Results 211 to 220 of about 1,754 (255)
De-coherent parallel laser processing of ultradense nanopores for high-density, large-area 3D optical phase encoding. [PDF]
Nat CommunJiang Z +6 more
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Real-time dispersion compensation in scanning interferometry
Optics Letters, 2002 We propose and demonstrate a method of real-time dispersion compensation suitable for scanning interferometry and optical coherence tomography. Static grating tilt in a scanning frequency-domain optical delay line is shown to produce dispersion that is linearly proportional to scan position, and we use this property to achieve depth-dependent ...
Smith, E. D. J. +2 more
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Single-shot dispersive interferometry for inline surface inspection
, 2023 The dispersive interferometry provides an instantaneous surface measurement in a single camera frame, making it resistant to environmental disturbances and ideal for in-process surface metrology.
Dawei Tang +2 more
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Absolute distance measurement by dispersive interferometry using a femtosecond pulse laser [PDF]
Optics Express, 2006 We describe an interferometric method that enables to measure the optical path delay between two consecutive femtosecond laser pulses by way of dispersive interferometry.
Ki-Nam Joo, Seung-Woo Kim
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Dispersion compensation in stellar interferometry
Applied Optics, 1996In long-baseline stellar interferometry, spectrometers are used to disperse starlight for measuring visibility at multiple wavelengths and for fringe tracking with channeled spectra. However, neither prisms nor gratings are well suited to the observation of fringes with wide spectral bandwidths because the mapping from wave number to detector ...
P R, Lawson, J, Davis
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Refractometric low coherence interferometry: dispersion interferometry
SPIE Proceedings, 2005Primarily, low-coherence interferometry yields the optical length, i. e. the product of sample length or sample depth data times the complementary sample refractive index. Each quantity, refractive index as well as sample depth can be obtained from the optical length if the complement is known.
M. Bagherzadeh +4 more
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Chromatically dispersed interferometry with wavelet analysis
Optics Letters, 2006A new white-light interferometry point sensor utilizing a chromatically dispersed depth detection field is addressed. Monitoring the interference in the optical frequency domain allows for microscopic height detection without the necessity of a mechanical axial scan.
Evangelos, Papastathopoulos +2 more
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Measurement of the influence of dispersion on white-light interferometry
Applied Optics, 2004White-light interferometry is a well-established method for measuring the height profiles of samples with rough as well as with smooth surfaces. Because white-light interferometry uses broadband light sources, the problem of dispersion arises. Because the optical paths in the two interferometer arms cannot be balanced for all wavelengths, the white ...
Pavel, Pavlicek, Jan, Soubusta
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Phase retrieval algorithm for line-scan dispersive interferometry [PDF]
, 2018 The line-scan dispersive interferometry (LSDI) benefits from single-shot measurement in nature and has potential to perform in-line surface metrology. In this technique, the interference beam produced by the two arms of the interferometer is spatially ...
Dawei Tang, Feng Gao, Xiangqian Jiang
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Dispersion in stellar interferometry
Applied Optics, 1990The effects of uncompensated dispersion on the fringe visibility in a two beam interferometer are examined for a long baseline stellar interferometer with a path compensator in air rather than in vacuo. We derive a criterion based on the central fringe visibility for evaluating the effects of dispersion and develop a method for selecting suitable ...
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