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:
Oct. 07, 2014
Filed:
Jun. 16, 2010
Takayoshi Suganuma, Saitama, JP;
Takayoshi Suganuma, Saitama, JP;
Enplas Corporation, Saitama, JP;
Abstract
Provided is a light-guiding substrate that can propagate light, which has been emitted by means of a light emitting device, in a confined state with an efficiency as high as possible. An optical system provided with the light-guiding substrate is also provided. The light-guiding substrate () generates 0-order light and +− first-order light by diffracting, by means of a first sub wavelength diffracting grating (), light which has been inputted from the light emitting device () via a collimation lens (), generates +− first-order light by reflecting/refracting, by means of a second sub wavelength diffracting grating (), the 0-order light that has passed through the first sub wavelength diffracting grating (), and propagates the +− first-order light, which has been generated by means of the first sub wavelength diffracting grating (); and the second sub wavelength diffracting grating (), in the direction that orthogonally intersects the thickness direction, while totally reflecting the light by means of both the surfaces () of the substrate main body () in the thickness direction.