Image capturing unit and image capturing device

Details Image capturing unit and image capturing device Image capturing unit and image capturing device

2006-05-09

2006-05-09

Perkey, W. B. (Department: 2851)

Photography

Having variable focal length of camera objective

C348S240300, C359S666000

Reexamination Certificate

active

07043153

ABSTRACT:
An image capturing unit comprises a variable optical element, an optical unit, and a light-flux limiting section. The variable optical element includes a first liquid member, a second liquid member, and a container which contains the first liquid member and the second liquid member. An interfacial shape between the first liquid member and the second liquid member varies according to a voltage which is applied to the liquid members. The light-influx limiting section satisfies following conditionin-line-formulae description="In-line Formulae" end="lead"?0.1<(Φ−2×h)<20.0in-line-formulae description="In-line Formulae" end="tail"?where Φ (mm) indicates a maximum diameter for an axial light-flux in the variable optical element and h (mm) indicates a highest position of the axial light-flux on the light-incident end of the variable optical element. By doing this, it is possible to restrict a flare light and a ghost light and prevent impurities in the liquid members from being observed in the captured image.

REFERENCES:
patent: 6658208 (2003-12-01), Watanabe et al.
patent: 6702483 (2004-03-01), Tsuboi et al.
patent: 6806988 (2004-10-01), Onuki et al.
patent: 6934090 (2005-08-01), Nagaoka et al.
patent: 2002/0176148 (2002-11-01), Onuki et al.
patent: 2001-249203 (2001-09-01), None
patent: 2001-249261 (2001-09-01), None
Claude Gabay et al.:Dynamic study of a Varioptic variable focal lens, Proceedings of SPIE, vol. 4767 (2002).

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