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Proceedings Paper

Laser scanning graphic input system
Author(s): John L. Junkins; Jagmohan S. Gadhok
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Paper Abstract

A novel method for digitization of hand-written and hand-drawn information is presented. Two or more resonant laser scanners sweep out a plane, the interruption of these laser beams by a hand-held stylus and the beams' angular positions are detected. These data can be used to digitize coordinates along the hand-drawn lines with high precision (approximately 1 part in 10,000) and digitization rates (> 150 HZ). The data input surface can vary from small to large (permitting digitization on wall-sized writing surfaces), thus enabling a new family of applications. We discuss a novel application of this laser digitizing system, in conjunction with emerging radio modem and pen-computer technology, to the automation of class or conference room note-taking.

Paper Details

Date Published: 29 December 1993
PDF: 12 pages
Proc. SPIE 1987, Recording Systems: High-Resolution Cameras and Recording Devices and Laser Scanning and Recording Systems, (29 December 1993); doi: 10.1117/12.165199
Show Author Affiliations
John L. Junkins, Texas A&M Univ. (United States)
Jagmohan S. Gadhok, Laser Scanning Products, Inc. (United States)


Published in SPIE Proceedings Vol. 1987:
Recording Systems: High-Resolution Cameras and Recording Devices and Laser Scanning and Recording Systems
Leo Beiser; Reimar K. Lenz, Editor(s)

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