Variable focal length optical system

Details Variable focal length optical system Variable focal length optical system

1996-09-12

1998-11-10

Font, Frank G.

Optical: systems and elements

Lens

Multiple component lenses

359781, G02B 958, G02B 934

Patent

active

058352872

ABSTRACT:
A variable focal length optical system includes, in succession from an object side, a first lens component, a second lens component, a third lens component, and a fourth lens component, wherein at least two air gaps of a first air gap between the first lens component and the second lens component, a second air gap between the second lens component and the third lens component, and a third air gap between the third lens component and the fourth lens component change when the focal length of the zoom lens is changed.

REFERENCES:
patent: 4787718 (1988-11-01), Cho
patent: 4856880 (1989-08-01), Ohshita
patent: 5111338 (1992-05-01), Nakayama
patent: 5270865 (1993-12-01), Kikuchi et al.
patent: 5283693 (1994-02-01), Kohno et al.
patent: 5381269 (1995-01-01), Estelle
patent: 5406416 (1995-04-01), Ohtake
patent: 5483380 (1996-01-01), Nozawa
patent: 5519540 (1996-05-01), Suzuki
patent: 5523888 (1996-06-01), Nishio

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