Abstract

Speckle reduction by moving diffuser has been previously studied in display systems with coherent light sources, such as lasers. In this Letter, we propose a motionless diffractive optical element (DOE) for speckle reduction. The DOE was designed based on finite-element method simulations, fabricated using micromachining technology, and characterized for despeckle efficiency. Experiments using a DOE with two gratings have indicated that the speckle was suppressed to 50%, which shows fair agreement with theoretical analysis. With some modification of this DOE, the speckle noise can be reduced to 10% according to the theory.

© 2010 Optical Society of America

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References

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  1. J. W. Goodman, Speckle Phenomena in Optics: Theory and Applications (Roberts, 2007).
  2. S. Lowenthal and D. Joyeux, J. Opt. Soc. Am. 61, 847 (1971).
    [Crossref]
  3. J. I. Trisnadi, Opt. Lett. 29, 11 (2004).
    [Crossref] [PubMed]
  4. S. An, A. Lapchuk, V. Yurlov, J. Song, H. Park, J. Jang, W. Shin, S. Karagpoltsev, and S. Yun, Opt. Express 17, 92(2009).
    [Crossref] [PubMed]
  5. M. N. Akram, V. Kartashov, and Z. Tong, Opt. Lett. 35, 444 (2010).
    [Crossref] [PubMed]
  6. V. Kartashov, L. Henriksen, J. H. Ulvensøen, B. Svardal, T. Svortdal, R. Berglind, and G. Hedin, J. Soc. Inf. Disp. 17, 581 (2009).
    [Crossref]
  7. V. Kartashov and M. N. Akram, “Speckle suppression in projection displays by using a motionless changing diffuser,” to be presented at Speckle 2010, Florianopolis, Brazil, September 13–15, 2010.
  8. G. Ouyang, K. Wang, M. N. Akram, and X. Chen, Proc. SPIE 7426, 742604 (2009).
    [Crossref]
  9. G. Ouyang, K. Wang, L. Henriksen, M. N. Akram, and X. Y. Chen, Sens. Actuators A 158, 313 (2010).
    [Crossref]
  10. Z. M. Tong, G. M. Ouyang, W. H. Gao, M. N. Akram, V. Kartashov, K. Y. Wang, and X. Y. Chen, “Simulation of laser speckle reduction by using an array of diffraction gratings,” to be presented at Speckle 2010, Florianopolis, Brazil, September 13–15, 2010.

2010 (2)

G. Ouyang, K. Wang, L. Henriksen, M. N. Akram, and X. Y. Chen, Sens. Actuators A 158, 313 (2010).
[Crossref]

M. N. Akram, V. Kartashov, and Z. Tong, Opt. Lett. 35, 444 (2010).
[Crossref] [PubMed]

2009 (3)

S. An, A. Lapchuk, V. Yurlov, J. Song, H. Park, J. Jang, W. Shin, S. Karagpoltsev, and S. Yun, Opt. Express 17, 92(2009).
[Crossref] [PubMed]

V. Kartashov, L. Henriksen, J. H. Ulvensøen, B. Svardal, T. Svortdal, R. Berglind, and G. Hedin, J. Soc. Inf. Disp. 17, 581 (2009).
[Crossref]

G. Ouyang, K. Wang, M. N. Akram, and X. Chen, Proc. SPIE 7426, 742604 (2009).
[Crossref]

2004 (1)

1971 (1)

Akram, M. N.

M. N. Akram, V. Kartashov, and Z. Tong, Opt. Lett. 35, 444 (2010).
[Crossref] [PubMed]

G. Ouyang, K. Wang, L. Henriksen, M. N. Akram, and X. Y. Chen, Sens. Actuators A 158, 313 (2010).
[Crossref]

G. Ouyang, K. Wang, M. N. Akram, and X. Chen, Proc. SPIE 7426, 742604 (2009).
[Crossref]

V. Kartashov and M. N. Akram, “Speckle suppression in projection displays by using a motionless changing diffuser,” to be presented at Speckle 2010, Florianopolis, Brazil, September 13–15, 2010.

