Fresnel focussed imaging system

Details Fresnel focussed imaging system Fresnel focussed imaging system

1978-01-03

1979-03-27

Kreitman, Stephen A.

Measuring and testing

Vibration

By mechanical waves

128 2V, G01N 2900

Patent

active

041459318

ABSTRACT:
An imaging system, particularly useful for acoustic medical diagnosis of a human subject, utilizes an array of radiating elements or sonic transducers located side-by-side and positioned along the subject. Signals received by the transducer are applied to a pair of pattern generation circuits which weight the individual signals by factors of +1, -1 or 0. Graphs of the weighting factors as a function of transducer location have the likeness of cosinusoidal and sinusoidal Fresnel patterns, these patterns being produced by the two circuits. The weighted signals of each pattern are summed together, multiplied by cosinusoidal and sinusoidal reference signals and then summed together to provide a radiation pattern which converges from the array to a focal point in front of the array while eliminating a diverging pattern from a virtual focus behind the array.

REFERENCES:
patent: 3504368 (1970-03-01), Ruben
patent: 3805596 (1974-04-01), Klahr
patent: 3911730 (1975-10-01), Niklas
patent: 3919683 (1975-11-01), Itamura et al.
patent: 4080838 (1978-03-01), Kuroda et al.
P. Alais et al.; "Fresnel Zone Focusing of Linear Arrays Applied to B and C Echography;" Acoustica Holography, vol. 7, pp. 509-522, 8-1976.

Affiliated with

Also associated with

Rating

Fresnel focussed imaging system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Fresnel focussed imaging system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fresnel focussed imaging system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1816709