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. 03, 1993
Filed:
May. 18, 1990
Pioneer Electronic Corporation, Tokyo, JP;
Abstract
An optical device with an improved efficiency in the transmission of light through the device is disclosed. The device having an optical element in a block shape which is made up of a first plane on which incident light is presented at a predetermined incidence angle. The incident light is transmitted through the first plane and is reflected off of another plane which is oriented at a predetermined angle with respect to a plane perpendicular to the first plane. The reflected light is next totally transmitted through an exit plane situated parallel to the first plane. The incidence angle is predetermined so that the angle at which the light is finally transmitted with respect to the exit plane is a polarization angle satisfying Brewster's rule. Therefore, at the exit plane, the light is totally transmitted and thus none of the light is reflected, resulting in a greatly improved degree of efficiency in the transmission of light through the device.