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4 edition of Defocus measurement using a liquid crystal point diffraction interferometer found in the catalog.

Defocus measurement using a liquid crystal point diffraction interferometer

Defocus measurement using a liquid crystal point diffraction interferometer

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Published by National Aeronautics and Space Administration, National Technical Information Service, distributor in [Washington, DC], [Springfield, Va .
Written in English


Edition Notes

StatementCarolyn R. Mercer and Katherine Creath.
SeriesNASA technical memorandum -- 106687.
ContributionsCreath, Katherine., United States. National Aeronautics and Space Administration.
The Physical Object
FormatMicroform
Pagination1 v.
ID Numbers
Open LibraryOL17001220M
OCLC/WorldCa32189008

Revealing features of different optical shaping technologies by a point diffraction interferometer Nikolay Voznesenskiya, Mariia Voznesenskaiaa, Diwaker Jhaa, Heidi Ottevaereb, MałgorzataKujawińskac, Maciej Trusiakc, Kamil Liżewskic aDifrotec OÜ, Teaduspa Tartu, Estonia; bVrije Universiteit Brussel, Department of Applied Physics and Photonics, Brussels. Interferometry is a family of techniques in which waves, usually electromagnetic waves, are superimposed, causing the phenomenon of interference, which is used to extract information. Interferometry is an important investigative technique in the fields of astronomy, fiber optics, engineering metrology, optical metrology, oceanography, seismology, spectroscopy (and its applications to .

We propose a new point-diffraction interferometer (PDI) based on a pinhole filter made by a z-cut lithium niobate (LN) crystal. A thin aluminium layer with a circular opening is fabricated on the surface of the crystal by conventional photolithography and subsequent aluminium deposition and : M. Paturzo, S. Grilli, P. Ferraro. Abstract Not Available Bibtex entry for this abstract Preferred format for this abstract (see Preferences): Find Similar Abstracts.

  A lensless reflective point diffraction interferometer (LRPDI) is proposed for dynamic wavefront measurement. The point diffraction interferometer is integrated on a small substrate with properly designed thin film, which is used for generating the Cited by: 4. Journal of the European Optical Society - Rapid publications, Vol 10 () Simple quasi-common path point diffraction interferometer with adjustable fringe contrast and carrier frequency F. Z. Bai, Y. Miao, H. Guo, X. J. Gao, X. Q. Wang.


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Defocus measurement using a liquid crystal point diffraction interferometer Download PDF EPUB FB2

A new optical instrument, the liquid crystal point diffraction interferometer (LCPDI), is used to measure the temperature distribution across a heated chamber filled with silicone oil.

Defocus Measurement Using A Liquid Crystal Point Diffraction Interferometer Carolyn R. Mercer NASA Lewis Research Center, Cleveland, OH ph: fax: Katherine Creath Optical Sciences Center University of Arizona, Tucson, AZ.

Get this from a library. Defocus measurement using a liquid crystal point diffraction interferometer. [Carolyn R Mercer; Katherine Creath; United States.

National Aeronautics and Space Administration.]. A point diffraction interferometer (PDI) is a type of common-path an amplitude-splitting interferometer, such as a Michelson interferometer, which separates out an unaberrated beam and interferes this with the test beam, a common-path interferometer generates its own reference PDI systems, the test and reference beams travel the same or almost the same path.

Liquid-crystal point-diffraction interferometer for wave-front measurements Carolyn R. Mercer and Katherine Creath A new instrument, the liquid-crystal point-diffraction interferometer:LCPDI), is developed for the measurement of phase objects.

This instrument maintains the. A new instrument, the liquid crystal point diffraction interferometer (LCPDI) has recently been described.' The LCPDI is based on the point diffraction interferometer. 2,3 It is made from a thin liquid crystal layer sandwiched between glass plates, with an embedded microsphere serving as.

Liquid-crystal point-diffraction interferometer for wave-front measurements Carolyn R. Mercer and Katherine Creath Anew instrument, the liquid-crystal point-diffraction interferometer 1LCPDI2, is developed for the. Two-shot point-diffraction interferometer with an unknown phase shift Fuzhong Bai et al Journal of Optics 12 IOPscience.

Double-pass point diffraction interferometer Hagyong Kihm and Yun-Woo Lee Measurement Science and Technology 21 IOPscience. A fiber-diffraction interferometer using a coherent fiber optic taper.

