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. 11, 2009
Filed:
Jun. 05, 2008
Applicants:
Motoo Takada, Saitama, JP;
Ryoichi Koseki, Saitama, JP;
Kazuya Takahashi, Saitama, JP;
Yoshimitsu Iizuka, Saitama, JP;
Inventors:
Motoo Takada, Saitama, JP;
Ryoichi Koseki, Saitama, JP;
Kazuya Takahashi, Saitama, JP;
Yoshimitsu Iizuka, Saitama, JP;
Assignee:
Nihon Dempa Kogyo Co., Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
B32B 37/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
An optical device, such as an optical low-pass filter, and a production method therefor, which prevents damage, and thus maintains optical characteristics are provided. The optical device includes a plurality of optical plates joined together with adhesive. The adhesive is spread to extend to the peripheral edge of the optical plates and to the outer periphery of the principal plane surrounding the plurality of optical plates, thus forming a protective coating.