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Sunday, July 5, 2020 | History

3 edition of Holographic interferometry with an injection seeded Nd:YAG laser and two reference beams found in the catalog.

Holographic interferometry with an injection seeded Nd:YAG laser and two reference beams

Holographic interferometry with an injection seeded Nd:YAG laser and two reference beams

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  • 25 Currently reading

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

    Subjects:
  • Holographic interferometry.,
  • Lasers in astronautics.

  • Edition Notes

    StatementArthur J. Decker.
    SeriesNASA technical memorandum -- 102056.
    ContributionsUnited States. National Aeronautics and Space Administration.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL15294159M

    An illustration of an open book. Books. An illustration of two cells of a film strip. Video. An illustration of an audio speaker. Audio. An illustration of a " floppy disk. Software. An illustration of two photographs. Images. An illustration of a heart shape Donate. An illustration of text ellipses. Search the leading research in optics and photonics applied research from SPIE journals, conference proceedings and presentations, and eBooks.

    ultrafast laser laser beam x-ray detector pulse picker MCP detector Pyroelectric aspherical mirror femto-neutron tube infrared illumination BGO crystal quartz DPSS laser IR-sensitive IR viewers ZnSe optics Diffraction Grating femtosecond fiber laser femtosecond femtosecond meniscus lens interferometer Pyroelectric Effect Pyroelectric Crystal. Holographic techniques that can record both the phase and amplitude of the light reflected by a diffusely scattering object can be used to generate a true, three-dimensional image.1 Holograms were originally demonstrated by Dennis Gabor in the late s, but significant interest and application of holography did not occur until the s when a convenient source of coherent radiation, in the.

    A Nd: YAG laser emitting in the third harmonic at a wavelength of nm and a pulse duration of 10 ns has been used as energy source. Nanostructures are made by varying the number of pulses typically from to using about mJ as output laser energy and focused in a spot of 1 mm in diameter in the corresponding target. Get Price. combine the light beams with no effect of the diffractions from the cube edges. It is worth highlighting that the coherence length of pulsed Nd:YAG lasers with no injection seeding is usually in the order of 10 mm. Hence, it is very important to set up the reference and the object optical lines very carefully.


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Holographic interferometry with an injection seeded Nd:YAG laser and two reference beams Download PDF EPUB FB2

An injectionseeded Nd:YAG laser and dual-reference-beam holographic interferometry have been used at Lewis Research Center for crack detection in a composite subjected to high cycle by: 9. The performance of twin injection seeded Nd:YAG lasers is compared with the performance of an argon-ion laser for recording dual-reference-beam holograms in Agfa 8E56 emulsion.

Optical heterodyning is used to measure interference and the results are expressed in terms of heterodyning signal level and intensity signal to by: 9. The performance of twin injection seeded Nd:YAG lasers is compared with the performance of an argon-ion laser for recording dual-reference-beam holograms in AGFA 8E56 emulsion.

Optical heterodyning is used to measure interference, and the results are expressed in terms of heterodyning signal level and intensity : Arthur J. Decker. proposed optical configuration which adopts a Nd:YAG pulsed laser of nm wavelength as the light source and uses an iron-doped lithium niobate crystal as the recording media for holographic recording of an un- deformed specimen is presented.

Dual-reference holographic interferometry with a double pulsed laser Guanming Lai, Toyohiko Yatagai (Applied Optics ) Holographic interferometry with an injection seeded Nd:YAG laser and two reference beams Arthur J.

Decker (Applied Optics ). An analysis of holographic interferometry using two reference beams to record and reconstruct the two interfering light fields independently is carried out. The multiplicity of reconstructions is discussed. Guidelines for the recording setup are derived to separate the wanted from the unwanted reconstructions.

The influence of misalignment of hologram and reference waves on the fringe pattern. Some major goals of structural testing are the detection of local damage and, more recently, the general evaluation of structural health.

Detection of local damage calls to mind several specialized. A twin oscillator, injection-seeded, pulsed Nd:YAG laser is incorporated into a pulsed TV holography set-up.

