Optical image-reading apparatus
US4652743A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 27, 1985 |
| Grant date | Mar 24, 1987 |
| Priority date | — |
| Expiry date | Nov 27, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/192
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical reader with a reading head including first optical fibers for transmitting light beams from an emitter to emit light beams from their first ends to irradiate corresponding illumination spots on a medium, and further including second optical fibers having first ends which are located adjacent to the first ends of the respective first optical fibers and which receive the beams reflected from corresponding reflection spots on the medium, for transmitting the reflected beams to a light-sensitive device. The first and second optical fibers constitute plural reading units, and their first ends constitute their image-reading portions. The light-sensitive device produces a signal indicating a light reflectance in an overlapping spot where the illumination spot overlaps the reflection spot. The image-reading portions are spaced apart at a pitch sufficient to prevent the illumination spot of one of the reading units from overlapping the reflection spot of the adjacent reading unit. The reading head and the medium are moved relative to each other to move the overlapping spot to read the images on the medium. The light emitter and light-sensitive device are controlled so as to read …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.