Projection lens and optical engine
US9013798B2 · kind B2 · utility
0Cited by
6References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 27, 2013 |
| Grant date | Apr 21, 2015 |
| Priority date | — |
| Expiry date | Sep 27, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B13/16
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A projection lens disposed between an enlarged side and a reduced side is provided. The projection lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens, which are sequentially arranged from the enlarged side to the reduced side. Refractive powers of the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens are respectively negative, positive, positive, negative, positive and positive. A focal length of the third lens is greater than or equal to 20 mm and is less than or equal to 200 mm. An optical engine is also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.