Acoustic microscope

Details Acoustic microscope Acoustic microscope

1984-03-06

1986-01-14

Birmiel, Howard A.

Measuring and testing

Vibration

By mechanical waves

73599, 73615, 73629, 73634, G01N 2900

Patent

active

045638985

ABSTRACT:
An acoustic microscope comprising an acoustic transducer which performs both generation and detection of acoustic wave beams, and a sample holding member which opposes to an acoustic wave transmitting and receiving surface of the transducer, to hold an object sample through an acoustic wave propagating medium and to offer behind the sample a layer of an acoustic impedance unequal to that of the sample, so that the sample holding member is moved in parallel, thereby to detect acoustic waves reflected from front and rear surfaces of the sample and acoustic waves reflected from a surface of the sample holding member without reaching the sample and to measure amplitudes and returning periods of time of the reflected acoustic waves, so as to measure the velocity of sound through the sample of unknown thickness, the acoustic impedance of the sample, etc. from the measured values.

REFERENCES:
patent: 4378699 (1983-04-01), Wickramasinghe
patent: 4420979 (1983-12-01), Momii et al.
patent: 4487069 (1984-12-01), Ishikawa et al.

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