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Optical Engineering

Laser-diode collimating light sources using micro-Fresnel lenses
Author(s): Shiro Ogata; Yoshinori Ito
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Paper Abstract

Compact and low-cost laser-diode collimating light sources that employ a thin and mass-producible diffractive micro-Fresnel lens have been developed for optical information-processing equipment such as laser-beam printers. For the compensation of the defocusing of an output beam caused by temperature dependence of the laser-diode wavelength, engineering plastics with different thermal expansion coefficients are adopted for the components. The fabricated light source emits stably up to 60°C. The present laser light sources exhibit allowable optical characteristics for optical information-processing equipment as well as cost-efficient mass production.

Paper Details

Date Published: 1 November 1994
PDF: 6 pages
Opt. Eng. 33(11) doi: 10.1117/12.181173
Published in: Optical Engineering Volume 33, Issue 11
Show Author Affiliations
Shiro Ogata, Omron Corp. (Japan)
Yoshinori Ito, OMRON Corp. (Japan)


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