Slit Image Test

Slit Image Test
Overview	Computations	Setup	Home

In (SlitTest.xls):
	(Example 20" f/3.9 mirror.)
	Sheet Mask:
		B1 = Mask hole size.
		B2 = Mirror diameter.
		B3 = ROC
		B4 = Chamfer.
		B5 = Router Mask Jig - one turn of the lead screw (A24:K34)
			Solve for the h's - Cells D13:D21 use macro "control r".
	Sheet CCD:
		CCD:
			H2 = E-300 Pixels/inch 4771
			G2 = The E-300 Lens mount to CCD spacing [3]
			F2 = Slit to lens mount distance
			J2 = The E-300 CCD glass thickness [2]
			K2 = The E-300 CCD glass index of refraction [2]
		FILM:
			D2 = Slit to image plane (usually zero).
			H2 = Scanned DPI.
		Copy ImageJ's Results.xls B2:B16 to SlitTest.xls E2:E16
			Solve for the Foucaults - Cells F18:F23 use macro "control m".


Figure 1 SlitTest.xls Sheet CCD

Using Notepad type (paste) the following info from the spreadsheet to create file Sixtests_input.txt - Figure 3

In Sixtests.exe
	*File->Open setup*
		Navigate to file *Sixtest_input.txt*
		Click Open
	Click *Surface* getting - Figure 4:

Source & Image Not In Same Plane - Figure 5

		Y_diff is the pixel distance between slit pairs
		Y_i = (Y_diff/pixels per inch)/2 i.e., a negative value. Y_n=mx+b; m=R/h; b=-Rl/h; x=n Y_n=R/h(n-l)

Source & Image In Same Plane - Figure 6

References

[1]	Karine and Jean-MarcLecleire, A Manual for Amateur Telescope Making. http://www.willbell.com/tm/atmmanual/index.htm
[2]	Kodak Spec KAF-8300CE
[3]	E-300 Lens mount to CCD spacing http://www.markerink.org/WJM/HTML/mounts.htm
[4]	Mirror Math Jim Burrows http://home.earthlink.net/~burrjaw/atm/atm_math.lwp/atm_math.htm
[5]	Foucault Test by Leon Foucault 1858 http://bobmay.astronomy.net/foucault/leontop.htm
[6]	Lateral Wire Test (LWT) · John Francis suggested a variation of the Caustic.