Aberration and defocusing effects in the mechanism of speckle suppression in laser projection displays were studied using the Fresnel approximation and the thin lens model. The analysis was performed with the assumption that aberrations change only the phase (and not the amplitude) in the rear principal plane of the display projection system. The analysis showed that aberrations should not have any influence on speckle contrast. It also showed that a screen shift relative to the image plane (defocusing) results only in a rescaling of the scanning beam autocorrelation function, which is equivalent to refocusing the objective lens to a new position of the screen. The optimal beam shape for optimal speckle suppression was also studied. A homogeneous field intensity distribution in the spatial frequency domain was found to provide close to the best speckle suppression.

© 2008 Optical Society of America

1. D. M. Bloom, “Grating light valve: revolutionizing display technology,” Proc. SPIE 3013, 165-171 (1997). [CrossRef]
2. M. W. Kowarz and J. G. Phalen, “High-contrast display system with scanned conformal grating device,” U.S. patent 6,678,085 (13 January 2004).
3. S. Yun, “Open hole-based diffractive light modulator,” U.S. patent 7,206,118 (17 April 2007).
4. S. K. Yun, J. H. Song, I. J. Yeo, Y. J. Choi, V. I. Yurlov, S. D. An, H. W. Park, H. S. Yang, Y. G. Lee, K. B. Han, I. Shyshkin, A. S. Lapchuk, K. Y. Oh, S. W. Ryu, J. W. Jang, C. S. Park, C. G. Kim, S. K. Kim, E. J. Kim, K. S. Woo, J. S. Yang, E. J. Kim, J. H. Kim, S. H. Byun, S. W. Lee, O. K. Lim, J. P. Cheong, Y. N. Hwang, G. Y. Byun, J. H. Kyoung, S. K. Yoon, J. K. Lee, T. W. Lee, S. K. Hong, Y. S. Hong, D. H. Park, J. C. Kang, W. C. Shin, S. I. Lee, S. K. Oh, B. K. Song, H. Y. Kim, C. M. Koh, Y. H. Ryu, H. K. Lee, and Y. K. Raek, “Spatial optical modulator (SOM): high density diffractive laser projection display,” Proc. SPIE 6487, 648710 (2007). [CrossRef]
5. S. Yun, J. H. Song, S. D. An, I. J. Yeo, Y. J. Choi, Y. G. Lee, H. W. Park, K. B. Han, H. S. Yang, V. Yurlov, I. Shyshkin, A. Lapchuk, H. Y. Kim, J. W. Jang, J. H. Kyoung, J. S. Yang, S. K. Yoon, C. S. Park, J. P. Cheong, Y. N. Hwang, K. S. Woo, S. W. Ryu, S. W. Lee, C. M. Koh, Y. K. Baek, D. H. Bae, H. K. Lee, J. H. Lee, Y. H. Ryu, H. Y. Hwang, C. M. Yang, O. K. Lim, D. H. Park, S. H. An, J. H. Bae, S. M. Cho, B. S. Go, S. K. Hong, H. P. Jung, S. J. Kim, K. U. Lee, J. H. Park, J. H. Yang, G. Y. Byun, S. H. Byun, Y. J. Cho, C. G. Kim, J. H. Kim, S. K. Kim, S. I. Lee, W. H. Lee, K. Y. Oh, S. K. Oh, W. C. Shin, B. K. Song, and E. M. Bourim, “A novel diffractive micro-optical modulator for mobile display applications,” Proc. SPIE 6887, 688702 (2008). [CrossRef]
6. J. W. Goodman, Speckle Phenomena in Optics (Roberts and Co., 2006).
7. E. Marom, S. Kresic-Juric, and L. Bergstein, “Analysis of speckle noise in bar-code scanning systems,” J. Opt. Soc. Am. A 18, 888-901 (2001). [CrossRef]
8. P. K. Murphy, J. P. Allebach, and N. C. Gallagher, “Effect of optical aberrations on laser speckle,” J. Opt. Soc. Am. A 3, 215-222 (1986). [CrossRef]
9. V. Yurlov, A. Lapchuk, S-K. Yun, J-H. Song, and H-S. Yang, “Speckle suppression in scanning laser display,” Appl. Opt. 47, 179-187 (2008). [CrossRef] [PubMed]
10. V. Yurlov, A. Lapchuk, and J-H. Song, “Optical modulator and optical modulator module for reducing laser speckle,” U.S. patent application 20080055698 (6 March 2008).
11. J. I. Trisnadi, “Method and apparatus for reducing laser speckle,” U.S. patent 6,323,984 (27 November 2001).
12. A. Papoulis, Systems and Transforms with Applications in Optics (McGraw-Hill, 1968).
13. W. Ritz, “Über eine neue Methode zur Lösung gewisser Variationsprobleme der mathematischen Physik,” J. Reine Angew. Math. 135, 1-61 (1908).

