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:
Dec. 13, 2005
Filed:
Mar. 12, 2003
George Barbastathis, Boston, MA (US);
Sang-gook Kim, Wayland, MA (US);
Wei-chuan Shih, Cambridge, MA (US);
Chee Wei Wong, Cambridge, MA (US);
Yong-bae Jeon, Lexington, MA (US);
George Barbastathis, Boston, MA (US);
Sang-Gook Kim, Wayland, MA (US);
Wei-Chuan Shih, Cambridge, MA (US);
Chee Wei Wong, Cambridge, MA (US);
Yong-Bae Jeon, Lexington, MA (US);
Massachusetts Institute of Technology, Cambridge, MA (US);
Abstract
A volume diffractive composite is disclosed for providing illumination at a first output angle. The volume diffractive composite comprises a first plurality of grating elements that are mutually spaced from another in a first position with a first spacing period along a first plane, and an actuation unit for changing at least one of the position or the spacing period of the first plurality of grating elements to a second position or spacing period to provide illumination at a second output angle.