5 Matching Results

Search Results

Results: 1 - 5
open access

Automated Detection and Location of Indications in Eddy Current Signals

Description: A computer implemented information extraction process that locates and identifies eddy current signal features in digital point-ordered signals, said signals representing data from inspection of test materials, by enhancing the signal features relative to signal noise, detecting features of the signals, verifying the location of the signal features that can be known in advance, and outputting information about the identity and location of all detected signal features.
Date: June 30, 1998
Creator: Brudnoy, David M.; Oppenlander, Jane E. & Levy, Arthur J.
Partner: UNT Libraries Government Documents Department
open access

Miniature Videoprobe Hockey Stick Delivery System

Description: The present invention is a miniature videoprobe system having a probe termination box, a strong back, and a videoprobe housing. The videoprobe system is able to obtain images from a restricted space at least as small as 0.125 inches while producing a high quality image. The strong back has a hockey stick shape with the probe termination box connecting to the top of the handle-like portion of the hockey stick and the videoprobe housing attaching to the opposite end or nose of the hockey stick sh… more
Date: June 18, 1998
Creator: Hale, Lester R. & McMurry, Kyle M.
Partner: UNT Libraries Government Documents Department
open access

Free Motion Scanning System

Description: The present invention relates to an ultrasonic scanner and method for the imaging of a part surface, the scanner comprising: a probe assembly spaced apart from the surface including at least two tracking signals for emitting electromagnetic radiation and a transmitter for emitting ultrasonic waves onto a surface in order to induce at least a portion of said waves to be reflected from the surface, at least one detector for receiving the electromagnetic radiation wherein the detector is positione… more
Date: June 18, 1998
Creator: Sword, Charles K.
Partner: UNT Libraries Government Documents Department
open access

Reduction of B-Integral Accumulation in Lasers

Description: A pulsed laser is provided wherein the B-integral accumulated in the laser pulse is reduced using a semiconductor wafer. A laser pulse is generated by a laser pulse source. The laser pulse passes through a semiconductor wafer that has a negative nonlinear index of refraction. Thus, the laser pulse accumulates a negative B-integral. The laser pulse is then fed into a laser amplification medium, which has a positive nonlinear index of refraction. The laser pulse may make a plurality of passes thr… more
Date: June 5, 1998
Creator: Meyerhofer, David D. & Konoplev, Oleg A.
Partner: UNT Libraries Government Documents Department
open access

Improved Spatial Filter for high power Lasers

Description: A new pinhole architecture incorporates features intended to reduce the rate of plasma generation in a spatial filter for high-energy laser pulse beams. An elongated pinhole aperture is provided in an apertured body for rejecting off-axis rays of the laser pulse beam. The internal surface of the elongated aperture has a diameter which progressively tapers from a larger entrance cross-sectional area at an inlet to a smaller output cross-sectional area at an outlet. The tapered internal surface c… more
Date: June 1, 1998
Creator: Estabrook, Kent G.; Celliers, Peter M.; Murray, James E.; DaSilva, Luiz; MacGowan, Brian J.; Rubenchik, Alexander M. et al.
Partner: UNT Libraries Government Documents Department
Back to Top of Screen