1955 年 24 巻 4 号 p. 147-150
Discussions are given on (1) under what condition the reflected multiple-beam interference fringes attain high contrast, and (2) if the condition is not fulfilled, how the contrast is weakened.
As for the definition of the width, instead of the customary width for one half of the maximum intensity, the width where the intensity becomes 1/2 (Imax+Imin) is proposed as it is not only more reasonable but also that the formula for the width becomes much simpler.