Two-unit zoom lens

Details Two-unit zoom lens Two-unit zoom lens

1992-10-16

1996-09-03

Sugarman, Scott J.

Optical: systems and elements

Lens

With variable magnification

359717, G02B 1514, G02B 1318

Patent

active

055529364

ABSTRACT:
A two-unit zoom lens comprises a first lens unit having a negative refracting power and a second lens unit having a positive refracting power. The first lens unit and the second lens unit are located in this order from the side of an object. At least either one of the first lens unit and the second lens unit is moved such that a distance between the first lens unit and the second-set lens unit, which distance is taken along an optical axis, may change, and a focal length of the whole two-unit zoom lens is thereby changed continuously. Each of the first lens unit and the second lens unit is constituted of a single lens component having at least a single aspherical surface.

REFERENCES:
patent: 3116359 (1963-12-01), Solisch
patent: 5005955 (1991-04-01), Ohshita
patent: 5270867 (1993-12-01), Estelle
patent: 5283693 (1994-02-01), Kohno et al.
patent: 5305148 (1994-04-01), Ikemori et al.

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