Designing and Fabrication of a New Lighting System Using Light Sources with Collimated Beams and a Diffuser-Reflector System

Document Type : Original Article

Authors

1 Department of Photonics, Faculty and Research Institute of Basic Science, Imam Hossein Comprehensive University, Tehran, Iran

2 faculty of passive defense/imam hossien university/tehran/iran

Abstract

Humans have always sought a solution to overcome the phenomenon of darkness and produce light in dark or low light environments. They have overcome this problem by inventing a variety of lights and lamps. In current lighting systems, the lighting source is located in the ceiling, which has advantages such as a relatively uniform distribution of light intensity in the entire environment centered on the location of the source and, of course, disadvantages such as the need for wiring in the ceiling. In places such as tunnels, buildings with high ceilings, very high arches, and such things, in addition to the high cost of wiring in the roof, if there is a need to repair or replace the lighting source, in addition to the great difficulty and risks, an additional fee should be considered for this purpose. In addition, the absence of a wire carrying electricity in the ceiling is one of the requirements in some places. In order to increase the safety of people and equipment and significantly reduce the cost, as well as not using the wire carrying electricity in the roof of some tunnels or buildings in order to comply with the principles of passive defense, a new lighting system has been proposed that uses LED light sources as lighting sources. The use of a collimated optical element, along with the use of a  reflector-diffuser system, in addition to removing the electricity transmission wire from the ceiling and the possibility of easy repair or replacement of the light source, also provide the required lighting for that place. The results of the experimental setup conducted using two different geometries for the reflector-diffuser system indicate that the use of the proposed method not only does not reduce the measurement lux of the light scattered in the environment but also increases the brightness to a small value.

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History

  • Receive Date: 18 January 2023
  • Revise Date: 08 April 2023
  • Accept Date: 10 May 2023

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