METHOD FOR MEASURING THREE-DIMENSIONAL POSITION OF OBJECT BORDER Russian patent published in 2000 - IPC

Abstract RU 2157964 C1

FIELD: instruments, laser interference measurements. SUBSTANCE: method may be used for fast contactless measurement of three-dimensional position of object edges, and detection of deviation of edge from rectilinear shape. Method involves double acoustic-optical modulation of light beam. Primary acoustic-optical modulation using traveling reference acoustic pulse provides possibility to generate three-dimensional interference patterns as measuring band, one of which illuminates border of monitored object. Secondary acoustic-optical modulation, which is produced by traveling scanning acoustic pulse, provides possibility of recording, scanning of light beam, which passes edge of monitored object. Produced electric signal corresponds to three- dimensional position of object border and provides possibility to measure local shift of object border within measuring band. EFFECT: increased range and increased speed of measurements. 4 dwg

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RU 2 157 964 C1

Authors

Leun E.V.

Zagrebel'Nyj V.E.

Teleshevskij V.I.

Serebrjakov V.P.

Abdikarimov N.N.

Dates

2000-10-20Published

1999-08-03Filed