Speckle reduction mechanism in laser rear projection displays using a small moving diffuser

Yuhei Kuratomi, Kazuo Sekiya, Hiroaki Satoh, Tatsuhiro Tomiyama, Toru Kawakami, Baku Katagiri, Yoshito Suzuki, Tatsuo Suzuki

    Research output: Contribution to journalArticlepeer-review

    82 Citations (Scopus)

    Abstract

    Recently, a practical method of speckle reduction in laser rear projection displays that uses an optical system with a small moving diffuser has attracted much attention. In this paper, a model of the speckle generation and reduction mechanism in the system is presented. We investigated the speckle, focusing on the physical aspects of its generation, rather than treating it statistically. We found that the granularity of the speckle patterns generated by the small diffuser corresponded to the size of the coherent regions on the projection screen. This determined the efficiency of the speckle reduction when the small diffuser was rotated.

    Original languageEnglish
    Pages (from-to)1812-1817
    Number of pages6
    JournalJournal of the Optical Society of America A: Optics and Image Science, and Vision
    Volume27
    Issue number8
    DOIs
    Publication statusPublished - 2010 Aug 1

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Atomic and Molecular Physics, and Optics
    • Computer Vision and Pattern Recognition

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