Paper
19 July 1996 New type of common-path heterodyne profilometer
Jinjin Li, Yang Zhao, Dacheng Li
Author Affiliations +
Abstract
A new type of non-contact heterodyne profilometer with annular lens is described in this paper. The surface can be measured without the separated reference surface. The theoretical lateral resolution of this system becomes much higher of 1 m. The optical structure is easy to set up.
© (1996) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jinjin Li, Yang Zhao, and Dacheng Li "New type of common-path heterodyne profilometer", Proc. SPIE 2861, Laser Interferometry VIII: Applications, (19 July 1996); https://doi.org/10.1117/12.245176
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KEYWORDS
Heterodyning

Profilometers

Signal detection

Interferometers

Surface roughness

Beam shaping

Radium

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