NASA NTRS · 19710000502
Measuring internal dimensions of small transparent objects
Abstract
Technique individually photographs first the orifice in the transparent object and then a microscopic scale immersed in a liquid having the same index of refraction as the transparent object. Using a scale photograph, the orifice photograph is measured.
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Mills, S. M., Salmirs, S.. 1971-12-01. Measuring internal dimensions of small transparent objects. https://ntrs.nasa.gov/citations/19710000502
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