Abstract

This paper investigates a method to remove hot spot speckle,which is produced by laser-long coherence, on a projection screen. The objective of the work has been to first create an image from a digital light processing (DLP) display system using an RGB laser source. We then successfully obtained a high-quality image with speckle contrast, which is less than 2% when the screen was rotated by piezoelectric motor.

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  1. F. S. MacAdam and Taylor, British Patent 592 815, 1947.
  2. T. Iwai and T. Asakura, "Speckle reduction in coherent information processing", Proc. IEEE, vol. 84, pp. 765-781, 1996.
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  4. C. A. Thompson, K. J. Webb and A. M. Weiner, "Diffusive media characterization with laser speckle", Appl. Opt., vol. 36, no. 16, pp. 3726 -3734, 1997.
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  7. L. Wang, T. Tschudi, T. Halldorsson and P. R. Retursson, "Speckle reduction in laser projection systems by diffractive optical elements", Appl. Opt., vol. 37, no. 10, pp. 1770-1775, 1998.

Other (7)

F. S. MacAdam and Taylor, British Patent 592 815, 1947.

T. Iwai and T. Asakura, "Speckle reduction in coherent information processing", Proc. IEEE, vol. 84, pp. 765-781, 1996.

K.-I. Sato and K. Asatani, "Speckle noise reduction in fiber optic analog video transmission using semiconductor laser diodes", IEEE Trans. Commun. , vol. COM-29, pp. 1017-1024, 1981.

C. A. Thompson, K. J. Webb and A. M. Weiner, "Diffusive media characterization with laser speckle", Appl. Opt., vol. 36, no. 16, pp. 3726 -3734, 1997.

L. Wang, T. Tschudi, T. Halldorsson and P. R. Retursson, "Speckle reduction in laser projections with ultrasonic waves", Opt. Eng., vol. 39, no. 6, pp. 1659-1664, 2000 .

E. G. Rawson and A. B. Nafarrate, "Speckle-free rear-projection screen using two close screens in slow relative motion", J. Opt. Soc. Amer., vol. 66, no. 11, pp. 1290-1294, 1976.

L. Wang, T. Tschudi, T. Halldorsson and P. R. Retursson, "Speckle reduction in laser projection systems by diffractive optical elements", Appl. Opt., vol. 37, no. 10, pp. 1770-1775, 1998.

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