Z. M. Tong, G. M. Ouyang, W. H. Gao, M. N. Akram, V. Kartashov, K. Y. Wang, and X. Y. Chen, “Simulation of laser speckle reduction by using an array of diffraction gratings,” to be presented at Speckle 2010, Florianopolis, Brazil, September 13–15, 2010.

An, S.

Berglind, R.

V. Kartashov, L. Henriksen, J. H. Ulvensøen, B. Svardal, T. Svortdal, R. Berglind, and G. Hedin, J. Soc. Inf. Disp. 17, 581 (2009).
[Crossref]

Chen, X.

G. Ouyang, K. Wang, M. N. Akram, and X. Chen, Proc. SPIE 7426, 742604 (2009).
[Crossref]

Chen, X. Y.

G. Ouyang, K. Wang, L. Henriksen, M. N. Akram, and X. Y. Chen, Sens. Actuators A 158, 313 (2010).
[Crossref]

Z. M. Tong, G. M. Ouyang, W. H. Gao, M. N. Akram, V. Kartashov, K. Y. Wang, and X. Y. Chen, “Simulation of laser speckle reduction by using an array of diffraction gratings,” to be presented at Speckle 2010, Florianopolis, Brazil, September 13–15, 2010.

Gao, W. H.

Z. M. Tong, G. M. Ouyang, W. H. Gao, M. N. Akram, V. Kartashov, K. Y. Wang, and X. Y. Chen, “Simulation of laser speckle reduction by using an array of diffraction gratings,” to be presented at Speckle 2010, Florianopolis, Brazil, September 13–15, 2010.

Goodman, J. W.

J. W. Goodman, Speckle Phenomena in Optics: Theory and Applications (Roberts, 2007).

Hedin, G.

V. Kartashov, L. Henriksen, J. H. Ulvensøen, B. Svardal, T. Svortdal, R. Berglind, and G. Hedin, J. Soc. Inf. Disp. 17, 581 (2009).
[Crossref]

Henriksen, L.

G. Ouyang, K. Wang, L. Henriksen, M. N. Akram, and X. Y. Chen, Sens. Actuators A 158, 313 (2010).
[Crossref]

V. Kartashov, L. Henriksen, J. H. Ulvensøen, B. Svardal, T. Svortdal, R. Berglind, and G. Hedin, J. Soc. Inf. Disp. 17, 581 (2009).
[Crossref]

Jang, J.

Joyeux, D.

Karagpoltsev, S.

Kartashov, V.

M. N. Akram, V. Kartashov, and Z. Tong, Opt. Lett. 35, 444 (2010).
[Crossref] [PubMed]

V. Kartashov, L. Henriksen, J. H. Ulvensøen, B. Svardal, T. Svortdal, R. Berglind, and G. Hedin, J. Soc. Inf. Disp. 17, 581 (2009).
[Crossref]

V. Kartashov and M. N. Akram, “Speckle suppression in projection displays by using a motionless changing diffuser,” to be presented at Speckle 2010, Florianopolis, Brazil, September 13–15, 2010.

Z. M. Tong, G. M. Ouyang, W. H. Gao, M. N. Akram, V. Kartashov, K. Y. Wang, and X. Y. Chen, “Simulation of laser speckle reduction by using an array of diffraction gratings,” to be presented at Speckle 2010, Florianopolis, Brazil, September 13–15, 2010.

Lapchuk, A.

Lowenthal, S.

Ouyang, G.

G. Ouyang, K. Wang, L. Henriksen, M. N. Akram, and X. Y. Chen, Sens. Actuators A 158, 313 (2010).
[Crossref]

G. Ouyang, K. Wang, M. N. Akram, and X. Chen, Proc. SPIE 7426, 742604 (2009).
[Crossref]

Ouyang, G. M.

Z. M. Tong, G. M. Ouyang, W. H. Gao, M. N. Akram, V. Kartashov, K. Y. Wang, and X. Y. Chen, “Simulation of laser speckle reduction by using an array of diffraction gratings,” to be presented at Speckle 2010, Florianopolis, Brazil, September 13–15, 2010.

Park, H.

Shin, W.

Song, J.

Svardal, B.

