A method for measuring the internal diameters of transparent tubes
F H Rolt; R M Wilmotte; J S McPetrie; F H Rolt; National Physical Laboratory; R M Wilmotte; National Physical Laboratory; J S McPetrie; National Physical Laboratory
Журнал:
Journal of Scientific Instruments
Дата:
1929-12-01
Аннотация:
A method for measuring the internal diameters of transparent tubes employing two balls is described. Ellipticity and lack of parallelism may be detected and the ultimate limit of accuracy of measurement is determined by the accuracy to which the balls are spherical. A way of employing the method in the case of opaque tubes is suggested.
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