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. 06, 2009
Filed:
Jan. 13, 2006
Katsuya Nakamura, Kanagawa, JP;
Tatsuo Ohta, Otsuki, JP;
Setsuo Tokuhiro, Tokorozawa, JP;
Kunihiko Taka, Musashino, JP;
Shingo Nakamura, Hachioji, JP;
Katsuya Nakamura, Kanagawa, JP;
Tatsuo Ohta, Otsuki, JP;
Setsuo Tokuhiro, Tokorozawa, JP;
Kunihiko Taka, Musashino, JP;
Shingo Nakamura, Hachioji, JP;
Konica Minolta Opto, Inc., Tokyo, JP;
Abstract
An antireflection coating provided on an optical element which passes through at least two wavelengths of light in the wavelength range of 1300-1600 nm, wherein the antireflection coating comprises: a high refractive index layer; a low refractive index layer having a refractive index lower than a refractive index of the high refractive index layer; and a supplementary layer having a composition different from a composition of the high refractive index layer or from a composition of the low refractive index layer, and being provided adjacent to the high refractive index layer or to the low refractive index layer.