Optical System Design For High Speed Bar Code Scanning

Ronald Hellekson; Brad Reddersen; Scott Campbell

doi:10.1117/12.939745

10 April 1987 Optical System Design For High Speed Bar Code Scanning

Ronald Hellekson, Brad Reddersen, Scott Campbell

Proceedings Volume 0741, Design of Optical Systems Incorporating Low Power Lasers; (1987) https://doi.org/10.1117/12.939745
Event: OE LASE'87 and EO Imaging Symposium, 1987, Los Angeles, CA, United States

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.

Citation Download Citation

Ronald Hellekson, Brad Reddersen, and Scott Campbell "Optical System Design For High Speed Bar Code Scanning", Proc. SPIE 0741, Design of Optical Systems Incorporating Low Power Lasers, (10 April 1987); https://doi.org/10.1117/12.939745

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