Laser beam shaping methods can be applied to a host of other sources of light.  LEDs have a substantial future in home, commercial and automotive lighting applications.  This section is dedicated to this emerging field, so that visitors who might be looking into beam shaping technology can view examples of how laser beam shaping technology and methods can be applied to high volume LED market.

 

Radiometry of flashing LED sources 

Paper 7062-49  
Author(s): Don A. Gregory, Stephanie Medley, Adam Roberts, The Univ. of Alabama in Huntsville

Abstract

A new measurement scheme must be devised to measure the illumination characteristics of flashing light emitting diode (LED) sources. The difference between measuring a continuous source and a flashing source is that some factor must be incorporated into the measurement to account for the response of the eye. In this research, a modified Allard method has been updated using a silicon detector in conjunction with a digital multi-meter and Labview software to make this measurement

Beam shaping of line generators based on high power diode lasers to achieve high intensity and uniformity levels 

Paper 7062-33  
Author(s): Andreas Bayer, Thomas Mitra, Lutz Aschke, LIMO-Lissotschenko Mikrooptik GmbH (Germany)

 
Abstract

We present a variable beam shaping concept for line generators based on high power diode lasers. This concept fulfils the requirements to enter new application fields like annealing, hardening and metallization of different materials: the power content along the narrow axis of the line, namely the peak intensity in combination with the beam shape, and the intensity homogeneity along the long axis. We show methods and outcomes to reduce inhomogeneities caused by diffraction effects and effects based on geometric optics.
We achieved a 13mm long and <100µm wide laser line with a peak intensity >100kW/cm² and uniformity >97%.