High numerical aperture objective lens manufacturable in wafer form
US6049430A · kind A · utility
23Cited by
2References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 12, 1998 |
| Grant date | Apr 11, 2000 |
| Priority date | — |
| Expiry date | Nov 12, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2007/13727
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A composite micro-lens for use in an optical or magneto-optical information storage system, made up of one or more lens elements which, when coupled in assembly, provide a desired numerical aperture. The design may provide, if necessary, a photo resist lens, a shaped ball lens, or one or more contoured surfaces within the composite construction to correct for aberrations. The composite lens designed in this manner allowing for the use of wafer-level assembly processes to provide high volume production capabilities. It is further intended that this micro-lens design support integration in an optical or magneto-optical head design.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.