Erecting equal-magnification lens array plate, optical scanning unit, image reading device, and image writing device
US8638484B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 6, 2012 |
| Grant date | Jan 28, 2014 |
| Priority date | — |
| Expiry date | Jul 19, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/0018
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An erecting equal-magnification lens array plate includes: a first lens array plate provided with a plurality of first lenses arranged on a first surface and a plurality of second lenses arranged on a second surface; and a second lens array plate provided with a plurality of third lenses arranged on a third surface and a plurality of fourth lenses arranged on a fourth surface. The first and second lens array plates are stacked. An intermediate light-shielding member provided with a plurality of intermediate through holes is between the first lens array plate and the second lens array plate. The intermediate through hole is formed such that the hole diameter is progressively smaller in a tapered fashion away from the second surface toward the third surface. A plurality of V grooves are formed in an area between adjacent second lenses on the second surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.