Radiant energy – Photocells; circuits and apparatus – With circuit for evaluating a web – strand – strip – or sheet
Patent
1995-10-10
1999-07-13
Le, Que T.
Radiant energy
Photocells; circuits and apparatus
With circuit for evaluating a web, strand, strip, or sheet
250235, 358487, 358497, H04N 104
Patent
active
059230428
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.
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Mietta Andrea
Simmarano Roberto
Beckstrand Shelley M
International Business Machines - Corporation
Le Que T.
Lee John R.
Seaman Kenneth A.
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