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:
Mar. 04, 1997
Filed:
Sep. 16, 1994
Noriaki Tokuda, Kanagawa-ken, JP;
Nikon Corporation, Tokyo, JP;
Abstract
An image sensor prevented from detecting interference fringes even if illuminating light of high coherence is used. The image sensor has a light-receiving clement and a protective member (lid), which are integrally secured to a package. An anti-reflection coating for illuminating light is formed on the surface of the light-receiving element, or the distance between the surface of the light-receiving element and the light-receiving element-side surface of the lid is determined to be not shorter than a half of the coherence length of the illuminating light. Alternatively, the protective member is inclined with respect to the surface of the light-receiving element. Since the image sensor detects no interference fringes, it is possible to improve the accuracy of observation, image processing and measurement, etc.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile