Measurement of LED Spatial Intensity Distribution Using Imaging

Huan Bo Shen; Qing Guang Chen; Bin Lin

doi:10.4028/www.scientific.net/AMR.457-458.780

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 457-458Measurement of LED Spatial Intensity Distribution...

Measurement of LED Spatial Intensity Distribution Using Imaging

Abstract:

This paper, through studying of LED luminescence properties, presents a fast measurement method and device of LED sources spatial intensity distribution. This method is based on planar imaging, and it has significant merits of fast, easy operated, informative and real–time. The basic structure is LED luminous energy converges on image space through optical lens of a certain numerical aperture(NA). In image space, the energy on the defocused plane is collected with the imaging detector. Then, calculating energy distribution on object virtual plane from that on the image space defocused plane through imaging relationship. Thus, each point of the LED luminous intensity distribution on object virtual plane can be calculated. Tracepro simulation software is used to simulate energy distribution of the model, and the corresponding data analysis shows that planar imaging can accurately reflect the distribution of the LED light. This method has practical meanings for luminous flux measurement of some LEDs.

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Periodical:

Advanced Materials Research (Volumes 457-458)

Pages:

780-784

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.457-458.780

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Online since:

January 2012

Authors:

Huan Bo Shen, Qing Guang Chen, Bin Lin

Keywords:

LED, Light Energy, Planar Imaging, Spatial Light Intensity

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