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:
Jan. 08, 1991
Filed:
Dec. 19, 1989
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
The present patent application discloses a flash device for camera, or a camera, including a light emitter for flash photography mounted about a pivot shaft on the camera body and a light condenser mounted about a pivot shaft on the photographic lens barrel which moves to vary the light distribution characteristics of the light emitter as the focal length of the photographic optical system varies, wherein when the flash device is in use, the light condenser moves as the focal length of the photographic optical system varies, thus making it possible to obtain the light distribution characteristic which is suited to the focal length of the photographic optical system, while when not in use, the light emitter and the light condenser are turned to be integrally housed in an appropriate plate of either the lens barrel or the camera body.