Optical module and methods for optically aligning and assembling the same
US7271402B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 26, 2007 |
| Grant date | Sep 18, 2007 |
| Priority date | — |
| Expiry date | Mar 26, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/02487
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical alignment method is for an optical module including a housing unit, a light-sensing unit, and a lens unit. The method includes: (a) through image-capturing techniques, finding a light-sensing component of the light-sensing unit and a predetermined reference point, and determining an actual total optical path length between the light-sensing component and an object position; (b) subtracting a correction distance from the actual total optical path length to obtain a corrected total optical path length; (c) finding a first center line that divides the corrected total optical path length in half; (d) through image-capturing techniques, finding opposite first and second edges of the lens unit, and determining a lens length between the first and second edges; (e) finding a second center line that divides the lens length in half; and (f) assembling the lens unit to the housing unit such that the first and second center lines overlap.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.