Information: Join today and make your research activities more affordable! Technical workshop participation fees and annual registration fees are available at member rates.
Notice: [Important] Announcement of Changes to Registration Fee Payment and Manuscript Upload Procedures for IEICE Technical Meetings
IEICE Technical Committee Submission System
Conference Paper's Information		 Online Proceedings
[Sign in]
Tech. Rep. Archives
 Go Top Page Go Previous   [Japanese] / [English] 

Paper Abstract and Keywords
Presentation 2022-08-25 13:10
Diffractive optical element with limited long-distance focusing range
Masahiro Ueno, Sohan Kawamura, Takashi Sakamoto, Masayuki Tsuda (NTT) R2022-16 EMD2022-4 CPM2022-21 OPE2022-47 LQE2022-10
Abstract (in Japanese) (See Japanese page) 
(in English) In the rust removal using high-power laser, it is desirable to extend the focusing the focusing range to suppress the influence of fine movement of the hand when holding the laser emitting head, Further, from the viewpoint of safety, to keep the light intensity density as low as possible outside the focusing range, it is desirable that light diffusion occurs rapidly outside the range. In order to realize such a laser beam, We created a diffractive optical element (DOE) based on the phase distribution on the optical axis of the Bessel beam. Specifically, first, the points are arranged at equal intervals within a desired focusing range on the optical axis. Next, the electric field distribution on a DOE that generates a spherical wave in which the light phase at each of the points is the same as the phase of the Bessel beam is calculated for each point. Then, the sum of all the electric field distributions is calculated. Finally, the DOE that generates the phase distribution of the electric field distribution is produced. This DOE design method is characterized in that the beam diameter design and the beam diameter holding length design cab be made independently, The DOE fabricated by the design method maintains a peak power density of 30% or more of the maximum density and a beam diameter of about 130μm between 0.1m and 1m.
Keyword (in Japanese) (See Japanese page) 
(in English) Diffraction Optical Element / Rust Removal / Depth of Focus / Hologram / / / /  
Reference Info. IEICE Tech. Rep., vol. 122, no. 158, CPM2022-21, pp. 1-6, Aug. 2022.
Paper # CPM2022-21 
Date of Issue 2022-08-18 (R, EMD, CPM, OPE, LQE) 
ISSN 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 R2022-16 EMD2022-4 CPM2022-21 OPE2022-47 LQE2022-10

Conference Information
Committee EMD R LQE OPE CPM  
Conference Date 2022-08-25 - 2022-08-26 
Place (in Japanese) (See Japanese page) 
Place (in English)  
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To CPM 
Conference Code 2022-08-EMD-R-LQE-OPE-CPM 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Diffractive optical element with limited long-distance focusing range 
Sub Title (in English)  
Keyword(1) Diffraction Optical Element  
Keyword(2) Rust Removal  
Keyword(3) Depth of Focus  
Keyword(4) Hologram  
Keyword(5)  
Keyword(6)  
Keyword(7)  
Keyword(8)  
1st Author's Name Masahiro Ueno  
1st Author's Affiliation Nippon Telegraph and Telephone Corporation (NTT)
2nd Author's Name Sohan Kawamura  
2nd Author's Affiliation Nippon Telegraph and Telephone Corporation (NTT)
3rd Author's Name Takashi Sakamoto  
3rd Author's Affiliation Nippon Telegraph and Telephone Corporation (NTT)
4th Author's Name Masayuki Tsuda  
4th Author's Affiliation Nippon Telegraph and Telephone Corporation (NTT)
5th Author's Name  
5th Author's Affiliation ()
6th Author's Name  
6th Author's Affiliation ()
7th Author's Name  
7th Author's Affiliation ()
8th Author's Name  
8th Author's Affiliation ()
9th Author's Name  
9th Author's Affiliation ()
10th Author's Name  
10th Author's Affiliation ()
11th Author's Name  
11th Author's Affiliation ()
12th Author's Name  
12th Author's Affiliation ()
13th Author's Name  
13th Author's Affiliation ()
14th Author's Name  
14th Author's Affiliation ()
15th Author's Name  
15th Author's Affiliation ()
16th Author's Name  
16th Author's Affiliation ()
17th Author's Name  
17th Author's Affiliation ()
18th Author's Name  
18th Author's Affiliation ()
19th Author's Name  
19th Author's Affiliation ()
20th Author's Name  
20th Author's Affiliation ()
21st Author's Name  
21st Author's Affiliation ()
22nd Author's Name  
22nd Author's Affiliation ()
23rd Author's Name  
23rd Author's Affiliation ()
24th Author's Name  
24th Author's Affiliation ()
25th Author's Name  
25th Author's Affiliation ()
26th Author's Name / /
26th Author's Affiliation ()
()
27th Author's Name / /
27th Author's Affiliation ()
()
28th Author's Name / /
28th Author's Affiliation ()
()
29th Author's Name / /
29th Author's Affiliation ()
()
30th Author's Name / /
30th Author's Affiliation ()
()
31st Author's Name / /
31st Author's Affiliation ()
()
32nd Author's Name / /
32nd Author's Affiliation ()
()
33rd Author's Name / /
33rd Author's Affiliation ()
()
34th Author's Name / /
34th Author's Affiliation ()
()
35th Author's Name / /
35th Author's Affiliation ()
()
36th Author's Name / /
36th Author's Affiliation ()
()
Speaker Author-1 
Date Time 2022-08-25 13:10:00 
Presentation Time 25 minutes 
Registration for CPM 
Paper # R2022-16, EMD2022-4, CPM2022-21, OPE2022-47, LQE2022-10 
Volume (vol) vol.122 
Number (no) no.156(R), no.157(EMD), no.158(CPM), no.159(OPE), no.160(LQE) 
Page pp.1-6 
#Pages 6 
Date of Issue 2022-08-18 (R, EMD, CPM, OPE, LQE) 

[Return to Top Page]

[Return to IEICE Web Page]
The Institute of Electronics, Information and Communication Engineers (IEICE), Japan