Appl. Opt.

• V. Yurlov, A. Lapchuk, S-K. Yun, J-H. Song, and H-S. Yang, “Speckle suppression in scanning laser display,” Appl. Opt. 47, 179-187 (2008). [CrossRef] [PubMed]

J. Opt. Soc. Am. A

• E. Marom, S. Kresic-Juric, and L. Bergstein, “Analysis of speckle noise in bar-code scanning systems,” J. Opt. Soc. Am. A 18, 888-901 (2001). [CrossRef]
• P. K. Murphy, J. P. Allebach, and N. C. Gallagher, “Effect of optical aberrations on laser speckle,” J. Opt. Soc. Am. A 3, 215-222 (1986). [CrossRef]

J. Reine Angew. Math.

• W. Ritz, “Über eine neue Methode zur Lösung gewisser Variationsprobleme der mathematischen Physik,” J. Reine Angew. Math. 135, 1-61 (1908).

Proc. SPIE

• D. M. Bloom, “Grating light valve: revolutionizing display technology,” Proc. SPIE 3013, 165-171 (1997). [CrossRef]
• S. K. Yun, J. H. Song, I. J. Yeo, Y. J. Choi, V. I. Yurlov, S. D. An, H. W. Park, H. S. Yang, Y. G. Lee, K. B. Han, I. Shyshkin, A. S. Lapchuk, K. Y. Oh, S. W. Ryu, J. W. Jang, C. S. Park, C. G. Kim, S. K. Kim, E. J. Kim, K. S. Woo, J. S. Yang, E. J. Kim, J. H. Kim, S. H. Byun, S. W. Lee, O. K. Lim, J. P. Cheong, Y. N. Hwang, G. Y. Byun, J. H. Kyoung, S. K. Yoon, J. K. Lee, T. W. Lee, S. K. Hong, Y. S. Hong, D. H. Park, J. C. Kang, W. C. Shin, S. I. Lee, S. K. Oh, B. K. Song, H. Y. Kim, C. M. Koh, Y. H. Ryu, H. K. Lee, and Y. K. Raek, “Spatial optical modulator (SOM): high density diffractive laser projection display,” Proc. SPIE 6487, 648710 (2007). [CrossRef]
• S. Yun, J. H. Song, S. D. An, I. J. Yeo, Y. J. Choi, Y. G. Lee, H. W. Park, K. B. Han, H. S. Yang, V. Yurlov, I. Shyshkin, A. Lapchuk, H. Y. Kim, J. W. Jang, J. H. Kyoung, J. S. Yang, S. K. Yoon, C. S. Park, J. P. Cheong, Y. N. Hwang, K. S. Woo, S. W. Ryu, S. W. Lee, C. M. Koh, Y. K. Baek, D. H. Bae, H. K. Lee, J. H. Lee, Y. H. Ryu, H. Y. Hwang, C. M. Yang, O. K. Lim, D. H. Park, S. H. An, J. H. Bae, S. M. Cho, B. S. Go, S. K. Hong, H. P. Jung, S. J. Kim, K. U. Lee, J. H. Park, J. H. Yang, G. Y. Byun, S. H. Byun, Y. J. Cho, C. G. Kim, J. H. Kim, S. K. Kim, S. I. Lee, W. H. Lee, K. Y. Oh, S. K. Oh, W. C. Shin, B. K. Song, and E. M. Bourim, “A novel diffractive micro-optical modulator for mobile display applications,” Proc. SPIE 6887, 688702 (2008). [CrossRef]

Other

• J. W. Goodman, Speckle Phenomena in Optics (Roberts and Co., 2006).
• M. W. Kowarz and J. G. Phalen, “High-contrast display system with scanned conformal grating device,” U.S. patent 6,678,085 (13 January 2004).
• S. Yun, “Open hole-based diffractive light modulator,” U.S. patent 7,206,118 (17 April 2007).
• V. Yurlov, A. Lapchuk, and J-H. Song, “Optical modulator and optical modulator module for reducing laser speckle,” U.S. patent application 20080055698 (6 March 2008).
• J. I. Trisnadi, “Method and apparatus for reducing laser speckle,” U.S. patent 6,323,984 (27 November 2001).
• A. Papoulis, Systems and Transforms with Applications in Optics (McGraw-Hill, 1968).

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