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:
May. 31, 1983
Filed:
Oct. 10, 1980
Takeo Saito, Shikawatashi, JP;
Seiko Koki Kabushiki Kaisha, Tokyo, JP;
Abstract
An illuminating system is provided for a focus detecting device capable of producing range detection signals corresponding to the distance between the camera and the objects by receiving with a plurality of photoelectric elements the light of the objects transmitted through a fixed light passage and a movable light passage provided with a movable mirror. The illuminating light source of the illuminating system is disposed to project the illuminating light through the movable light passage. When the brightness of the objects is low, the plurality of photoelectric elements are integrated into practically a single photoelectric element to combine the outputs of respective photoelectric elements into a single output thus receiving the reflected light of the illumination and providing a focus detection signal.