Optical scanning lens, optical scanning and imaging system and optical scanning apparatus incorporating same
US6081386A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 15, 1998 |
| Grant date | Jun 27, 2000 |
| Priority date | — |
| Expiry date | Apr 15, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B13/0005
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical scanning lens and an optical scanning and imaging system for use in an optical scanning apparatus for scanning a surface of an optical recording medium, such as a photosensitive material, for writing data thereupon, is constructed to produce a minimum beam spot diameter, in a sub-scanning direction, within a desired range, while also reducing variation in a scanning line pitch and reducing variation in beam spot diameter according to an image height for every point along a scanning surface by determining and compensating for a non-uniform distribution of refractive indices in an optical scanning lens used in the optical scanning imaging system, before designing and manufacturing the optical scanning lens.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.