Adjustable chromatic correction lens

Details Adjustable chromatic correction lens Adjustable chromatic correction lens

1998-02-23

1999-11-23

Epps, Georgia

Optical: systems and elements

Lens

Multiple component lenses

359642, 359750, G02B 900, G02B 300, G02B 1304

Patent

active

059910992

ABSTRACT:
An imaging lens device at f/4 has zoomlike variable chromatic and spherochromatic correction for imagery in each of the astronomical U, B, V, and R bands. This lens system can thus take advantage of the full usable wavelength range of CCD cameras extending from 0.35-0.9 micrometers. A first triplet lens group effects the chromatic correction by altering separation between lens elements of the triplet while a second triplet lens group maintains a sharp image focus.

REFERENCES:
patent: 3924934 (1975-12-01), Grey
patent: 5103342 (1992-04-01), Kataoka

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