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. 28, 2012
Filed:
May. 22, 2009
Alistair P. Curd, High Wycombe, GB;
Alistair P. Curd, High Wycombe, GB;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A structure for reducing internal reflections in an optical system includes a stack of layers including a first layer having a first refractive index, a second layer having a second refractive index, a third layer having a third refractive index, a fourth layer having a fourth refractive index, and a fifth layer having a fifth refractive index. The second layer is arranged between the first layer and the third layer, and the fourth layer is arranged between the third layer and fifth layer. Further, the third refractive index is greater than the second and fourth refractive indexes, the second refractive index is greater than the first refractive index, and the fourth refractive index is greater than the fifth refractive index.