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. 23, 2010
Filed:
Feb. 01, 2008
Applicants:
Richard I. Billmers, Langhorne, PA (US);
Elizabeth J. Billmers, Langhorne, PA (US);
Mary E. Ludwig, Hellertown, PA (US);
Joseph David Matchett, Mantua, NJ (US);
Inventors:
Richard I. Billmers, Langhorne, PA (US);
Elizabeth J. Billmers, Langhorne, PA (US);
Mary E. Ludwig, Hellertown, PA (US);
Joseph David Matchett, Mantua, NJ (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 5/32 (2006.01);
U.S. Cl.
CPC ...
Abstract
A narrowband filter with a wide acceptance angle which utilizes two holographic filter elements connected in series. The filter blocks light outside of a narrow spectral band of interest, while enabling light to be seen over a wide range of angles incident on the filter.