Dispersion quality measurement and particulate magnetic coating properties

Two dual-beam differential direct-phase-detecting optical interferometers for scanning moving surfaces are described. Two beams from these interferometers are focused ~42 mum apart on moving surfaces, and the difference in their reflected path lengths is measured to provide the surface roughness measurement. These interferometers are exceptionally insensitive to environmental vibrations and to surface physical and chemical factors. Applications discussed include the measurement of the surface roughness of a rotating cylinder and a moving web.

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Vibration-resistant direct-phase-detecting optical interferometers

Carlson

Denzer

Greenlee

et al. 1997

Appl. Opt.

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Dispersion quality measurement and particulate magnetic coating properties

Cited by 1 publication

References 18 publications

Vibration-resistant direct-phase-detecting optical interferometers

Vibration-resistant direct-phase-detecting optical interferometers

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