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. 16, 2012
Filed:
Jul. 03, 2008
Kazuhiro Yamada, Saitama, JP;
Hidenori Takushima, Saitama, JP;
Ken Hirunuma, Tokyo, JP;
Takanobu Shiokawa, Kanagawa, JP;
Kazuhiro Yamada, Saitama, JP;
Hidenori Takushima, Saitama, JP;
Ken Hirunuma, Tokyo, JP;
Takanobu Shiokawa, Kanagawa, JP;
Pentax Ricoh Imaging Company, Ltd., Tokyo, JP;
Abstract
An optical low-pass filter is disposed on a light-receiving surface of an imaging device. The filter has a light-transmitting substrate including at least one birefringent plate and an infrared-cut plate , a dust-proofing layer provided on a light-input surface of the light-transmitting substrate, and an infrared-cut coat layer provided between the dust-proofing layer and the light-transmitting substrate or on a light-output surface of the light-transmitting substrate. A surface of the dust-proofing layer contains fine roughness.