J
James C. Wyant
Researcher at University of Arizona
Publications - 147
Citations - 7750
James C. Wyant is an academic researcher from University of Arizona. The author has contributed to research in topics: Interferometry & Astronomical interferometer. The author has an hindex of 46, co-authored 146 publications receiving 7384 citations. Previous affiliations of James C. Wyant include Goddard Space Flight Center.
Papers
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Basic Wavefront Aberration Theory for Optical Metrology
James C. Wyant,Katherine Creath +1 more
TL;DR: Sign Conventions Aberration Free Image Spherical Wavefront, Defocus, and Lateral Shift Angular, Transverse, and Longitudinal Aberration Seidel Aberrations A. Spherical Aberration B. Coma C. Astigmatism D. Field Curvature E. Distortion Zernike Polynomials and Third-Order Aberrations as mentioned in this paper.
Two-wavelength phase-shifting interferometry (A)
Yeou-Yen Cheng,James C. Wyant +1 more
TL;DR: A technique that combines ideas of phase shifting interferometry (PSI) and two-wavelength interferometer (TWLI) to extend the phase measurement range of conventional single-wa wavelength PSI is described.
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Two-wavelength phase shifting interferometry.
Yeou-Yen Cheng,James C. Wyant +1 more
TL;DR: In this article, a technique that combines ideas of phase shifting interferometry (PSI) and two-wavelength interference (TWLI) to extend the phase measurement range of conventional singlewavelength PSI is described.
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Multiple-wavelength phase-shifting interferometry
Yeou-Yen Cheng,James C. Wyant +1 more
TL;DR: By introducing the phase data of a third wavelength, one can measure the phase of a very steep wave front and the repeatability of the measurement is better than 25-A rms (λ = 6328 A).
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Use of an ac heterodyne lateral shear interferometer with real-time wavefront correction systems.
TL;DR: An analysis shows that for uniform circular or square sources larger than a derived minimum size, the wavefront measurement accuracy depends only upon the radiance of the source and not upon the angular subtense of the sources.