Gary James Langlois

US Patent:

39835294, Sep 28, 1976

Filed:

Mar 28, 1975

Appl. No.:

5/563123

Inventors:

Gary Norris Langlois - Richland WA

Assignee:

Holosonics, Inc. - Richland WA

International Classification:

G01N 2904
G01S 966

US Classification:

340 5H

Abstract:

An improved detector having a reflective surface which is substantially insensitive to vibration. The detection surface comprises a thin layer of liquid metal which is disposed over a substantially rigid, wettable substrate. In a presently preferred embodiment, the detector comprises a receptacle having disposed therein a rigid brass plate covered by a thin layer of mercury. The detector is submersed in a suitable fluid, such as water, to which an acidic substance has been added to reduce the pH of the fluid to the range of 5 to 6.

US Patent:

44035080, Sep 13, 1983

Filed:

Jun 10, 1981

Appl. No.:

6/272227

Inventors:

Gary N. Langlois - Richland WA

International Classification:

G01N 2902
G01F 2328

US Classification:

73589

Abstract:

Measurement of the relative and actual value of acoustic characteristic impedances of an unknown substance, location of the interfaces of vertically-layered materials, and the determination of the concentration of a first material mixed in a second material. A highly damped ultrasonic pulse is transmitted into one side of a reference plate, such as a tank wall, where the other side of the reference plate is in physical contact with the medium to be measured. The amplitude of a return signal, which is the reflection of the transmitted pulse from the interface between the other side of the reference plate and the medium, is measured. The amplitude value indicates the acoustic characteristic impedance of the substance relative to that of the reference plate or relative to that of other tested materials. Discontinuities in amplitude with repeated measurements for various heights indicate the location of interfaces in vertically-layered materials. Standardization techniques permit the relative acoustic characteristic impedance of a substance to be converted to an actual value.

US Patent:

39640523, Jun 15, 1976

Filed:

Mar 28, 1975

Appl. No.:

5/563219

Inventors:

Gary Norris Langlois - Richland WA

Assignee:

Holosonics, Inc. - Richland WA

International Classification:

G01N 2904

US Classification:

340 5H

Abstract:

An improved system for ensonifying an object, which comprises upper and lower fluid-filled chambers. The chambers are separated by a partition including a lens; a further, movable lens may be disposed within the upper chamber. A reflective-type detector is disposed in the floor of the bottom chamber, and ports provided at opposite sides of the chamber for light impinging upon, and reflected from, the detector surface. A resilient closure at the upper end of the upper chamber conformably receives the surface of an object to be ensonified. A transducer producing the object, or ensonifying, acoustic beam is disposed within another fluid-filled enclosure one wall of which comprises a flexible membrane. The latter membrane is disposed against the upper side of the object to be ensonified and conforms thereto so that a relatively continuous fluid path is presented between the transducer and the object, and from the object to the detector. In a preferred embodiment, a reference acoustic beam is produced by another transducer disposed within the lower chamber, the angle between the object and reference beams which impinge upon the detector advantageously being at least 60. degree. to 75. degree.