System analysis of bar code laser scanner

Jianpu Wang; Zhaofeng Chen; Zukang Lu

doi:10.1117/12.253012

3 October 1996 System analysis of bar code laser scanner

Jianpu Wang, Zhaofeng Chen, Zukang Lu

Proceedings Volume 2899, Automated Optical Inspection for Industry; (1996) https://doi.org/10.1117/12.253012
Event: Photonics China '96, 1996, Beijing, China

Abstract

This paper focuses on realizing the three important aspects of bar code scanner: generating a high quality scanning light beam, acquiring a fairly even distribution characteristic of light collection, achieving a low signal dynamic range over a large depth of field. To do this, we analyze the spatial distribution and propagation characteristics of scanning laser beam, the vignetting characteristic of optical collection system and their respective optimal design; propose a novel optical automatic gain control method to attain a constant collection over a large working depth.

Citation Download Citation

Jianpu Wang, Zhaofeng Chen, and Zukang Lu "System analysis of bar code laser scanner", Proc. SPIE 2899, Automated Optical Inspection for Industry, (3 October 1996); https://doi.org/10.1117/12.253012

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