The point diffraction interferometer (PDI) has long been used for the measurement of optical wavefronts for lens testing and fluid flow diagnostics. It was invented by Linnik, 1. Point diffraction interferometer with a liquid Mercer and K.

Creath, “Liquid-crystal point-diffraction interferometer,” Opt. Lett. 19(12), – etc. The Point Diffraction Interferometer (PDI) [3] is an in-line common path interferometer, thus more robust and compact, and that tolerates the use of.

We describe a novel interferometer design suitable for highly accurate measurement of wave-front aberrations over a wide range of wavelengths, from visible to x ray. The new design, based on the point diffraction interferometer, preserves the advantages of the conventional point diffraction interferometer but offers higher efficiency and improved accuracy through phase shifting.

Optical wavefront measurement using a novel phase-shifting point-diffraction interferometer | SPIE Newsroom: SPIE 5/16/12 PM ultraviolet phase-shifting point-diffraction interferometer: a wave-front metrology tool K.

Creath, Liquid-crystal point-diffraction interferometer for wave-front measurements, Appl. Opt. 35, pp.In this work a novel point diffraction interferometer based on a variable liquid crystal wave plate (LCWP) has been implemented.

The LCWP consists of a 3x3 cm2 monopixel cell with parallel alignment. The monopixel cell was manufactured such that the electrode covers the entire surface except in a centered circular area of 50 μm of diameter.

In the present paper, a point diffraction interferometer using an optical saturable absorber is proposed. In this system, the small dot is generated automatically on the film and the focal point is self-aligned.

We now consider a standard PDI consisting of a Fourier transform lens and a. CONICET Digital, el repositorio institucional del CONICET, un servicio gratuito para acceder a la producción científico-tecnológica de investigadores, becarios y demás personal del CONICET.

To overcome the accuracy limitation in traditional commercial interferometers, the phase shifting point diffraction interferometer (PPDI) has been developed for spherical surface figure measurement on a sub-nanometer scale, which applies a point aperture to generate a spherical wavefront as the ideal reference wavefront.

In the point Cited by: 1. We demonstrate a phase-shifting, point diffraction interferometer that achieves high accuracy and is capable of measuring a single pulse of light.

The measurement system utilizes a polarizing point diffraction plate to generate a synthetic reference beam that is. Defocus measurement using a liquid crystal point diffraction interferometer: OSA Optical Fabrication and Testing Workshop Digest: interferometry: Book Section: C.

Mercer, and K. Creath: Defocus measurement using a liquid crystal point diffraction interferometer, NASA technical memorandum NASA technical memorandum 1. Introduction. Interferometric phase microscopy (IPM) is a powerful label-free tool for studying biological specimens, surface measurements, and micro structures.In order to obtain phase distribution of the specimen, many IPM optical geometries have been proposed over the years, including common-path geometries and separated-path by: 8.

The plate of the PDI has a micro-hole and transmittance of less than 10%. The experimental setup consists in a He-Ne laser illuminating a spatial filter, a collimated beam is produced by an achromatic lens, and close to the focal point of a second lens (focusing lens), the plate of the Point Diffraction Interferometer is : E.

Rueda-Soriano, F. Granados-Agustín, A. Cornejo-Rodríguez, Elizabeth Percino-Zacarías, P. Cebri. A phase-shifting point diffraction interferometer (PS/PDI) with point sources of two single mode optical fibers has been developed, which will be appropriate for the surface figure measurement of large aperture optics on a sub-nanometer by: 8.Interferometric method for phase calibration in liquid crystal spatial light modulators using a self-generated diffraction-grating José Luis Martínez Fuentes,1,2,3 Enrique J.

Fernández,2 Pedro M. Prieto,2 and Pablo Artal2 1Instituto de Investigación en Óptica y Nanofísica, Laboratorio de Óptica, Universidad de Murcia, Edifi Campus de Espinardo, Murcia, SpainFile Size: 3MB.Author(s): Estey, Brian Vincent | Advisor(s): Mueller, Holger | Abstract: We experimentally and theoretically study Bragg diffraction as a tool for large-momentum transfer beam splitters in atom interferometry.

A theoretical framework is developed to quantify the diffraction phase systematic caused by Bragg diffraction and experiments are performed to confirm these predictions using a Ramsey Cited by: 1.