No abstract

No abstract

A technique was devised for wavelength comparison with respect to the S6Kr standard. The apparatus used is described; it consists of an evacuated Fabry-PBrot interferometer with photoelectric detection. The essential feature is provision for scanning the projected interference pattern by a uniform rotation of a mirror. Sources of uncertainty are discussed. Vacuum wavelength values are given for the 86Kr secondary standards which are compared with other recent measurements. The wavelengths obtained agree with the adopted values within the allo\rable tolerances. Furthermore a first series of measurements of the wavelengths of two helium-neon lasers stabiliwd on the Lamb dip are reported.

No abstract

No abstract