ルビーレーザーの空間的コヒーレンス
1965 年 34 巻 9 号 p. 642-647
詳細
1965 年 34 巻 9 号 p. 642-647
Direct measurements of spatial coherence of ruby laser beam show that, it is not fully coherent als is generally assumed to be, but is partially coherent. From the relation obtained experimentally betweens they directionality and coherence of laser beam, the light beam, from a usual ruby laser is, found equivalent to that from a spatially incoherent light source situated at infinity. From this correspondence, spatial coherence on the emission surface of laser light cans be calculated by the Fourier transform of the intensity distribution on far-field patterns. This matter is experimentally ascertained.
