Lens system

Details Lens system Lens system

1999-08-11

2000-12-12

Sugarman, Scott J.

Optical: systems and elements

Lens

With variable magnification

359654, G02B 1514, G02B 300

Patent

active

061606693

ABSTRACT:
A lens system composed of a first lens unit, a second lens unit having a positive refractive power, a third lens unit having a negative refractive power, and a fourth lens unit having a positive refractive power. The lens system is composed of a small number of lens components and configured compact by disposing at least one radial type gradient index lens component in the second lens unit and selecting an adequate refractive index distribution for the radial type gradient index lens component.

REFERENCES:
patent: 5046833 (1991-09-01), Tsuchida
patent: 5117308 (1992-05-01), Tsuchida et al.
patent: 5157550 (1992-10-01), Tsuchida et al.
patent: 5268791 (1993-12-01), Tsuchida
patent: 5268792 (1993-12-01), Kreitzer et al.
patent: 5359456 (1994-10-01), Kikuchi
patent: 5416639 (1995-05-01), Yamanashi
patent: 5729389 (1998-03-01), Nagaoka

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