Abstract
The design and testing of LED lamps are vital steps toward broader use of LED lighting for outdoor illumination and traffic signalling. The characteristics of LED sources, in combination with the need to limit light pollution and power consumption, require a precise optical design. In particular, in every step of the process, it is important to closely compare theoretical or simulated results with measured data (obtained from a prototype). This work examines the various possibilities for using an optical CAD (Lambda Research TracePro) to design and check a LED lamp for outdoor use. This analysis includes the simulations and testing on a prototype as an example; data acquired by measurement are inserted into the same simulation software, making it easy to compare theoretical and actual results.
Highlights
In order to better substitute traditional light sources with LED sources, lamp design must include a soundness phase, as traditional sources emit a radiation lobe of 4π steradian while white LED sources emit a radiation lobe of 2π steradian or less
Considering that the substitution process strongly depends both on costs and performance reliability, it has been clear for many years that the use of optical simulation software is indispensable, as it allows enhancement and refinement of the design activity [1]
This work highlights a method of designing and testing a streetlamp using optical CAD software, in particular looking for high illuminance uniformity values on the ground
Summary
In order to better substitute traditional light sources This work highlights a method of designing and testing a streetlamp using optical CAD (computer-aided design) software, in particular looking for high illuminance uniformity values on the ground. The methodology involves reverse raytracing starting from the resultant illumination in order to obtain information on the source design. Some studies have been performed in order to manufacture glass-molded lenses for streetlamps: H. The proposed method is applied to the design and testing of a streetlamp that could be utilized in different situations with few adjustments (such as the LED current or the component inclination), whose optical components are SMD (surface-mounted device) white LEDs and reflective parabolic surfaces. The constraints, requirements and optical design of the LED streetlamp have already been described in a previous work [6]
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