Device for preventing laser beam leakage
US5708745A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 5, 1995 |
| Grant date | Jan 13, 1998 |
| Priority date | — |
| Expiry date | Jul 5, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2006/4297
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A device for preventing laser beam leakage, which excludes a danger that a laser beam emitted from a laser source directly attacks eyes of an operator when an external connector is connected to or disconnected from an internal connector, aiming at being inexpensive and excellent in operability, and having a high safety. When the external connector has been removed from the optical transmission apparatus, a pair of movable shield plates are constantly urged in respective directions for closing a receiving opening of the apparatus to bring joining portions of the movable shield plates into close contact with each other, thereby preventing dust from entering the inside of the apparatus and the laser beam from being leaked. Further, a limit switch is provided, which stops delivering an ON signal to an E/O laser module when the external connector is pulled out of the optical transmission apparatus, whereby the E/O laser beam stops supply of the laser beam, thereby bringing into effect a perfect measure for protection of the eyes of the operation from the laser beam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.