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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.:

US 5739855 B1

PDFFull Text
Date of Patent:
Apr. 14, 1998

Filed:

Dec. 20, 1995

Optical low-pass filtering

Applicant:
Inventors:

Petrus G Centen, Breda, NL;

Franciscus P Van De Weegen, Breda, NL;

Pieter P Brouwer, Breda, NL;

Assignee:

U.S. Philips Corporation, New York, NY (US);

Attorney:

Belk; Michael E.

Primary Examiner:

Andrew Faile

Assistant Examiner:

Jacqueline B Wilson

Int. Cl.
CPC ...
H04N / ; G02B / ;
U.S. Cl.
CPC ...
348342 ; 359497 ;
Abstract

In a camera including an image sensor (4R, 4G, 4B) having a sampling frequency (fs), and an optical low-pass filter arrangement arranged in an optical path with the image sensor (4R, 4G, 4B), the optical low-pass filter arrangement comprises a first birefringent optical filter element having a frequency response with a frequency trap point at the sampling frequency (fs) of the image sensor (4R, 4G, 4B), and a second birefringent optical filter element having a frequency response with a first frequency trap point at two thirds of the sampling frequency (fs) of the image sensor (4R, 4G, 4B), and a second frequency trap point at twice the sampling frequency (fs) of the image sensor (4R, 4G, 4B).

Find Patent Forward Citations

Centen, Petrus. (1998). Optical low-pass filtering (U.S. Patent No. 5739855). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5739855

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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