CA2094241A1 - Surface feature mapping using high resolution c-scan ultrasonography - Google Patents

Surface feature mapping using high resolution c-scan ultrasonography

Info

Publication number
CA2094241A1
CA2094241A1 CA002094241A CA2094241A CA2094241A1 CA 2094241 A1 CA2094241 A1 CA 2094241A1 CA 002094241 A CA002094241 A CA 002094241A CA 2094241 A CA2094241 A CA 2094241A CA 2094241 A1 CA2094241 A1 CA 2094241A1
Authority
CA
Canada
Prior art keywords
ultrasonic
scan
finger
imaging
high resolution
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002094241A
Other languages
French (fr)
Other versions
CA2094241C (en
Inventor
William E. Glenn
John K. Schneider
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ultra Scan Corp
Original Assignee
William E. Glenn
John K. Schneider
Niagara Technology Incorporated
Ultra-Scan Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by William E. Glenn, John K. Schneider, Niagara Technology Incorporated, Ultra-Scan Corporation filed Critical William E. Glenn
Publication of CA2094241A1 publication Critical patent/CA2094241A1/en
Application granted granted Critical
Publication of CA2094241C publication Critical patent/CA2094241C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/18—Methods or devices for transmitting, conducting or directing sound
    • G10K11/26—Sound-focusing or directing, e.g. scanning
    • G10K11/35—Sound-focusing or directing, e.g. scanning using mechanical steering of transducers or their beams
    • G10K11/357—Sound-focusing or directing, e.g. scanning using mechanical steering of transducers or their beams by moving a reflector
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
    • G01S15/88—Sonar systems specially adapted for specific applications
    • G01S15/89—Sonar systems specially adapted for specific applications for mapping or imaging
    • G01S15/8906—Short-range imaging systems; Acoustic microscope systems using pulse-echo techniques
    • G01S15/8934—Short-range imaging systems; Acoustic microscope systems using pulse-echo techniques using a dynamic transducer configuration
    • G01S15/8947—Short-range imaging systems; Acoustic microscope systems using pulse-echo techniques using a dynamic transducer configuration using transducers movable by (electro)magnetic means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
    • G01S7/52017—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00 particularly adapted to short-range imaging
    • G01S7/52053—Display arrangements
    • G01S7/52057—Cathode ray tube displays
    • G01S7/5206—Two-dimensional coordinated display of distance and direction; B-scan display
    • G01S7/52061—Plan position indication (PPI display); C-scan display
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G06V40/12—Fingerprints or palmprints
    • G06V40/13—Sensors therefor
    • G06V40/1306—Sensors therefor non-optical, e.g. ultrasonic or capacitive sensing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
    • G01S15/88—Sonar systems specially adapted for specific applications
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
    • G01S15/88—Sonar systems specially adapted for specific applications
    • G01S15/89—Sonar systems specially adapted for specific applications for mapping or imaging
    • G01S15/8906—Short-range imaging systems; Acoustic microscope systems using pulse-echo techniques
    • G01S15/8995—Combining images from different aspect angles, e.g. spatial compounding

Abstract

An ultrasonic system and method for imaging a surface wherein a C-mode ultrasonic scan is performed over a fixed area of the surface and range gating is applied to that area to a given depth below the surface. For use of the system and method in fingerprint imaging, a live finger is placed upon a sensitive surface, the portion of the finger on the surface is scanned using the ultrasonic energy, and ultrasonic energy returned from the finger portion is received to capture an electronic image of the pattern of ridges and valleys of the fingerprint. The ultrasonic imaging system comprises a probe (102) for providing a directed output ultrasonic beam to scan the surface and to receive ultrasonic echos from the surface, a pulser-receiver (104), a signal processing circuit (108). The probe scans the surface along one direction, and then along another direction, the two directions preferably be-ing orthogonal.
CA002094241A 1990-11-07 1991-11-06 Surface feature mapping using high resolution c-scan ultrasonography Expired - Lifetime CA2094241C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US07/610,429 US5224174A (en) 1990-11-07 1990-11-07 Surface feature mapping using high resolution c-scan ultrasonography
US610,429 1990-11-07
PCT/US1991/008321 WO1992009049A1 (en) 1990-11-07 1991-11-06 Surface feature mapping using high resolution c-scan ultrasonography

Publications (2)

Publication Number Publication Date
CA2094241A1 true CA2094241A1 (en) 1992-05-08
CA2094241C CA2094241C (en) 2002-04-23

Family

ID=24444985

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002094241A Expired - Lifetime CA2094241C (en) 1990-11-07 1991-11-06 Surface feature mapping using high resolution c-scan ultrasonography

Country Status (6)

Country Link
US (3) US5224174A (en)
EP (1) EP0556289B1 (en)
AT (1) ATE181164T1 (en)
CA (1) CA2094241C (en)
DE (1) DE69131323D1 (en)
WO (1) WO1992009049A1 (en)

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Also Published As

Publication number Publication date
US5224174A (en) 1993-06-29
EP0556289A1 (en) 1993-08-25
US5689576A (en) 1997-11-18
EP0556289A4 (en) 1994-06-08
CA2094241C (en) 2002-04-23
EP0556289B1 (en) 1999-06-09
WO1992009049A1 (en) 1992-05-29
DE69131323D1 (en) 1999-07-15
ATE181164T1 (en) 1999-06-15
US5587533A (en) 1996-12-24

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