Beam projecting device
US5978148A · kind A · utility
15Cited by
18References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 9, 1998 |
| Grant date | Nov 2, 1999 |
| Priority date | — |
| Expiry date | Dec 9, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/0972
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A beam projecting apparatus includes a light source that emits a laser beam and a colliminating lens that renders the emitted laser beam a substantially parallel beam. A beam projecting device includes a beam projecting portion from which the laser beam is projected outwardly so that the laser beam has a beam waist located at a predetermined position spaced from the beam projecting apparatus. The beam projecting apparatus further includes a system that detects a curvature of wavefront of the substantially parallel beam at the predetermined position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.