Slit Image Test
Overview Computations Alignment/Imaging Home
The orginal image is a 24 meg tiff file, which was cropped and then jpg'ed down to 660 k. Do to the jpg compression and cropping your results will not exactly match that of the web.
    For example:
       After Photoshop Rotate Arbitrary CCW 2.97 of the jpg image, I get 165 pixels for the left outer slit, and 3202 for the right outer slit. The difference is 3037 pixels. The web site difference (3225-188) is 3037 pixels.
The web zone pixel differences are:
   13.8% 467
   27.6% 931
   41.5% 1389
   55.3% 1835
   69.1% 2258
   82.9% 2662
   96.7% 3037
To get the image click here and then do a File->Page Save As  

© 2008 Bill Thomas
mailto:bthomas32000@yahoo.com