SN0210 Goar 13.1" f/4.7 (1.5" Pyrex)

        		
			OBSIDIAN OPTICS MIRROR TEST SHEET 

           Comments: SN0210 Goar 13.1" f/4.7 
   Optical diameter: 13.03
Radius of curvature: 122.88
                f/D:  4.72
   Diffraction disc: 0.000124257

	ZONE                1          2          3          4          5          6      
	h(x)              2.3900     3.6300     4.5400     5.2900     5.9600     6.5200
	h(m)              1.1950     3.0100     4.0850     4.9150     5.6250     6.2400
	hm**2/R           0.0116     0.0737     0.1358     0.1966     0.2575     0.3169
	hm/4f             0.0049     0.0122     0.0166     0.0200     0.0229     0.0254
	Diam1             0.0890     0.1480     0.2110     0.2690     0.3320     0.3900
	Diam2             0.1040     0.1660     0.2290     0.2880     0.3490     0.4050
	Diam12            0.0965     0.1570     0.2200     0.2785     0.3405     0.3975
	D12 -  0.0820     0.0145     0.0750     0.1380     0.1965     0.2585     0.3155
	Lamda c           0.0028     0.0012     0.0022    -0.0001     0.0010    -0.0014
	Lamda f * 1e5       1.38       1.51       3.59      -0.26       2.22      -3.59
	Lamda f / rho      0.111      0.121      0.289     -0.021      0.179     -0.289
	u * 1E6            -0.22      -0.25      -0.58       0.04      -0.36       0.58
	Wavefront          -0.37      -0.45      -0.76      -0.51      -0.53       0.00
	Reference parabola: y = -0.0295407 * x**2 + 0
	passing through (  0.00,  0.00) and (  6.52,  0.00)

Maximum wavefront error = 1 / 28.3 wave at zone 3 (average of measured diameters)

Mirror wavefront error <= 1/20th wave across both diameters

Polish, diffraction edge, smoothness, figure of revolution all excellent

Results for individual diameters:
	Reading Diam1: 1 / 29.2 lamda, Max Trans Aberration=0.20
	Reading Diam2: 1 / 27.4 lamda, Max Trans Aberration=0.41


 
 

© 2004 Obsidian Optics