Archive of Medical Research

Diffractive grazing-incidence interferometer.
I propose a symmetric geometry for grazing-incidence interferometry of flat surfaces using diffraction gratings for beam splitting and recombination. The geometry employs a reference mirror to correct for relative inversion of the measurement and reference wave fronts. Preliminary testing with a 4-mum equivalent-wavelength system shows a 3varsigma repeatability of 20 […]

High-precision velocimetry: optimization of a fabry-perot interferometer.
We present the optimization of a Fabry-Perot velocimeter designed to measure speed at a few millimeters per second with a relative uncertainty of 10(-8). We focus on the accuracy and the optimization of the Fabry-Perot, with a review of the uncertainties related to the geometry, the […]