With orthogonal polarisation and double pulsing of each of the two channels of the laser, four pulses are recorded on two separate CCD-frames. Get this from a library. Holographic interferometry with an injection seeded Nd:YAG laser and two reference beams. [Arthur Decker; United States.

National Aeronautics and Space Administration.]. Application of holographic interferometry for plasma diagnostics A N Zaidel'-Recent citations injection-seeded Nd:YAG laser (Spectra-Physics GCR probing beams.

These additional beams disturbed the final interference pattern, so the first polarizer P 1 was introduced. The experimental arrangement for our holographic interferometry measurements consists of an injection seeded Nd:YAG laser providing light at nm with a pulse duration of about 10 ns operating at 10 Hz.

Example INDI Nd:YAG laser (Spectra-Physics) INDI is a relatively compact Nd:YAG laser which can be used e. in flash–photolysis experiments for sample excitation (see Chapter 7). It generates 5–8 ns pulses at, and nm with pulse energies, and 55 mJ respectively.

The pulse repetition rate is 10 Hz. A twin oscillator, injection-seeded, pulsed Nd:YAG laser is incorporated into a pulsed TV holography set-up. With orthogonal polarisation and double pulsing of each of the two channels. The need for interferometry knowledge has crossed the boundaries of engineering fields and Dr.

Hariharan has written a book that answers the questions that new practitioners to interferometry have and haven't even thought of yet. This new edition includes complete updates of all material with an emphasis on applications.

two reference beams and record the three interferograms necessary to calculate the phase injection seeded twin systems with time delays that can go up to I ms should be selected.

Because this system As the Nd:YAG lasers used for holographic interferometry usually have both lasers working. Electronic heterodyne moire deflectometry and electronic heterodyne holographic interferometry are compared as methods for the accurate measurement of refractive index and density change distributions of phase object p.

Experimental results are presented to show that the two methods have comparable accuracy for measuring the first derivative of the intE-ferometric fringe shift. Interferometry XIII: Techniques and Analysis. Editor(s): Dispersive interferometry using femtosecond pulse laser for measuring refractive index and physical thickness of test samples Nonlinear interference of two successive coherent anti-Stokes Raman scattering signals for.

The performance of twin injection seeded Nd:YAG lasers is compared with the performance of an argon-ion laser for recording dual-reference-beam holograms in AGFA 8E56 emulsion.

Optical heterodyning is used to measure interference, and the results are expressed in terms of heterodyning signal level and intensity signal-to-noise. A pulsed multiple colour laser system is disclosed having particular application for incorporation into a digital holographic printer for producing RGB colour reflection holograms.

A Nd:YLF crystal 1 in a laser cavity is excited to produce an emission at nm which is frequency converted by doubling to nm and by tripling to nm. A direct write holographic printer for producing RGB color reflection holograms is disclosed.

A Nd:YLF crystal (1) in a laser cavity is excited to produce an emission at nm which is frequency converted by doubling to nm and by tripling to nm.

In a separate cavity a similar Nd:YLF crystal (1 a) is synchronously or asynchronously excited to produce an emission at nm. Holographic interferometry as a method to detect welding failures on ribbed iron structures [] A review on self-reference wavefront methods in optical testing (Plenary Paper) [] print version.

End-side-pumped Nd:YAG solar laser with four Fresnel lenses [] Galinhas, B. / Liang, D. / International Commission for.The acoustic frequency is kHz and the wavelength is experimentally found to be mm.

Experiments with a Pulsed Laser The high-power pulsed-laser holographic interferometry re- cording system is shown in Fig. The laser used is a Q-switched, frequency-doubled Nd:YAG laser with a pulse length of 5 ns.Two-dimensional map of gloss of plastics measured by diffractive-element-based glossmeter.

Measurement of microthermal deformations in an optical pick-up base using holographic interferometry. Carbon monoxide, Thermal modeling, Temperature metrology, Plasma, Absorption, Laser processing, CCD cameras, Interferometry.