G - Physics – 02 – B
Patent
G - Physics
02
B
354/29
G02B 6/10 (2006.01) G01J 1/42 (2006.01) G01J 9/00 (2006.01) G01M 11/00 (2006.01) G01R 29/08 (2006.01) H04B 17/00 (2006.01)
Patent
CA 1214556
ABSTRACT The value of a transverse moment of any order of the electromagnetic field associated with an optical beam (and in particular the spot size of such a beam) is deter- mined by two successive measurements of the optical power of the beam: one measurement is a direct measurement, whilst the other is effected after spatially modulating the transverse distribution of the electromagnetic field by a factor proportional to the n-th power of the trans- verse coordinate of the beam, n being the moment order. The moment can be obtained from the ratio between the two measurements. The invention also includes apparatus for carrying out the method.
466723
Coppa Gianni
Di Vita Pietro
Rossi Umberto
Otc - Optical Technologies Center S.r.l.
Ridout & Maybee Llp
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