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:
Feb. 28, 1995
Filed:
Dec. 15, 1993
Katsuya Ono, Tokyo, JP;
Masaru Shiraiwa, Tokyo, JP;
Olympus Optical Co., Ltd., Tokyo, JP;
Abstract
An observation system for an endoscope has an entrance end face upon which an image is incident and an exit end face from which the image exits. The system comprises an image guide fiber of a very small diameter to allow transmission of the image, an object optical system arranged in front of the entrance end face of the image guide fiber, and a reproduction optical system arranged on the back side of the exit end face of the image guide fiber. The reproduction optical system is comprised of an eyepiece optical system and relay lens system. The maximal exit numerical aperture of the object optical system is greater than the maximal entrance numerical aperture of the reproduction optical system.