Apparatus for determining surface structures

Details Apparatus for determining surface structures Apparatus for determining surface structures

G - Physics

01

N

G01N 29/00 (2006.01) A61B 5/117 (2006.01) A61B 8/08 (2006.01) G01B 17/00 (2006.01) G01N 29/22 (2006.01) G01S 15/02 (2006.01)

Patent

CA 2120205

For determination of surface and special surface characteristics of an object, e.g. a fingerprint, the finger tip is placed on a convex surface of a support which is irradiated through a liquid or solid medium with spherical ultrasonic waves from a point source provided as a hole in a carrier for a ring of receiving transducers.

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