Zoom lens and imaging apparatus

Details Zoom lens and imaging apparatus Zoom lens and imaging apparatus

2008-07-03

2009-10-13

Collins, Darryl J (Department: 2873)

Optical: systems and elements

Lens

With variable magnification

C359S678000, C359S726000

Reexamination Certificate

active

07602558

ABSTRACT:
A zoom lens is provided and includes: in order from the object side, a first lens group having a positive power and including in order from the object side, a negative lens, a reflecting member that bends an optical path by substantially 90°, and a positive lens having biconvex shape which has at least one aspherical surface; a second lens group having a negative power and including two lenses; a third lens group having a positive power; and a fourth lens group having a positive power and including in order from the object side, a cemented lens having a negative power and a positive lens having a meniscus shape which has at least one aspherical surface and a convex surface on the object side. The zoom lens is adapted to change a magnification thereof by moving the second lens group and forth lens group, and satisfies specific conditional equations.

REFERENCES:
patent: 7295380 (2007-11-01), Sueyoshi et al.
patent: 7315423 (2008-01-01), Sato et al.
patent: 7372635 (2008-05-01), Morooka et al.
patent: 2007/0285520 (2007-12-01), Kuroda
patent: 2000-131610 (2000-05-01), None
patent: 2004-354869 (2004-12-01), None
patent: 2006-267862 (2006-10-01), None

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