Imaging optical system and image pickup apparatus

Details Imaging optical system and image pickup apparatus Imaging optical system and image pickup apparatus

2006-11-06

2008-05-06

Spector, David N. (Department: 2873)

Optical: systems and elements

Lens

With variable magnification

C348S240300

Reexamination Certificate

active

07369326

ABSTRACT:
A compact bent zooming imaging optical system characterized by sufficient aberration correction. The imagining optical system contains, in order from the object, a first lens group having positive refractive power, a second lens group with negative power which has a reflective optical element for bending the optical axis and lenses on each of the object side and the image side of the reflective optical element, and a following lens group. At least the aforementioned first lens group and following lens group are moved to change in the magnification. −0.6<φ1/φ2<−0.15 is satisfied wherein φ1 denotes the refractive power of the first lens group and φ2 indicates the refractive power of the second lens group.

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