Camera lens systems

Details Camera lens systems Camera lens systems

1997-08-07

1999-06-22

Epps, Georgia

Optical: systems and elements

Lens

Reverse telephoto

359751, 359752, G02B 1304

Patent

active

059148233

ABSTRACT:
In an image forming optical lens system comprising in order from the object end a first lens group of at least two components, a second lens group which has a positive focal length and comprises in order from the object end a first component of positive power, a second component of negative power and a third component of positive power, and a third lens group of at least one component, the components of the lens system are made of at least two different kinds of materials having differences in dispersion of 0.0055 at the greatest from one another and the first to third components of the second lens group are made of materials different in dispersion from one another.

REFERENCES:
patent: 4206973 (1980-06-01), Ikemori

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