SPRING STAGE FOR MEASURING MULTIPLE SCATTERING OF PARTICLES IN A PHOTOGRAPHIC EMULSION

A description is given of the construction of a spring stage, having very low noise level (~ 0.01 to 0.03 mu ). The noise measurement occurring during ventical displacement of the objective was msde, as was the measurement of thermal noise due to non-uniform heating of various parts of the microscope. Steps to permit substantial reduction of the thermal noise are proposed.