In the last 30 days

• Open/close Long-baseline Michelson interferometry with large ground-based telescopes operating at optical wavelengths. I. General formalism. Interferometry at visible wavelengths

  F Roddier and P Lena 1984 J. Opt. 15 171 Tag this article

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  Long baseline Michelson interferometry is envisaged with large ground-based telescopes operating at visible or infrared wavelengths. The ability of the method to provide accurate visibility measurements, in spite of variable seeing conditions, is discussed. Several operating modes are considered and limiting magnitudes are evaluated in each case. Performances are found to improve slowly with the aperture diameter and are found to be extremely sensitive to seeing conditions. In spite of the tremendous gain expected from Space observations, the potential of ground-based interferometry remains high. The authors treat the general formalism and analyse the case of visible wavelengths ( lambda <or approximately=0.9 mu m).

• Open/close Scattering of a Gaussian beam by a Mie scatter center using a Bromwich formalism

  G Gouesbet et al 1985 J. Opt. 16 83 Tag this article

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  A formalism using Bromwich scalar potentials is given to compute the properties of the light scattered by a Mie scatter center illuminated by a Gaussian beam. Formulae are established for the intensities, phase angle, cross-sections and efficiency factors, and radiation pressure.

• Open/close Conical diffraction mounting generalization of a rigorous differential method

  E Popov and L Mashev 1986 J. Opt. 17 175 Tag this article

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  A generalization of the method of J. Chandezon et al. (1982) is presented for conical diffraction mounting. The applicability of the invariance theorem for real metal and dielectric gratings is discussed and the existence of some polarization effects is demonstrated. A formulation of the reciprocity theorem in conical diffraction mounting is proposed, valid not only for the efficiencies of the diffracted orders but for the amplitudes, too.