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:
Nov. 16, 1999
Filed:
Sep. 19, 1997
Yuhkoh Morito, Tokyo, JP;
Shuichi Nishida, Saitama-Ken, JP;
Moritex Corporation, , JP;
Abstract
The attempt is to improve the light utilization effect by concentrating and irradiating the light on the observation area, and at the same time, to be able to simply wipe the end clean even when dirtied by oil. Optical fiber light guide 7 for illumination is arranged concentrically on the peripheral part of image incident end part 6 in of image guide 6 that has been inserted inside of pipe 2; that light exit end part 7 out is arranged closer to objective lens 3 than the focal point position of objective lens 3. By doing this, after the light that exits and disperses from light exit end part 7 out has advanced along the optical axis facing the linearly in relation to objective lens 3, the light advances by following along the optical axis which diffracts the light in direction passing through the focal point of the object to be observed side of objective lens 3, and it is possible to irradiate nearly all of the light within the range which can be observed by image guide 6, thus improving the light utilization efficiency. Also, because the end aperture part of pipe 2 in which image guide 6 and image light guide 7 is filled up by the objective lens, the end can be easily wiped clean even when dirtied with oil, etc.