| 摘要 |
FIELD: physics. ^ SUBSTANCE: device has a laser beam source, a transmitting element in form of a tube placed on the path of beam and filled with air at atmospheric pressure, and a recording unit. On both ends of the tube there are optically transparent end caps which reduce uncertainty of the spatial coordinates of the axis of the beam at the output of the tube. The tube with end caps acts as a high-Q cavity resonator and under the effect of external broad-band (white) noise, a standing wave having natural frequency and overtones is initiated in the tube, under the effect of which equalisation of optical refraction coefficients of air inside the tube takes place. ^ EFFECT: maximum spatial localisation of the laser beam to enable its use as an extended coordinate axis. ^ 1 dwg, 1 tbl |
