Electronic imaging system

Details Electronic imaging system Electronic imaging system

2007-06-12

2007-06-12

Sugarman, Scott J. (Department: 2873)

Optical: systems and elements

Lens

Telephoto

C359S781000, C359S784000

Reexamination Certificate

active

10417131

ABSTRACT:
The invention relates to an electronic imaging system wherein an image pickup device is horizontally located while ensuring the space for a reflective member thereby achieving height, length and cost reductions. The imaging system comprises a taking lens and an image pickup device. The taking lens comprises a front lens group G1consisting of a negative lens component and a positive lens component and having positive refracting power and a rear lens group G2consisting of a negative lens element and a positive lens element and having positive refracting power, with an aperture stop S interposed between the front lens group G1and the rear lens group G2. The taking lens satisfies conditions (1) and (2).in-line-formulae description="In-line Formulae" end="lead"?2.8<fB/IH<4.5   (1)in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?2<SF<3   (2)in-line-formulae description="In-line Formulae" end="tail"?Here fBis back focus of the taking lens, IH is a length that is half the diagonal length of the effective plane of the electronic image pickup device, and SF is a shape factor for the negative lens component in the front lens group.

REFERENCES:
patent: 4260223 (1981-04-01), Hamanishi
patent: 4395094 (1983-07-01), Hamanishi
patent: 4784480 (1988-11-01), Yokota et al.
patent: 2002/0041451 (2002-04-01), Harada

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