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:
Nov. 22, 2016
Filed:
Jan. 24, 2014
Chieko Hatashita, Kanagawa, JP;
Takayuki Nakamura, Kanagawa, JP;
Kentaroh Hagita, Miyagi, JP;
Toshiya Yamaguchi, Kanagawa, JP;
Chieko Hatashita, Kanagawa, JP;
Takayuki Nakamura, Kanagawa, JP;
Kentaroh Hagita, Miyagi, JP;
Toshiya Yamaguchi, Kanagawa, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An optical element having an antireflection effect includes an incident plane and an emission plane and a conical microstructure formed on at least one plane of the incident plane and the emission plane. The conical microstructure includes a first structure formed of a plurality of conical microprojections with an average height Hand a second structure formed of a plurality of conical microrecesses with an average height H. The average height Hsatisfies an inequality H≦1/3*λ/n and the average height Hsatisfies an inequality H≦1/3*λ/n. An average pitch P between the first structure and the second structure satisfies following conditions: H/2≦P≦1/3*λ/n, and H/2≦P≦1/3*λ/n, in which the use wavelength is defined as λ and the refractive index relative to the use wavelength is n.