Common-path interferometer with four simultaneous phase-shifted interferograms using ronchi grating and cube beamsplitter

TL;DR: A common-path parallel-quadrature on-axis phase-shifting interferometry using a modified Michelson configuration with a polarizing cube beam splitter is proposed for quantitative phase measurement.

TL;DR: In this paper, a general algorithm based on Lissajous figures and ellipse fitting is proposed for extracting the phase distribution from a set of phase-shifting interferograms with random noise.

TL;DR: This paper presents a two-shot common-path phase-shifting interferometer that consists of a 4f optical system with two windows in the input plane and a Ronchi grating in the Fourier plane, and generates two adjacent interferograms using only diffraction orders 0 and +1 and 0 and -1.

TL;DR: In this paper, a single-shot phase-visibility modulating interferometry (SVMIM) method was proposed to achieve phase visibility modulation in a 4f optical system with three apertures at the input and a grid with a fill factor of 1/2 at the Fourier plane.

TL;DR: The system has been designed to optimize the collection of data to give higher than usual accuracy in measuring the individual elements and final performance of assembled diffraction limited optical systems, and furthermore, the short loop time of a few minutes makes the system an attractive alternative to constraints imposed by test glasses in the optical shop.

TL;DR: In this article, a self-scanned 1024 element photodiode array and a minicomputer are used to measure the phase (wavefront) in the interference pattern of an interferometer to lambda/100.

TL;DR: A digital wavefront measuring interferometer for testing optical surfaces and lenses measures wavefronts with high accuracy and speed.

TL;DR: An experimental setup for optical phase extraction from 2-D interferogram extraction using a one-shot phase-shifting technique able to achieve four interferograms with 90 degrees phase shifts in between is presented.