Humidity tolerant scan lens
US6807011B2 · kind B2 · utility
2Cited by
3References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 16, 2003 |
| Grant date | Oct 19, 2004 |
| Priority date | — |
| Expiry date | Apr 30, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B3/02
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A lens has a body (1), reinforcing extensions (3a, 3b) and a clear aperture (9) surrounded on top and bottom by lens body. The lens is suitable for spot scanning. The lens is made of a water absorbing material, such as most polymers, particularly acrylate polymers. Aluminum sheets as vapor barriers are attached on each side of the lens body. This results in excellent resistance to change or distortion in high humidity environments.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.