Projection lens assembly
US7167316B1 · kind B1 · utility
2Cited by
5References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 29, 2005 |
| Grant date | Jan 23, 2007 |
| Priority date | — |
| Expiry date | Jul 29, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B21/14
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A projection lens assembly is provided that includes first, second, third, fourth, fifth, and sixth lenses. The second, third, fifth, and sixth lenses of the projection lens assembly form a double gauss-type lens assembly. The first lens is configured to provide telecentricity and the fourth lens in configured to correct aberrations due to variations in the third lens.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.