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Novel Optical Scanner Using Photodiodes Array for Two-Dimensional Measurement of Light Flux Distribution

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2 Author(s)
Chong, K.K. ; Fac. of Eng. & Sci., Univ. Tunku Abdul Rahman, Kuala Lumpur, Malaysia ; Yew, T.K.

An optical scanner, also known as a flux mapping system, capable of acquiring a flux distribution pattern of a light source on a 2-D flat surface, has been designed and constructed. The novel optical scanner can measure the light flux distribution at high resolution with fewer sensors in a relatively short amount of time, and it can be used for precise calibration of any light source. The design of the optical scanner consisted of a single row of photodiodes with fixed distances that can scan and acquire flux distribution data in the 2-D measurement plane. In our prototype design of the novel optical scanner, 25 photodiodes with a photosensitive area of 1 cm2 each were arranged in a single row and fixed to an aluminum holder. The resulting scanner was fast enough to perform scanning and recording of light irradiance over a test plane area of 1125 cm2 within a period of 5 s.

Published in:

Instrumentation and Measurement, IEEE Transactions on  (Volume:60 ,  Issue: 8 )

Date of Publication:

Aug. 2011

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