SN0338 15.5" f/5.2 (0.9" plate)
OBSIDIAN OPTICS MIRROR TEST SHEET - 6/3/04
Comments: SN0338 15.5" f/5.2
Optical diameter: 15.38 Radius of curvature: 161
f/D: 5.23 Diffraction disc: 0.000137928
ZONE 1 2 3 4 5 6 7
h(x) 2.6900 4.0900 5.1100 5.9700 6.7100 7.3900 7.6900
h(m) 1.3450 3.3900 4.6000 5.5400 6.3400 7.0500 7.5400
hm**2/R 0.0112 0.0714 0.1314 0.1906 0.2497 0.3087 0.3531
hm/4f 0.0042 0.0105 0.0143 0.0172 0.0197 0.0219 0.0234
Diam1 0.0620 0.1150 0.1745 0.2375 0.3000 0.3645 0.4015
Diam2 -0.0097 0.0465 0.1085 0.1695 0.2308 0.2957 0.3377
Diam12 0.0261 0.0808 0.1415 0.2035 0.2654 0.3301 0.3696
D12 - 0.0169 0.0092 0.0638 0.1246 0.1866 0.2484 0.3132 0.3527
Lambda c -0.0020 -0.0076 -0.0069 -0.0041 -0.0012 0.0045 -0.0004
Lambda f * 1e5 -0.85 -7.96 -9.81 -7.00 -2.41 9.81 -1.00
Lambda f / rho -0.062 -0.577 -0.711 -0.507 -0.174 0.711 -0.072
u * 1E6 0.11 0.99 1.22 0.87 0.30 -1.22 0.12
Wavefront 0.00 0.87 1.61 1.84 1.55 0.21 0.00
Rated wavefront error < 1/10th wave PV across both diameters
Polish, diffraction edge excellent; figure of revolution, smoothness fine.
Arithmetic wavefront error = 1 / 11.7 wave at zone 4 (average both diameters)
Results for individual diameters:
Reading Diam1-1: 1 / 10.6 lambda, Max Trans Aberration=0.80
Reading Diam1-2: 1 / 11.9 lambda, Max Trans Aberration=0.80
Reading Diam2-1: 1 / 11.6 lambda, Max Trans Aberration=0.65
Reading Diam2-2: 1 / 11.2 lambda, Max Trans Aberration=0.70
|