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An Improved Jamin Interferometer

1948; Optica Publishing Group; Volume: 38; Issue: 7 Linguagem: Inglês

10.1364/josa.38.000617

2375-1037

John B. Hawkes, R. Astheimer,

Mechanical and Optical Resonators

For the purpose of studying anomalies in the index-temperature relation of transparent liquids, a Jamin interferometer has been developed using special control equipment for accurate constant-rate temperature variation. Simultaneous recording of optical and thermal changes are made on a constant speed paper tape. An estimated precision of 0.7×10−6 index units per °C is to be compared with an actual reproducibility of 1 to 2×10−6 index units per °C.