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fingerprint sensor resolution test pattern  (National Institute of Standards and Technology)
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National Institute of Standards and Technology fingerprint sensor resolution test pattern
( a ) Equivalent circuit model for receiving. ( b ) Pulse-echo images. Top: National Institute of Standards and Technology <t>fingerprint</t> resolution test composed of converging parallel lines. Bottom: axial resolution demonstration using two overlaid patterns separated by 127 μm in depth. ( c ) Ultrasound fingerprint image collected at the epidermis and sub-epidermis layer (top). Good agreement is observed between the ultrasonic images and the optical fingerprint image.
Fingerprint Sensor Resolution Test Pattern, supplied by National Institute of Standards and Technology, used in various techniques. Bioz Stars score: 90/100, based on 1 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
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( a ) Equivalent circuit model for receiving. ( b ) Pulse-echo images. Top: National Institute of Standards and Technology fingerprint resolution test composed of converging parallel lines. Bottom: axial resolution demonstration using two overlaid patterns separated by 127 μm in depth. ( c ) Ultrasound fingerprint image collected at the epidermis and sub-epidermis layer (top). Good agreement is observed between the ultrasonic images and the optical fingerprint image.

Journal: Microsystems & Nanoengineering

Article Title: Monolithic ultrasound fingerprint sensor

doi: 10.1038/micronano.2017.59

Figure Lengend Snippet: ( a ) Equivalent circuit model for receiving. ( b ) Pulse-echo images. Top: National Institute of Standards and Technology fingerprint resolution test composed of converging parallel lines. Bottom: axial resolution demonstration using two overlaid patterns separated by 127 μm in depth. ( c ) Ultrasound fingerprint image collected at the epidermis and sub-epidermis layer (top). Good agreement is observed between the ultrasonic images and the optical fingerprint image.

Article Snippet: In each column’s TX cycle, five adjacent columns ( N −2, N −1, N , N +1, N +2) of 56 PMUTs are excited without beamforming, and the center column ( N ) is used as receivers. shows a 2D pulse-echo ultrasonic image of a fingerprint sensor resolution test pattern fabricated by the National Institute of Standards and Technology (NIST; ), demonstrating a 5:1 contrast ratio over the 4.6 mm×3.2 mm ultrasound image.

Techniques:

Ultrasonic fingerprint sensor characteristics.

Journal: Microsystems & Nanoengineering

Article Title: Monolithic ultrasound fingerprint sensor

doi: 10.1038/micronano.2017.59

Figure Lengend Snippet: Ultrasonic fingerprint sensor characteristics.

Article Snippet: In each column’s TX cycle, five adjacent columns ( N −2, N −1, N , N +1, N +2) of 56 PMUTs are excited without beamforming, and the center column ( N ) is used as receivers. shows a 2D pulse-echo ultrasonic image of a fingerprint sensor resolution test pattern fabricated by the National Institute of Standards and Technology (NIST; ), demonstrating a 5:1 contrast ratio over the 4.6 mm×3.2 mm ultrasound image.

Techniques: Imaging