Device for assembling and adjusting an optical unit
US6728185B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 19, 2001 |
| Grant date | Apr 27, 2004 |
| Priority date | — |
| Expiry date | Apr 13, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2007/0006
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A device for assembling and adjusting an optical unit of the present invention includes an adjusting device including a collimator lens, an object lens, a disk, and a signal sensing system. A light beam output from the optical unit is incident to the collimator lens. Parallel rays output from the collimator lens are incident to the object leans. Further, a spot converged by the object lens is incident to the disk. The signal sensing system receives a light beam reflected by the disk via the object lens to thereby determine a distance between the object lens and the disk and a positional relation between the spot on the disk and the groove of the disk. The device allows the position of a light emitting element to be accurately determined and therefore allows the angular deviation of the intensity distribution of the light emitting element from a designed value to be easily grasped.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.