Photography – With exposure objective focusing means – focusing aid – or... – Optical detail with photoelement system
Reexamination Certificate
2005-04-13
2009-06-16
Aurora, Reena (Department: 2862)
Photography
With exposure objective focusing means, focusing aid, or...
Optical detail with photoelement system
Reexamination Certificate
active
07548687
ABSTRACT:
In a camera of the invention, during focus detection, luminous flux from an object is transmitted by a main mirror via an imaging lens, and then, is reflected by a reflection face of a sub-mirror. The reflected luminous flux is reflected by the main mirror, passes through a field stop, and is reflected by a guide mirror. The luminous flux reflected by this guide mirror is incident on a photoelectric converter element through a diaphragm and a refocusing lens. The luminous flux reflected by the main mirror reaches an eyepiece lens through a focusing glass and a pentaprism. During imaging, the main mirror and the sub-mirror are retracted from the imaging optical path. The luminous flux having passed through the imaging lens is guided to an image pickup device via an infrared filter and a low-pass filter.
REFERENCES:
patent: 5109154 (1992-04-01), Higashihara et al.
patent: 5424528 (1995-06-01), Goto
patent: 5839001 (1998-11-01), Ohtaka et al.
patent: 6175692 (2001-01-01), Onoda et al.
patent: 6424805 (2002-07-01), Ohsawa
patent: 2-886865 (1999-02-01), None
patent: 2001-141980 (2001-05-01), None
patent: 3-363683 (2002-10-01), None
Aurora Reena
Kenyon & Kenyon LLP
Olympus Corporation
LandOfFree
Focus detecting apparatus and optical device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Focus detecting apparatus and optical device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Focus detecting apparatus and optical device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4146114