Zoom lens system and image-taking apparatus having the same

Details Zoom lens system and image-taking apparatus having the same Zoom lens system and image-taking apparatus having the same

2006-12-12

2006-12-12

Sugarman, Scott J. (Department: 2873)

Optical: systems and elements

Lens

With variable magnification

C359S708000

Reexamination Certificate

active

07149037

ABSTRACT:
A zoom lens system includes plural optical units each of which includes plural optical elements each having a rotationally asymmetrical surface, and changes optical power as the optical elements in each of the plural optical units move in directions different from an optical axis, wherein a principal point position moves in an optical-axis direction without causing the optical element to move in the optical-axis direction, the zoom lens system having such a shape that the principal point position of at least one unit of the plural optical units is located outside the one unit.

REFERENCES:
patent: 3305294 (1967-02-01), Alvarez
patent: 3583790 (1971-06-01), Baker
patent: 4925281 (1990-05-01), Baker
patent: 6603608 (2003-08-01), Togino
patent: 64-35964 (1989-02-01), None
patent: 09-005650 (1997-01-01), None
English Abstract for Japanese Application No. 64-35964.
English Abstract for Japanese Application No. 09-005650.

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