Media for enhanced optical auto-focus performance and methods for using same
US6806451B2 · kind B2 · utility
0Cited by
4References
28Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 18, 2002 |
| Grant date | Oct 19, 2004 |
| Priority date | — |
| Expiry date | May 1, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03F9/00
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A multi-layer imaging medium has a layer that absorbs radiation at a wavelength used by an optical auto-focus system. Spurious reflections are suppressed. The layer transmits radiation at a wavelength used to image the medium. The layer may function as a support layer for the medium. Thermal imaging media may be made according to the invention.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.