SN0303b 12.5" f/4.4 (1.5" Pyrex)
OBSIDIAN OPTICS MIRROR TEST SHEET - 7/6/04
Comments: SN0303b Jackson 12.5" f/4.4
Optical diameter: 12.45 Substrate: Pyrex 7740
Radius of curvature: 109.19 Thickness: 1.55
f/D: 4.39 Diffraction disc: 0.000115557
ZONE 1 2 3 4 5
h(x) 2.5000 3.7700 4.7200 5.5400 6.2300
h(m) 1.2500 3.1350 4.2450 5.1300 5.8850
hm**2/R 0.0143 0.0900 0.1650 0.2410 0.3172
hm/4f 0.0057 0.0144 0.0194 0.0235 0.0269
Diam1 0.0910 0.1625 0.2395 0.3145 0.3900
Diam2 0.1185 0.1865 0.2670 0.3405 0.4170
Diam12 0.1047 0.1745 0.2532 0.3275 0.4035
D12 - 0.0866 0.0181 0.0879 0.1666 0.2409 0.3169
Lambda c 0.0038 -0.0021 0.0016 -0.0002 -0.0003
Lambda f * 1e5 2.18 -3.08 3.08 -0.36 -0.85
Lambda f / rho 0.189 -0.266 0.266 -0.031 -0.074
u * 1E6 -0.40 0.56 -0.56 0.07 0.16
Wavefront -0.89 -0.04 -0.44 -0.24 0.00
Mirror wavefront error < 1/16th wave PV across both diameters
Polish, diffraction edge, figure of revolution, and smoothness all excellent.
Arithmetic wavefront error = 1 / 24.2 wave at zone 1 (average both diameters)
Results for individual diameters: Calculated Strehl Diam1 = 0.998, Diam2 = 0.998
Reading Diam1-1: 1 / 18.7 lambda, Max Trans Aberration=0.24
Reading Diam1-2: 1 / 27.6 lambda, Max Trans Aberration=0.28
Reading Diam2-1: 1 / 16.9 lambda, Max Trans Aberration=0.43
Reading Diam2-2: 1 / 21.8 lambda, Max Trans Aberration=0.36
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