Beam protecting device
US5991102A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 27, 1995 |
| Grant date | Nov 23, 1999 |
| Priority date | — |
| Expiry date | Nov 27, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/0972
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A beam projecting apparatus which includes a light source emitting a laser beam; and a beam projecting device which includes a beam projecting portion from which the laser beam is projected outwardly so that the laser beam has a beam waist position at a predetermined position apart from the beam projecting apparatus. The beam projecting apparatus further includes a beam waist position adjusting optical system which is disposed along a light path from the light source to the beam projecting portion, at least one lens element of the beam waist position adjusting optical system being movable along an optical axis thereof; a temperature detecting device for detecting a temperature in the beam projecting apparatus; and a controller for controlling a movement of the at least one lens element in association with the temperature detected by the temperature detecting device so that a deviation of the beam waist position from the predetermined position due to a temperature change is minimized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.