US 4,733,963 A · Method of measuring a sound pressure distribution in a solid body due to a ultrasonic probe by using photoelasticity

Abstract

A method for obtaining quantitative data which relates the sound pressure distribution in a body to an ultrasound pulse waveform which propagates through the body, based on photoelastic measurement and analysis. The method involves producing a first image of the body, into which the ultrasound pulse was launched, by recording the image of linearly polarized straboscopic light which is directed into the body. Thereafter, a second image is taken of the stroboscopic light with the principal axis of the linear polarizer offset by 45.degree. relative to the first image. The first and second images are combined to produce a synthesized image and the above-mentioned quantitative data is derived from the synthesized image.

Claims9

Dependent claims

A method for determining a sound pressure distribution in a solid body, comprising:

launching into the solid body an ultrasonic pulse waveform;
directing light from a stroboscopic light source into the solid body during a time when the pulse waveform is propagating in the solid body, through a linear polarization device having a principal axis which is aligned at a first predetermined angle;
generating a first image of the light passing through the body with the principal axis at the first predetermined angle;
generating a second image of the light passing through the solid body with the principal axis offset at about 45.degree. from the predetermined first angle;
and
combining the first and second images to produce a synthesized image.

3 more elements

Dependencies are inferred from the claim text.

Method of measuring a sound pressure distribution in a solid body due to a ultrasonic probe by using photoelasticity

Life of this patent

Method of measuring a sound pressure distribution in a solid body due to a ultrasonic probe by using photoelasticity

Life of this patent

Abstract

Claims9