SN0318 16" f/4.54 (1" plate)


		OBSIDIAN OPTICS MIRROR TEST SHEET - 1/23/04

           Comments: SN0318 McNally 16" f/4.54 
   Optical diameter: 15.9
Radius of curvature: 144.75
                f/D:  4.55
   Diffraction disc: 0.000119951

	 ZONE                1          2          3          4          5          6          7      
	h(x)              2.6900     4.0900     5.1100     5.9700     6.7100     7.3900     7.9500
	h(m)              1.3450     3.3900     4.6000     5.5400     6.3400     7.0500     7.6700
	hm**2/R           0.0125     0.0794     0.1462     0.2120     0.2777     0.3434     0.4064
	hm/4f             0.0046     0.0117     0.0159     0.0191     0.0219     0.0244     0.0265
	Diam1             0.0710     0.1470     0.2150     0.2780     0.3420     0.4090     0.4770
	Diam2             0.0540     0.1210     0.1880     0.2540     0.3200     0.3880     0.4550
	Diam12            0.0625     0.1340     0.2015     0.2660     0.3310     0.3985     0.4660
	D12 -  0.0567     0.0058     0.0773     0.1448     0.2093     0.2743     0.3418     0.4093
	Lamda c          -0.0067    -0.0021    -0.0014    -0.0028    -0.0034    -0.0016     0.0028
	Lamda f * 1e5      -3.13      -2.50      -2.27      -5.31      -7.52      -3.93       7.52
	Lamda f / rho     -0.261     -0.209     -0.189     -0.443     -0.627     -0.327      0.627
	u * 1E6             0.43       0.35       0.31       0.73       1.04       0.54      -1.04
	Wavefront           0.80       0.81       0.66       0.82       1.12       1.01       0.00
	Reference parabola: y = 0.0499128 * x**2 + 0
	passing through (  0.00,  0.00) and (  7.95,  0.00)

Maximum wavefront error = 1 / 19.3 wave at zone 5 (average of measured diameters)

Mirror wavefront error <= 1/15 wave across both diameters

Polish, diffraction edge, figure of revolution all excellent; smoothness very good
 (center third shows minor roughness)

Results for individual diameters:
	Reading Diam1: 1 / 16.4 lamda, Max Trans Abberation=0.63
	Reading Diam2: 1 / 15.1 lamda, Max Trans Abberation=0.63
 
 

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