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. 22, 2006
Filed:
May. 21, 2002
Takashi Harada, Machida, JP;
Kazuhiko Mizuno, Hachioji, JP;
John A. Wheatley, Lake Elmo, MN (US);
Timothy J. Nevitt, Red Wing, MN (US);
Andrew J. Ouderkirk, Woodbury, MN (US);
Takashi Harada, Machida, JP;
Kazuhiko Mizuno, Hachioji, JP;
John A. Wheatley, Lake Elmo, MN (US);
Timothy J. Nevitt, Red Wing, MN (US);
Andrew J. Ouderkirk, Woodbury, MN (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
A detector system, filter therefor, and method of making same is disclosed. The filter includes an interference element having a reflection band disposed primarily in the near infrared, and having a high transmission over most of the visible region. The filter also includes an absorptive element that absorbs light non-uniformly over the visible region. The filter when combined with a semiconductor photodiode or other suitable detector yields a detector system whose spectral responsivity closely matches the visual response of the human eye.