公开(公告)号：EP1554539A4

公开(公告)日：2007-02-21

申请号：EP03774782

申请日：2003-10-08

Applicant: BECHTEL BWXT IDAHO LLC

Inventor： DEASON VANCE A ,  TELSCHOW KENNETH L

IPC: A61B20060101 ,  G01B9/02 ,  G01B9/04 ,  G01B11/02 ,  G01H9/00 ,  G01J9/02

CPC classification number: G01H9/002 ,  G01B9/04 ,  G01H9/00 ,  G01J2009/0265

Abstract: An imaging system includes: an object wavefront source (12) and an optical microscope objective (4) all positioned to direct an object wavefront onto an area of a vibrating subject (6) surface encompassed by a field of view of the microscope objective (4), and to direct a modulated object wavefront reflected from the encompassed surface area through a photorefractive material (XTAL); and a reference wavefront source (12) and at least one phase modulator (MOD) all positioned to direct a reference wavefront through the phase modulator (MOD) and to direct a modulated reference wavefront from the phase modulator (MOD) through the photorefractive material (XTAL) to interfere with the modulated object wavefront. The photorefractive material (XTAL) has a composition and a position such that interference of the modulated object wavefront and modulated reference wavefront occurs within the photorefractive material, (XTAL) providing a full-field, real-time image signal of the encompassed surface area (6).

公开(公告)号：EP1409954A4

公开(公告)日：2006-11-02

申请号：EP01911139

申请日：2001-02-22

Applicant: BECHTEL BWXT IDAHO LLC

Inventor： DEASON VANCE A ,  TELSCHOW KENNETH L

IPC: G01N29/24 ,  G01H9/00 ,  G01N29/22 ,  G01S15/89 ,  G01S17/89 ,  G03H3/00

CPC classification number: G01S15/8968 ,  G01H9/00 ,  G01N29/223 ,  G01N29/2418 ,  G01N2291/012 ,  G01N2291/015 ,  G01N2291/0423 ,  G01N2291/0427 ,  G01S17/89 ,  G03H3/00 ,  G03H2226/11 ,  G03H2260/36 ,  G03H2260/54

Abstract: The present invention comprises a source (18) for vibrating the object (12) to produce at least one acoustic wave therein. The acoustic wave results in at least one surface displacement on the surface of the object (12). A light source (28) produces an optical object wavefront (30) and an optical reference wavefront (32) and directs the object wavefront (30) toward the object (12) to produce a modulated object wavefront (42). A modulator (44) operatively modulates the reference wavefront (32) in synchronization with the acoustic wave to produce a modulated reference wavefront (46). A sensing medium (48) positioned to receive the modulated object wavefront (42) and the modulated reference wavefront (46) combines the wavefronts (42, 46) to produce an image related to the surface displacement of the object (12). A detector (54) detects the image related to the surface displacement. A processing system (56) associated with the detector (54) constructs an acoustic image of interior features of the object (12) based on the phase and amplitude of the surface displacement of the object (12).

公开(公告)号：EP1012536A4

公开(公告)日：2002-01-02

申请号：EP99933786

申请日：1999-07-08

Applicant: BECHTEL BWXT IDAHO LLC

Inventor： TELSCHOW KENNETH L ,  DEASON VANCE A

IPC: G01H9/00 ,  G01B9/02

CPC classification number: G01H9/00 ,  G01H9/002

Abstract: An apparatus (10) is provided for imaging traveling waves (14) in a medium (12). A wavefront is modulated by a modulator (43) at a frequency such that a difference frequency between wavefronts is within a response range of the sensing media (52). Such modulation produces an image of the vibrating medium having an output intensity that is substantially linear with small physical variation within the vibrating medium.