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:
Apr. 10, 2012
Filed:
Mar. 10, 2009
Kazunori Abe, Saitama, JP;
Kazunori Abe, Saitama, JP;
Fujifilm Corporation, Tokyo, JP;
Abstract
An electronic endoscope has a light guide for leading a light and a solid-state image sensor for capturing an image of a human body cavity during illumination. In inspecting the number of broken optical fibers in the light guide, a cap is attached to a distal portion of the electronic endoscope. The cap has a test chart. The solid-state image sensor captures an image of the test chart which is illuminated with the light transmitted through the light guide. A photometric circuit calculates an average luminance value 'Y' of the test chart from a chart image signal. A broken fiber number calculator calculates the number 'N' of broken optical fibers that satisfies N=M×(1−Y/I). “Y” represents an average luminance value of the test chart. “I” represents an ideal average luminance value when all optical fibers are conducting, and “M” represents the total number of the optical fibers.