SENSOR AND IMAGE SYSTEM FOR REMOTE OBJECT DETECTION

摘要

PROBLEM TO BE SOLVED: To provide a simple sensor which performs remote measurement of the position and/or shape of an object when it is placed in a diffusive medium. SOLUTION: The sensor includes: a light source 110 having shorter coherence length with respect to the distance between the sensor and the object; a beam splitter 112 for splitting a sent beam into an incident beam 126 and a standard beam 123; a photorefractive crystal glass 114 for generating a hologram when receiving the interference between the standard beam 123 and a beam 127 reflected by the object 120 irradiated with the incident beam 126 and reproducing the hologram through a diffraction beam 124 sent back from the crystal glass through anisotropic diffraction by the action of the standard beam 123; and a detector 116 for generating information when receiving the diffraction beam 124. The detector 116 receives only the diffraction beam 124 from the crystal glass. COPYRIGHT: (C)2010,JPO&INPIT