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Microlens Array Homogenizer for Laser Illuminated Projector

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Abstract:

Laser light source is a potential illumination light source for non-emissive display applications, especially for liquid crystal projection displays, due to its requirement of low etendue source and highly polarized light. In order to make a conversion from a circular Gaussian beam profile to a rectangular uniform distribution, a microlens array has been proposed as a homogenizer. The analytical and experimental results show that the microlens array with a pitch of 100um under laser beam illumination works as a diffractive element, and a promising uniformity can be obtained with a stack of two microlens array.

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Periodical:

Key Engineering Materials (Volumes 364-366)

Pages:

143-147

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.364-366.143

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Online since:

December 2007

Authors:

Cheng Huan Chen, Chien Chuan Chen, Po Hung Yao

Keywords:

Laser Diode, Micro-Lens Array, Projection Display

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© 2008 Trans Tech Publications Ltd. All Rights Reserved

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