光波干渉法による1メートルまでのブロックゲージの測定について

抄録

A brief description is given of a gauge interferometer which measures lengths of up to 1 m in terms of wavelength of light.
Isotopic light sources containing mercury 198 and Krypton 86 as well as natural cadmium, are used in the interferometer. To measure the refractive index of air by interferometry, a vacuum chamber is set in the optical system with the block gauge to be measured. The main parts of the interferometer is set in constant temperature apparatus. The accuracy of this gauge interferom eter is found to be 0.02O.03 μ in 1 m length.