Advanced Q-switched DPSS lasers for ID-card marking

Michael Hertwig; Martin Paster; Ralf Terbrueggen

doi:10.1117/12.769552

14 February 2008 Advanced Q-switched DPSS lasers for ID-card marking

Michael Hertwig, Martin Paster, Ralf Terbrueggen

Proceedings Volume 6871, Solid State Lasers XVII: Technology and Devices; 687126 (2008) https://doi.org/10.1117/12.769552
Event: Lasers and Applications in Science and Engineering, 2008, San Jose, California, United States

Abstract

Increased homeland security concerns across the world have generated a strong demand for forgery-proof ID documents. Manufacturers currently employ a variety of high technology techniques to produce documents that are difficult to copy. However, production costs and lead times are still a concern when considering any possible manufacturing technology. Laser marking has already emerged as an important tool in the manufacturer's arsenal, and is currently being utilized to produce a variety of documents, such as plastic ID cards, drivers' licenses, health insurance cards and passports. The marks utilized can range from simple barcodes and text to high resolution, true grayscale images. The technical challenges posed by these marking tasks include delivering adequate mark legibility, minimizing substrate burning or charring, accurately reproducing grayscale data, and supporting the required process throughput. This article covers the advantages and basic requirements on laser marking of cards and reviews how laser output parameters affect marking quality, speed and overall process economics.

Citation Download Citation

Michael Hertwig, Martin Paster, and Ralf Terbrueggen "Advanced Q-switched DPSS lasers for ID-card marking", Proc. SPIE 6871, Solid State Lasers XVII: Technology and Devices, 687126 (14 February 2008); https://doi.org/10.1117/12.769552

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KEYWORDS

Laser marking

Pulsed laser operation

Diode pumped solid state lasers

Modulation

Laser processing

Manufacturing

Raster graphics

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