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  • Passive (cooperative) hologram radar
    Real-time read-out can also be achieved by successivelysampling the array elements and introducing their outputs into an ultrasonic cell which, by virtue of the Debye - Sears effect, can modulate (diffract) a co- herent light beam in almost the same way...
  • Time-optimal control of sampled-data systems
    Real-time read-out can also be achieved by successivelysampling the array elements and introducing their outputs into an ultrasonic cell which, by virtue of the Debye - Sears effect, can modulate (diffract) a co- herent light beam in almost the same way...
  • Handbook of Optics: Volume I - Geometrical and Physical Optics, Polarized Light, Components and Instruments, Third Edition > OPTICAL SPECTROMETERS
    The ultrasonic Debye - Sears modulator overcomes the experimental difficulties associated with both Pockel cells and Kerr cells.
  • Analytical bulletin of the Committee of Coordination of the Telecommunications of the French Union
    -- Use of the device exp6rimental of Debye - Sears ; the mat6riau as plate of 6 paisseur comprised between... ...darts plac6 a cetlule that is frapp6e by the ultrasonic ray ~ m-nement and one orients the cell of fa(~on fl...
  • A modified flap-type vacuum valve
    It is known that unlike the conditions which apply in an ordinary light grating, the diffraction pattern produced by a Debye - Sears ’ optical cell is clear and visible only when the light wave front is normal to the sound beam. This fact can be taken advantage of for the accurate determination of ultrasonic velocities. . v/ . liquids. . workshop...
  • A method for comparing ultrasonic velocities in solids and liquids using a spectrometer
    It is known that unlike the conditions which apply in an ordinary light grating, the diffraction pattern produced by a Debye - Sears ’ optical cell is clear and visible only when the light wave front is normal to the sound beam. This fact can be taken advantage of for the accurate determination of ultrasonic velocities. . v/ . liquids. . workshop...
  • A gas introductor for a vacuum system
    It is known that unlike the conditions which apply in an ordinary light grating, the diffraction pattern produced by a Debye - Sears ’ optical cell is clear and visible only when the light wave front is normal to the sound beam. This fact can be taken advantage of for the accurate determination of ultrasonic velocities. . v/ . liquids. . workshop...
  • Chemical kinetics
    A particularly easy ultrasonic absorption experiment to understand and perform is the laser Debye - Sears technique. ...a quartz piezoelectric transducer into a 30-ml (1.83-in.3) sample cell that has entrance...
  • Some Elastic Properties of Organic Glasses in the Transition Region from Solid to Liquid at Ultrasonic Frequencies
    ...their fundamental thickness mode were transmitted to the organic glass in a silicate cell through a thin... The optical arrangement was the same as that adopted by Debye and Sears (1932) and Lucas and Biquard (1932) using a mercury vapour lamp fitted with a green filter to giye a monochromatic beam of wavelength h=5461A. The diffraction images produced by the ultrasonic 'grating' \\ere photographed and the distance dp between the pth...
  • An Optical Technique for Simultaneous Beamforming and Cross-Correlation
    If it is desired to process in real time, an ultrasonic de- vice such as a water cell may be used in place of the film. The Debye - Sears effect' produces a result similar to that obtained using optical transmissivity modulated film.