Zoom lens and imaging device having the same

Details Zoom lens and imaging device having the same Zoom lens and imaging device having the same

2009-02-17

2010-12-28

Sugarman, Scott J (Department: 2873)

Optical: systems and elements

Lens

With variable magnification

C359S683000, C359S684000, C359S685000, C359S686000, C359S693000

Reexamination Certificate

active

07859767

ABSTRACT:
A zoom lens including, in an order from an object side to an image side, a first lens group having a positive refracting power, a second lens group having a negative refracting power, and a rear group including at least one lens group, the zooming operation being performed by changing a spacing of the lens groups, wherein the zoom lens has an aperture stop and, when the second lens group is taken as a first focus group and a sub-lens group constituting a portion of one lens group of the rear group is taken as a second focus group, the lens structure and the movement amount of the first and second focus groups are set appropriately.

REFERENCES:
patent: 5701204 (1997-12-01), Matsumoto
patent: 2007/0195425 (2007-08-01), Arai
patent: 4-127111 (1992-04-01), None
patent: 7-140389 (1995-06-01), None
patent: 11-258506 (1999-09-01), None

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