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:
Jun. 01, 1982
Filed:
Jun. 24, 1980
Youichi Okuno, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A view finder for a camera includes an eye piece and an optical system having an optical axis to direct light from a certain view field towards the eye piece. A reflecting device directs light from outside the view field through the optical system at a given angle relative to the optical axis, and a sub-prism is arranged relative to the optical system to direct the light from outside the view field toward the eye piece after the light passes through the optical system. The sub-prism has a light incident plane, a light reflecting plane and a light emitting plane all of which are arranged so that after the light from outside the view field passes through the optical system, it enters the sub-prism through the light incident plane. The light is thereafter reflected from the reflecting plane so that it leaves the sub-prism from the light emitting plane.