Method and means for utilizing apodized beams

Details Method and means for utilizing apodized beams Method and means for utilizing apodized beams

G - Physics

01

N

33/32, 73/58

G01N 21/17 (2006.01)

Patent

CA 1184779

Method and Means for Utilizing Apodized Beams Abstract Apodized beams of electromagnetic radiation are used in a transmissometer and earth motion detector. A laser beam which is apodized by a conical scanning means is transmitted from a device to a remote point where it is retroreflected to the device to provide measurements re- lating to the transmissivity of the physical environment. In a different application the conically scanned apodized laser beam is directed to a retroreflector which is then returned to the transmitting point. Relative movement between the transmitting point and the remote point are detected by the change in beam position with respect to the retroreflector. With several transmitters and receivers orientated at different propagation angles different rela- tive movement parameters are obtained. The conically scanned laser beam has substantially Gaussian intensity profile, but alternative symmetrical profiles of other electromagnetic radiation can be used.

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