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:
Dec. 11, 1990
Filed:
Nov. 15, 1989
Akira Yokota, Sagamihara, JP;
Olympus Optical Co., Ltd., Tokyo, JP;
Abstract
An image pickup system for endoscopes includes an image guide fiber bundle, a light guide fiber bundle, an imaging lens unit having optical low-pass filters, and a solid-state image pickup device. Further, a first optical low-pass filter having a spatial frequency response depending on an array of fibers of the image guide fiber bundle and a second low-pass filter having a spatial frequency response depending on a sampling frequency of the solid-state image pickup device can also be provided between the image guide fiber bundle and the solid-state image pickup device. Thus, even in the image guide fiber bundle which is different in effective diameter and core diameter and has a disorderly array of fibers, the generation of moire can be prevented without reducing resolution.