The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 17, 1999
Filed:
Dec. 15, 1997
Yasuaki Ishiguro, Fujimi, JP;
Nikon Corporation, Tokyo, JP;
Abstract
A single-lens reflex camera has a mirror movable between a non-photographic position where light from a subject is transmitted to a finder optical system and a photographic position where the light is transmitted to a film plane, a focal-plane shutter normally closed to prevent the light from reaching the film plane and moved to open so as to allow the light to reach the film plane, and a removable, ordinary photograph back panel. The camera is also provided for electronic still photography with an electronic still photographic adaptor substituted for the back panel and having an image pick-up device located near the film plane when set thereon, and with an optical low-pass filter located between the focal-plane shutter and the mirror to cut off high space frequency components in space of light. The camera further has a first detection device for detecting mounting of the electronic still photographic adaptor, a second detection device for detecting mounting of the optical low-pass filter, and a control means for inhibiting the opening operation of the focal plane shutter when either one of the first and second detection devices detects no mounting, but for allowing the opening operation of the shutter when both detection devices detect the respective mountings.