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Proceedings Paper

Optical System Design For High Speed Bar Code Scanning
Author(s): Ronald Hellekson; Brad Reddersen; Scott Campbell
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Paper Abstract

Spectra-Physics recently introduced the Model 750 SL scanner for use in the European point-of-sale market, to meet the European requirement for a scanner of less than 13 cm height. The model 750 SL uses a higher density computer designed scan pattern with a retrodirective collection system to scan and detect UPC, EAN, and JAN bar codes. The scanner "reads" these bar codes in such a way that the user need not precisely align the bar code symbol with respect to the window in the scanner even at package speeds up to 100 inches per second. By using a unique geometrical arrangement of mirrors, a polygonal mirror assembly, and a custom-designed plastic bifocal lens, a design was developed to meet these requirements. This paper describes the design of this new low cost scanner, the use of computer-aided design in the development of this scanner, and some observations on the future of bar code scanning.

Paper Details

Date Published: 10 April 1987
PDF: 14 pages
Proc. SPIE 0741, Design of Optical Systems Incorporating Low Power Lasers, (10 April 1987); doi: 10.1117/12.939745
Show Author Affiliations
Ronald Hellekson, Spectra-Physics Retail Systems (United States)
Brad Reddersen, Spectra-Physics Retail Systems (United States)
Scott Campbell, Spectra-Physics Retail Systems (United States)

Published in SPIE Proceedings Vol. 0741:
Design of Optical Systems Incorporating Low Power Lasers
Donald C. O'Shea, Editor(s)

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