <= 1/20th wave across both diameters
Polish, diffraction edge excellent; figure of revolution, smoothness very fine.
Arithmetic wavefront error = 1 / 35.4 wave at zone 2 (averaged both diameters)
Results for individual diameters:
Diameter1: 1 / 47.2 lambda, Max Trans Aberration=0.17
Diameter2: 1 / 23.5 lambda, Max Trans Aberration=0.37
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