Difference between revisions of "Equi-Angular Lens"
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Revision as of 10:05, 25 February 2009
2-2-150
A prismatic lens obtained by the rotation of an equi-angular profile about the optical axis of the lens. In such a lens, the bullseye and rings usually present a continuous convex surface towards the source.
Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)
