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It is discussed zooming loci of movable components in several types of mechanically compensated zoom lenses. They are a fundamental type (a variable afocal converter), a basic two-component type and a standard four-component type. A simultaneous zoom equation for each type, which satisfies simultaneously two paraxial requirements for zooming, namely, variation of paraxial value and stationary distance between an object and its image is derived. A set of analytical solutions to each type is obtained together with a numerical example. More general discussion is also added.
Kazuo Tanaka
"Zooming-component loci of mechanically compensated zoom lenses", Proc. SPIE 3729, Selected Papers from International Conference on Optics and Optoelectronics '98, (29 April 1999); https://doi.org/10.1117/12.346823
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Kazuo Tanaka, "Zooming-component loci of mechanically compensated zoom lenses," Proc. SPIE 3729, Selected Papers from International Conference on Optics and Optoelectronics '98, (29 April 1999); https://doi.org/10.1117/12.346823