Bore scope
US5986752A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 19, 1997 |
| Grant date | Nov 16, 1999 |
| Priority date | — |
| Expiry date | Sep 19, 2017 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B1/002
- WIPO fieldOptics
- WIPO sectorInstruments
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 e…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.