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:
Jul. 13, 1993
Filed:
Jul. 22, 1991
Satoshi Miyazaki, Tokyo, JP;
Junichi Itoh, Tokyo, JP;
Yasuo Tanbara, Tokyo, JP;
Mitsuo Kawazoe, Tokyo, JP;
Olympus Optical Co., Ltd., Tokyo, JP;
Abstract
A photographing lens system includes at least one zooming lens. A photometric circuit measures brightness of an object. An exposure calculation circuit calculates an exposure value in accordance with an output from the photometric circuit. A distance measurement circuit measures a distance to the object. A magnification setting circuit determines a photographing magnification of an image of the object to be formed on a film arranging surface. An auto-zooming calculation circuit determines a focal length of the photographing lens system in accordance with an output from the magnification setting circuit, and an output from the distance measurement circuit. A drive circuit drives the zooming lens in accordance with an output from the auto-zooming calculation circuit. A switch is turned on upon a first stroke of a release button. A switching circuit outputs a first value in accordance with a setting value of the magnification setting circuit before the switch is turned on, and outputs a second value according to an output from the exposure calculation circuit after the switch is turned on. A display selectively displays the first and second values.