Yet another ronchigram question

Hello:
When looking at a ronchigram, are the dark (or bright) bands 1 wave apart? It's tempting to interpret the ronchigram like a interferogram, and qualitatively you sort of can as I understand it. But is the ronchigram quantitatively like a interferogram? Or does the spacing between dark bands (in waves of error) dependent on the lines/mm of the grating?

Cheers
Mike Connelley

Micheal,

Here's a link to the pretty good site for the basics of Ronchi test interpretation. It should answer your questions much better than I ever could. Enjoy!


http://www.users.bigpond.com/pjifl/ronchi_interpretation_basic.html


dan