Photography – Having variable focal length of camera objective
Reexamination Certificate
2005-07-11
2008-08-26
Koval, Melissa Jan (Department: 2862)
Photography
Having variable focal length of camera objective
C396S060000, C359S676000, C359S689000, C359S690000, C359S695000, C359S708000, C359S748000, C348S240300, C348S335000
Reexamination Certificate
active
07418199
ABSTRACT:
An imaging apparatus including a first lens unit with positive power in which the most object-side surface is concave and the most image-side surface is convex, an aperture stop, a second lens unit with positive power in which the most object-side surface is convex and the most image-side surface is concave, and a third lens unit with positive power; and an image sensor. Air spacing between the second lens unit and the third lens unit assumes the shape of a biconvex air lens. The imaging apparatus satisfies the following condition:in-line-formulae description="In-line Formulae" end="lead"?1.4≦|r2R|/IH≦15.0in-line-formulae description="In-line Formulae" end="tail"?where IH is the maximum photographic image height, which is a half of the diagonal length, in an effective imaging area, of the image sensor, and r 2R is the radius of curvature, measured along the optical axis, of the most image-side surface of the second lens unit.
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patent: 2006/0245078 (2006-11-01), Kawamura
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Kawamura Kazuteru
Nishimura Kazuya
Kenyon & Kenyon LLP
Koval Melissa Jan
Olympus Corporation and Olympus Imaging Corp.
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