Optical Design With Air Lenses

David Shafer

doi:10.1117/12.935430

26 October 1983 Optical Design With Air Lenses

David Shafer

Proceedings Volume 0399, Optical System Design, Analysis, and Production; (1983) https://doi.org/10.1117/12.935430
Event: 1983 International Technical Conference/Europe, 1983, Geneva, Switzerland

Abstract

The air gap between adjacent lenses can be regarded as an "air lens" imbedded in glass. In many situations these air lenses, in glass, have glass lens equivalents, in air. The resulting new designs, when certain of the original air lenses are removed, often have distinctly better aberration correction, or other features that are desirable, such as a different system length. This transformation is easiest when the air lens that is to be removed has a nearly concentric meniscus shape. The glass lens equivalent then has about the same shape, and is located outside the two lenses bounding the air gap. The latter disappears and the two adjacent lenses combine into a single lens. Examples of this transformation, and the resulting benefits, are shown for an air-spaced aplanatic doublet, a Cooke triplet, and a Houghton catadioptric system. This point of view is very useful for generating new design variations from well-known types.

Citation Download Citation

David Shafer "Optical Design With Air Lenses", Proc. SPIE 0399, Optical System Design, Analysis, and Production, (26 October 1983); https://doi.org/10.1117/12.935430

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