Depth of Focus Formula
From: W. Watson (wolf_tracks_at_invalid.inv)
Date: 02/24/05
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Date: Thu, 24 Feb 2005 03:11:56 GMT
I'm looking at a formula for depth of focus on a web site, and it shows equation
depth->subscript of(diffraction) is equal to the 1.22*wavelength divided by the
sine squared of a half angle (Where the sine argumentis the half angle subtended
by the lens as seen from either the object or image plane). Anyone know where
the formula came from? Perhaps someone of historic merit derived it? Where can I
find a description or reference to it?
--
Wayne T. Watson (Watson Adventures, Prop., Nevada City, CA)
(121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time)
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