Partial color-corrected projection lens system
US6297860A · kind A · utility
89Cited by
10References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 27, 1998 |
| Grant date | Oct 2, 2001 |
| Priority date | — |
| Expiry date | Oct 27, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B13/16
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Projection lens systems (13) for use in projection televisions are provided. The systems are characterized by a screen side lens unit (U1) which: (1) has a weak optical power; (2) has a negative, aspherical lens element composed of a high dispersion material; and (3) has a positive lens element which is composed of a low dispersion material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.