Laser ultrasonics for measurement of the thickness of metal plates using a photorefractive liquid crystal

被引：0

作者：

Sasaki, Takeo ^{[1
]}

Takashi, Toshinobu ^{[1
]}

Ikeda, Gouta ^{[1
]}

Watanabe, Junko ^{[1
]}

Nagaoka, Miku ^{[1
]}

Yamazaki, Shinnosuke ^{[1
]}

Naka, Yumiko ^{[1
]}

Van Le, Khoa ^{[1
]}

机构：

[1] Tokyo Univ Sci, Fac Sci, Dept Chem, 1-3 Kagurazaka,Shinjuku Ku, Tokyo 1628601, Japan

来源：

HOLOGRAPHY: ADVANCES AND MODERN TRENDS VIII | 2023年 / 12574卷

关键词：

Photorefractive effect; flexoelectric liquid crystals; ferroelectric liquid crystals; laser ultrasonics; SURFACE; SENSOR; MOTION;

D O I：

10.1117/12.2664898

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The photorefractive effect of smectic liquid crystal mixtures was investigated and the application to laser ultrasonic measurements was demonstrated. Smectic liquid crystal mixtures, composed of smectic-C liquid crystals, photoconductive chiral compounds, and a sensitizer, exhibit a fast photorefractive effect. The principle of ultrasonic measurement is that a nanosecond laser pulse is shot on an object to cause an ultrasonic vibration, a continuous laser beam is irradiated on the object, and the ultrasonic variation is detected using photorefractive two-beam coupling. This method can investigate an object's thickness and internal structure without contact.

引用

页数：10

共 27 条

[21] Photorefractive effect of photoconductive ferroelectric liquid crystalline mixtures composed of photoconductive chiral compounds and liquid crystal
Sasaki, Takeo
Miyazaki, Daisuke
Akaike, Komei
Ikegami, Masashi
Naka, Yumiko
[J]. JOURNAL OF MATERIALS CHEMISTRY, 2011, 21 (24) : 8678 - 8686
[22] Scruby C.B., 1990, LASER ULTRASONICS TE
[23] Comparative Study of Laser Doppler Vibrometer and Capacitive Air-coupled Transducer for Ultrasonic Propagation Imager and the New Development of an Efficient Ultrasonic Wavenumber Imaging Algorithm
Truong, C. T.
Kang, D. -H.
Lee, J. -R.
Farrar, C. R.
[J]. STRAIN, 2015, 51 (04): : 332 - 342
[24] Photorefractive liquid crystals
Wiederrecht, GP
[J]. ANNUAL REVIEW OF MATERIALS RESEARCH, 2001, 31 : 139 - 169
[25] Yeh P., 1993, Introduction to photorefractive nonlinear optics
[26] Laser ultrasonic receivers based on organic photorefractive polymer composites
Zamiri, Saeid
Reitinger, Bernhard
Portenkirchner, Engelbert
Berer, Thomas
Font-Sanchis, Enrique
Burgholzer, Peter
Sariciftci, Niyazi Serdar
Bauer, Siegfried
Fernandez-Lazaro, Fernando
[J]. APPLIED PHYSICS B-LASERS AND OPTICS, 2014, 114 (04): : 509 - 515
[27] Full noncontact laser ultrasound: first human data
Zhang, Xiang
Fincke, Jonathan R.
Wynn, Charles M.
Johnson, Matt R.
Haupt, Robert W.
Anthony, Brian W.
[J]. LIGHT-SCIENCE & APPLICATIONS, 2019, 8 (01)

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