Versatile method for achieving 1% speckle contrast in large-venue laser projection displays using a stationary multimode optical fiber

We propose a method based on quantitative theoretical analysis for achieving speckle contrast of 1% or less in images created by a full-frame laser projection display system. The method employs a stationary multimode optical fiber to achieve the effect of using a rapidly moving diffuser, but without...

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Bibliographic Details
Published inOptics express Vol. 20; no. 10; pp. 11288 - 11315
Main Authors Manni, Jeffrey G, Goodman, Joseph W
Format Journal Article
LanguageEnglish
Published United States 07.05.2012
Subjects
Algorithms
Equipment Design
Fourier Analysis
Lasers
Light
Models, Statistical
Models, Theoretical
Normal Distribution
Optical Fibers
Optics and Photonics
Semiconductors
Ultraviolet Rays
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Summary:We propose a method based on quantitative theoretical analysis for achieving speckle contrast of 1% or less in images created by a full-frame laser projection display system. The method employs a stationary multimode optical fiber to achieve the effect of using a rapidly moving diffuser, but without moving the fiber or any other system component. When a suitably large projector lens is used, low-speckle illumination light delivered through the fiber acts in conjunction with wavelength diversity at the projection screen to achieve speckle contrast of 1% in viewed images. We describe in detail how the proposed method might be used with most types of high-power visible lasers being considered for large-venue displays. When used with visible laser diodes, the method may also be suitable for use in laser-based television.
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ISSN:1094-4087
1094-4087
DOI:10.1364/oe.20.011288