Method and apparatus for optically scanning transparent media
US5923042A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 10, 1995 |
| Grant date | Jul 13, 1999 |
| Priority date | — |
| Expiry date | Oct 10, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/0404
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical scanner device is provided in PCMCIA format for transparent image bearing media (slides or film). The light sensor (420) includes a single photosensitive element, a photodiode, close to the media (415) being scanned; the sensor (420) and the media (415) are relatively movable one in respect of the other in at least two directions, successively acquiring data representing each pixel one at a time. The source light (405) is implemented as a small block of four LEDs (red, green, blue and infrared), including a plexiglass diffuser (410), and it is moved concurrently with the sensor (420). The sensor (420) and the light source (405) can be moved at different selected speeds, providing a scanner with different selectable resolutions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.