Variable focal length optical system

Details Variable focal length optical system Variable focal length optical system

1996-09-18

1998-06-09

Font, Frank G.

Optical: systems and elements

Lens

Multiple component lenses

359748, G02B 904, G02B 1302

Patent

active

057644268

ABSTRACT:
A variable focal length optical system includes, in the following order from an object side, a first lens unit having a negative refractive power and a second lens unit having a positive refractive power, wherein the focal length of an entire lens system changes when a distance between the first lens unit and the second lens unit is changed, and the following condition is satisfied:

REFERENCES:
patent: 5253114 (1993-10-01), Lee et al.
patent: 5289317 (1994-02-01), Ikemori et al.
patent: 5371631 (1994-12-01), Takada
patent: 5574599 (1996-11-01), Hoshi et al.
patent: 5652678 (1997-07-01), Suzuki et al.

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