Beam shaper device for optical read/write heads
US5715102A · kind A · utility
1Cited by
7References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 3, 1997 |
| Grant date | Feb 3, 1998 |
| Priority date | — |
| Expiry date | Jan 3, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/1398
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A beam shaper device for an optical read/write head on an optical disc drive is provided. This beam shaper device is particularly useful for shaping a laser beam originally emitted with an elliptical cross section, into having a substantially circular cross section. The beam shaper device includes only one prism and one plane mirror. The shape of the prism and the orientation of the plane mirror are specifically devised in such a way as to allow the output beam shaper device to have a circular cross section and to have its propagation axis orthogonal to that of the input laser beam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.