Microlens array homogenizer for laser illuminated projector

Cheng-Huan Chen*, Chien Chuan Chen, Po Hung Yao

*Corresponding author for this work

Research output: Contribution to journalArticle

1 Scopus citations

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.

Original languageEnglish
Pages (from-to)143-147
Number of pages5
JournalKey Engineering Materials
Volume364-366 I
DOIs
StatePublished - 11 Feb 2008

Keywords

  • Laser diode
  • Microlens array
  • Projection display

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