NDLI: Full-circular surface acoustic wave excitation for high resolution acoustic microscopy using spherical lens and time gate technology

Content Provider	IEEE Xplore Digital Library
Author	Ishikawa, I. Katakura, K. Ogura, Y.
Copyright Year	1986
Abstract	With a fixed gate width under the condition where the focus of an acoustic lens was set inside the sample, we varied signal taking-in time. Discrimination was made between differences in time required for an ultrasonic signal reflected from the sample to reach the acoustic lens. This process also enabled three types of images to be obtained separately: the surface reflection wave image, a combination of images based on the interference of the surface reflection wave with surface acoustic waves, and the surface acoustic wave image. Thus it was presumed that this process also would reveal the causes of image contrast and allow an easy interpretation of images. Furthermore, the image resolution was improved, because the surface acoustic wave image was drawn by an ultrasonic beam produced by full-circular surface acoustic wave excitation propagating toward the center converging concentrically; the theoretical resolution was 0.4 times the value of the surface acoustic wave wavelength /spl lambda//sub R/ and independent of the defocus value of the acoustic lens. Several kinds of samples were observed with this method. The results showed that the new method permitted observation of the internal structures of samples while offering new knowledge through the data reflecting the ultrasonic wave damping and scatter drawn on the display.
Page Count	6
File Size	1185252
Starting Page	41
Ending Page	46
File Format	PDF
ISSN	08853010
Volume Number	46
Issue Number	1
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1999-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Surface acoustic waves Acoustic waves Lenses Optical reflection Acoustic reflection Image resolution Signal resolution Focusing Interference Acoustic beams
Content Type	Text
Resource Type	Article
Subject	Acoustics and Ultrasonics Instrumentation Electrical and Electronic Engineering

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Angular spectral approach to reflection of focused beams with oblique incidence in spherical-planar-pair lenses

Use of a Conical Axicon as a Surface Acoustic Wave Focusing Device

Lens design for acoustic microscopy

A Lamb wave lens for acoustic microscopy

The Evaluation of V(z) in a Type II Reflection Microscope

A new focusing ultrasonic transducer and two foci acoustic lens for acoustic microscopy

Effect of periodic surface roughness on V(z) curves for the line-focus acoustic microscope

Characteristics of Reflected Bulk Acoustic Waves in Rotated Y-Cut Quartz

Space-time modulation of an X-ray beam by ultrasonic superlattice

Full-circular surface acoustic wave excitation for high resolution acoustic microscopy using spherical lens and time gate technology

Similar Documents

Angular spectral approach to reflection of focused beams with oblique incidence in spherical-planar-pair lenses

Use of a Conical Axicon as a Surface Acoustic Wave Focusing Device

Lens design for acoustic microscopy

A Lamb wave lens for acoustic microscopy

The Evaluation of V(z) in a Type II Reflection Microscope

A new focusing ultrasonic transducer and two foci acoustic lens for acoustic microscopy

Effect of periodic surface roughness on V(z) curves for the line-focus acoustic microscope

Characteristics of Reflected Bulk Acoustic Waves in Rotated Y-Cut Quartz

Space-time modulation of an X-ray beam by ultrasonic superlattice

Full-circular surface acoustic wave excitation for high resolution acoustic microscopy using spherical lens and time gate technology