Uneven-surface data detection apparatus
US4728186A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 27, 1986 |
| Grant date | Mar 1, 1988 |
| Priority date | — |
| Expiry date | Feb 27, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/3522
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An uneven-surface data detection apparatus, includes a transparent plate having an uneven-surface contact portion against which an uneven surface to be detected is pressed. A light source illuminates the uneven-surface contact portion through the transparent plate. An uneven-surface image drawing out optical element draws out the light reflected on the uneven-surface contact portion of the transparent plate. A detector detects the light drawn out from the transparent plate by the optical element. Light reflected by a projection-facing portion of the uneven surface contact portion to be introduced into the detector diverges from a propagation direction of light reflected by a recess-facing portion of the uneven surface contact portion. The optical element is arranged to guide the light reflected by the projection-facing portion into the detector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.