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Proceedings Paper

Rectangular prototype to determine the irradiance pattern produced by directive sources
Author(s): J. Escobedo-Alatorre; M. Tecpoyotl-Torres; J. G. Vera-Dimas; J. Sánchez Mondragón; M. Torres Cisneros
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Paper Abstract

In order to determine the irradiance profile of a directive source on a plane XY, we present an arrangement of geometry similar to conventional scanners. It is formed by two vertical bases of a mobile rail. On this rail, a photodetector is located, making it able to move from right to left, covering a mesh of 14x15 detection points. The XY movements of the setup are determined by servo motors, which determine the resolution, but considering the interest of researchers in this area, and the feasibility to use a table XY for the scanning, we implement its use as a part of this meter. The detector is located at the corner of the mobile section. The height of the light source under test is located at the central part of the described area. The utilization of only one photo-detector was decided with the purpose of a higher homogeneity of the irradiance measurements. The detector must have high stability and low noise. The resolution XY is determined by the movements on the axes of a length determined by the DSPIC programming. The use of this device instead of commercial hardware for data acquisition contributes to the low costs of the prototype. It was realized all the necessary tests for the generation of reliable information, establishing the time needed to achieve the stability of the system, as well as the levels of noise due to the presence of the detector and of the electronic elements. This prototype has a very simple geometry and relatively low cost. It constitutes a good option to determine the irradiance profile of directive sources.

Paper Details

Date Published: 4 August 2009
PDF: 8 pages
Proc. SPIE 7386, Photonics North 2009, 73861R (4 August 2009); doi: 10.1117/12.839793
Show Author Affiliations
J. Escobedo-Alatorre, Univ. Autónoma del Estado de Morelos (Mexico)
M. Tecpoyotl-Torres, Univ. Autónoma del Estado de Morelos (Mexico)
J. G. Vera-Dimas, Univ. Autónoma del Estado de Morelos (Mexico)
J. Sánchez Mondragón, Instituto Nacional de Astrofísica, Óptica y Electrónica (Mexico)
M. Torres Cisneros, Univ. de Guanajuato (Mexico)


Published in SPIE Proceedings Vol. 7386:
Photonics North 2009
Réal Vallée, Editor(s)

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