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1. (WO1999012009) LASER INTERFEROMETER

Pub. No.:    WO/1999/012009    International Application No.:    PCT/GB1998/002601
Publication Date: Mar 11, 1999 International Filing Date: Aug 28, 1998
IPC: G01J 9/02
Applicants: BRADFORD PARTICLE DESIGN PLC.
SHEKUNOV, Boris, Yu
Inventors: SHEKUNOV, Boris, Yu
Title: LASER INTERFEROMETER
Abstract:
The present invention provides a laser interferometer including: laser means (1) for provision of two light pulses separated by a time interval; phase modulator means (2) including means for: splitting each pulse into a pair of sub-pulses, each sub-pulse of each pair being directed along a respective separate path, directing the sub-pulses in one of the paths through or onto a sample to be investigated, and subsequently recombining the respective pairs of sub-pulses; and signal decoder means (3) for directing the recombined pulses via respectively separate paths onto respective light sensitive devices or respective locations of a light sensitive device.