Paper Abstract and Keywords |
Presentation |
2014-01-24 11:20
Study on speckle contrast by use of a spectrum broadened laser beam from a semiconductor laser with high-frequency signal superposition Hiroshi Murata, Kazuhisa Yamamoto, Yasuyuki Okamura (Osaka Univ.) PN2013-89 OPE2013-203 LQE2013-189 EST2013-138 MWP2013-109 Link to ES Tech. Rep. Archives: OPE2013-203 LQE2013-189 EST2013-138 MWP2013-109 |
Abstract |
(in Japanese) |
(See Japanese page) |
(in English) |
Laser displays and laser illuminations have been attracting a lot of interest owing to their excellent characteristics; wide color gamut, high color fidelity, and low-electrical-power consumption compared to conventional systems. These advantages of laser displays/illuminations essentially come from a laser’s unique feature as a light source: very high coherence in both temporal and spatial domains. However, this high coherence may cause unwanted interference patterns on images, called “speckle noise.” Reduction of speckle noise is a key issue in the further development and utilization of laser displays and illuminations. In this report, experimental results on speckle control by use of high-frequency signal superposition are presented. Speckle contrast of images generated by a red semiconductor laser was measured precisely utilizing the speckle measurement system with a cooled CCD camera and auto-power-level adjustments. By adopting 500MHz signal superposition to the red laser, the speckle contrast values were drastically reduced from 0.9 to 0.2. |
Keyword |
(in Japanese) |
(See Japanese page) |
(in English) |
Laser display / Optical modulation / Speckle / Speckle contrast / / / / |
Reference Info. |
IEICE Tech. Rep., vol. 113, no. 394, OPE2013-203, pp. 337-340, Jan. 2014. |
Paper # |
OPE2013-203 |
Date of Issue |
2014-01-16 (PN, OPE, LQE, EST, MWP) |
ISSN |
Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 |
Copyright and reproduction |
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) |
Download PDF |
PN2013-89 OPE2013-203 LQE2013-189 EST2013-138 MWP2013-109 Link to ES Tech. Rep. Archives: OPE2013-203 LQE2013-189 EST2013-138 MWP2013-109 |
Conference Information |
Committee |
MWP EMT PN LQE OPE EST IEE-EMT |
Conference Date |
2014-01-23 - 2014-01-24 |
Place (in Japanese) |
(See Japanese page) |
Place (in English) |
Doshisha University |
Topics (in Japanese) |
(See Japanese page) |
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Paper Information |
Registration To |
OPE |
Conference Code |
2014-01-MWP-EMT-PN-LQE-OPE-EST-EMT |
Language |
Japanese |
Title (in Japanese) |
(See Japanese page) |
Sub Title (in Japanese) |
(See Japanese page) |
Title (in English) |
Study on speckle contrast by use of a spectrum broadened laser beam from a semiconductor laser with high-frequency signal superposition |
Sub Title (in English) |
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Keyword(1) |
Laser display |
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Optical modulation |
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Speckle |
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Speckle contrast |
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1st Author's Name |
Hiroshi Murata |
1st Author's Affiliation |
Osaka University (Osaka Univ.) |
2nd Author's Name |
Kazuhisa Yamamoto |
2nd Author's Affiliation |
Osaka University (Osaka Univ.) |
3rd Author's Name |
Yasuyuki Okamura |
3rd Author's Affiliation |
Osaka University (Osaka Univ.) |
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Speaker |
Author-1 |
Date Time |
2014-01-24 11:20:00 |
Presentation Time |
25 minutes |
Registration for |
OPE |
Paper # |
PN2013-89, OPE2013-203, LQE2013-189, EST2013-138, MWP2013-109 |
Volume (vol) |
vol.113 |
Number (no) |
no.393(PN), no.394(OPE), no.395(LQE), no.396(EST), no.397(MWP) |
Page |
pp.337-340 |
#Pages |
4 |
Date of Issue |
2014-01-16 (PN, OPE, LQE, EST, MWP) |
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