Optical element, head-up display and light source unit
US9042021B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 14, 2011 |
| Grant date | May 26, 2015 |
| Priority date | — |
| Expiry date | Apr 14, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2027/0118
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical element includes a first microlens array unit and a second microlens array unit in each of which a plurality of microlenses are arranged. The first and second microlens array units are arranged opposite to each other with a distance which is longer than a focal length of the microlenses arranged in the first microlens array unit. The first microlens unit is arranged on a light-incident side with respect to the second microlens array unit. The interval between the microlenses arranged in the second microlens array unit is narrower than the interval between the microlenses arranged in the first microlens array unit. The optical element can appropriately suppress the occurrence of excessive pixel bright spot.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.