V. Kartashov, L. Henriksen, J. H. Ulvensøen, B. Svardal, T. Svortdal, R. Berglind, and G. Hedin, J. Soc. Inf. Disp. 17, 581 (2009).
[Crossref]

Svortdal, T.

V. Kartashov, L. Henriksen, J. H. Ulvensøen, B. Svardal, T. Svortdal, R. Berglind, and G. Hedin, J. Soc. Inf. Disp. 17, 581 (2009).
[Crossref]

Tong, Z.

Tong, Z. M.

Z. M. Tong, G. M. Ouyang, W. H. Gao, M. N. Akram, V. Kartashov, K. Y. Wang, and X. Y. Chen, “Simulation of laser speckle reduction by using an array of diffraction gratings,” to be presented at Speckle 2010, Florianopolis, Brazil, September 13–15, 2010.

Trisnadi, J. I.

Ulvensøen, J. H.

V. Kartashov, L. Henriksen, J. H. Ulvensøen, B. Svardal, T. Svortdal, R. Berglind, and G. Hedin, J. Soc. Inf. Disp. 17, 581 (2009).
[Crossref]

Wang, K.

G. Ouyang, K. Wang, L. Henriksen, M. N. Akram, and X. Y. Chen, Sens. Actuators A 158, 313 (2010).
[Crossref]

G. Ouyang, K. Wang, M. N. Akram, and X. Chen, Proc. SPIE 7426, 742604 (2009).
[Crossref]

Wang, K. Y.

Z. M. Tong, G. M. Ouyang, W. H. Gao, M. N. Akram, V. Kartashov, K. Y. Wang, and X. Y. Chen, “Simulation of laser speckle reduction by using an array of diffraction gratings,” to be presented at Speckle 2010, Florianopolis, Brazil, September 13–15, 2010.

Yun, S.

Yurlov, V.

J. Opt. Soc. Am. (1)

J. Soc. Inf. Disp. (1)

V. Kartashov, L. Henriksen, J. H. Ulvensøen, B. Svardal, T. Svortdal, R. Berglind, and G. Hedin, J. Soc. Inf. Disp. 17, 581 (2009).
[Crossref]

Opt. Express (1)

Opt. Lett. (2)

Proc. SPIE (1)

G. Ouyang, K. Wang, M. N. Akram, and X. Chen, Proc. SPIE 7426, 742604 (2009).
[Crossref]

Sens. Actuators A (1)

G. Ouyang, K. Wang, L. Henriksen, M. N. Akram, and X. Y. Chen, Sens. Actuators A 158, 313 (2010).
[Crossref]

Other (3)

Z. M. Tong, G. M. Ouyang, W. H. Gao, M. N. Akram, V. Kartashov, K. Y. Wang, and X. Y. Chen, “Simulation of laser speckle reduction by using an array of diffraction gratings,” to be presented at Speckle 2010, Florianopolis, Brazil, September 13–15, 2010.

V. Kartashov and M. N. Akram, “Speckle suppression in projection displays by using a motionless changing diffuser,” to be presented at Speckle 2010, Florianopolis, Brazil, September 13–15, 2010.

J. W. Goodman, Speckle Phenomena in Optics: Theory and Applications (Roberts, 2007).

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Figures (5)

Fig. 1
Fig. 1

General structure of the projection display with the laser light source and the motionless despeckle modulator for speckle reduction.

Fig. 2
Fig. 2

Schematic drawing of the dynamic DOE. Picture at bottom shows the orientation of electrodes in each grating. The dimensions are not to scale.

Fig. 3
Fig. 3

Experiment setup for speckle measurement.

Fig. 4
Fig. 4

Comparison of multiple diffraction patterns from experiments (up) and ZEMAX simulations (down). The larger number of diffraction orders in the experiment compared to ZEMAX is because the gratings inside the dynamic DOE were not perfectly sinusoidal.

Fig. 5
Fig. 5

Images and sampling of intensity fluctuation of (a) the original speckle and (b) the reduced speckle. The CCD level 256 corresponds to the brightest spot in the speckle pattern, while 0 corresponds to the darkest spot in the speckle pattern.

Equations (1)

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C = M + K ± 1 M K ,

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