Rainbow holographic interferometry

Incoherent Holographic Interferometry

In-line digital holographic interferometry.

An optical system based on in-line digital holography for the evaluation of deformations is described. In-line holograms are recorded on a CCD chip. The problem of overlapping twin images typical for the in-line arrangement is solved by digital reconstruction and filtering of the unwanted wave fronts. Two separate interferograms of an object under test in its undeformed and deformed states are ...

Color Holographic Interferometry (from Holographic Plates to Digital Holography)

ABSTRACT: We propose to detail a comparison of optical non invasive techniques using panchromatic holographic plates and digital holography for analyzing unsteady wake flows. Few years ago, ONERA developed optical methods based on real-time three-wavelength holographic interferometry using transmission and reflection holographic plates. These techniques combine the advantages of differential in...

Quantitative phase analysis in electron holographic interferometry.

Holographic interferometry in an electron microscope and its phase analysis technique are described. The fringe scanning method is used to gain high sensitivity in phase detection. An example of measuring a magnetic field of a fine particle is presented. The measurement accuracy for median filtering is about 1/70 fringe corresponding to the magnetic flux sensitivity of 6 x 10(-17) Wb. Noise red...

Holographic diversity interferometry for optical storage.

This study proposes holographic diversity interferometry (HDI), a system that combines information from spatially dispersed plural image sensors to reconstruct complex amplitude distributions of light signals. HDI can be used to generate four holographic interference fringes having different phases, thus enabling optical phase detection in a single measurement. Unlike conventional phase-shiftin...