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Ed Jones
Pooh-Bah
Reged: 04/06/04
Posts: 1415
Loc: Sin-sin-atti
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Re: flat mirror tests
07/03/09 11:58 AM
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It occurs to me that another way to do this without a collimator lens is to photograph the fringes in a well defined setup. Knowing the water thickness accurately and the distance to the camera you could calculate how many rings of power you would expect to see then using a fringe analysis program like Fringe XP subtract them out to get the true wavefront. You would need to make a fixture sort of like a spherometer but with a needle tip to measure the water thickness exactly. It might be worth contacting Dave Rowe to see what it would take to do this. You could then use a light box like Dave built. What do you think?
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Ed Jones
Edited by Ed Jones (07/03/09 12:31 PM)
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