Safety device for detecting trouble in optical transmission fibers
US4543477A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 21, 1983 |
| Grant date | Sep 24, 1985 |
| Priority date | — |
| Expiry date | Mar 21, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2006/4297
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A safety device for detecting troubles in an optical transmission fiber of a medical laser application to prevent accidents characterized by using either a laser light reflector from the exit end surface of the fiber or a secondary light. When trouble is detected, the safety device operates a mechanism for interrupting the coupling of a beam of laser light into the transmission fiber. The safety device includes an electrical circuit which allows appropriate use of the apparatus with the tip of the fiber in water or a physiological salt solution for treatment of a tumor in a urinary bladder. The electrical circuits will include amplifiers, comparators and logic circuits.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.