Image stabilizing optical system

Details Image stabilizing optical system Image stabilizing optical system

1991-05-15

1994-05-24

Henry, Jon W.

Optical: systems and elements

Image stabilization

359557, 359832, 359666, 359676, 359683, 359688, G02B 2764, G02B 506

Patent

active

053154355

ABSTRACT:
This specification discloses an image stabilizing photo-taking lens system having a lens system in which a plurality of lens units are disposed and at least one lens spacing is changed to change the focal length, and a variable vertical angle prism unit whose vertical angle is changed and driven to refract the optic axis immediately rearwardly of a predetermined lens surface which satisfies the condition that .vertline.Fa.vertline.<10 Ft, where Fa is the combined focal length from the front lens surface of the lens system to the predetermined lens surface, and Ft is the focal length of the entire lens system at the telephoto end thereof.

REFERENCES:
patent: 3503663 (1970-03-01), de la Cierva et al.
patent: 3531176 (1970-09-01), Humphrey
patent: 3941451 (1976-03-01), Humphrey
patent: 3942862 (1976-03-01), Furukawa et al.
patent: 3944324 (1976-03-01), Tajima et al.
patent: 4927250 (1990-05-01), Suda
patent: 5040881 (1991-08-01), Tsuji
patent: 5069537 (1991-12-01), Kitagishi

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