Digital holography enables quantitative phase imaging based on interference. A digital
hologram often encodes the phase information along with aberrations or deformations. This …

Phase unwrap** is a crucial process to obtain the absolute phase profile in many optical
phase measurement techniques such as interferometry, holography, profilometry, etc. In this …

Among the six degrees of freedom for a moving body, measuring roll angle is the most
difficult. In this study, a noncontact, no-imaging dynamic roll angle measurement system …

Temperature-induced deformation in the infrared detector chip is a key index for evaluating
image aberration and stress concentration. Development of an evaluation means for …

The laser speckle correlation method has found widespread application for obtaining
information from vibrating objects. However, the resolution and accuracy of the laser speckle …

This paper describes a dual-directional shearography system to address the issue of two-
dimensional characterization of the surface strain. A common-path configuration coupled …

An approach to precise measurement of small roll angle based on digital speckle pattern
interferometry (DSPI) is introduced. A simple relationship between the roll angle and …

A real-time, dual-sensitive shearography system using a single-wavelength laser was
developed for simultaneous and dynamic in-plane and out-of-plane strain measurements …

Differential interference contrast (DIC) microscopy is highly desirable in label-free imaging
for transparent biological samples. It avoids potential photobleaching and phototoxicity from …

Denoising of electronic speckle pattern interferometry (ESPI) fringe patterns with variable
density is challenging. In this paper, we present a method to denoise ESPI fringe patterns …