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Abstract
Interferometry provides a measure of optical and not of geometrical path difference. In interferometric measurements of topography, optical inhomogeneities may therefore be misinterpreted as changes in micro-topography. An estimate of the magnitude of this effect shows that inhomogeneities in glasses may give rise to apparent height changes of 1 nm or more. This is significantly greater than the claimed sensitivities of interferometers now coming into use for the measurement of surface roughness, and experimental verification is called for.
This paper is based on a poster presentaion at the OPTICS '84 conference
This paper is based on a poster presentaion at the OPTICS '84 conference
Notes
This paper is based on a poster presentaion at the OPTICS '84 conference