The Institute of Physics ( IOP ) по журналам "Journal of Optics"
Отображаемые элементы 1-20 из 872
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(1977-11-01)A record of the surface wave of optical systems is obtained directly without ambiguity of sign. From the setting proposed by Keilmann (1970) two variants of a same principle have been tested: a method by optical path ...
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(1997-04-01)Based on the structure of substrate-mode holograms, a new type of 1-to- optical fan-out module which consists of two layers of grating arrays for optical interconnects is presented. The first and second layer have a grating ...
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(1981-11-01)By using MgO and MgF2 as high and low refractive index materials respectively and adapting metal-induced filter structures and transparent silicon gum as adhesive agent, 2200-2600 AA ultra-violet interference filters with ...
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(1986-05-01)A 2D achromatic correlator working in polychromatic light or with broadband illumination is demonstrated. It consists of two achromatic Fourier transformers combining zone plates set in cascade in order to cancel out ...
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(1979-11-01)The solar disc was scanned at 8 and 13 mm using the computer controlled 22 m radio telescope of Simes. A radial shift invariant Wiener filter was applied to restore the measured matrix and improve the image. The problems ...
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(1979-11-01)The first observations of speckled images of alpha -Orionis as obtained at the Cassegrain focus of the 193-cm telescope of the Haute Provence Observatory using an IR-TV camera are presented. The specific nature of the 2 ...
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(1987-01-01)A method of optical profilometry by phase measurement with a CCD array sensor is applied to the study of cavitation erosion phenomenon. 3D data extracted from the impact patterns yield the extracted matter volume, the main ...
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(1989-11-01)After a review of fundamental definitions in binocular vision-binocular convergence, retinal disparity and their perceptual correlates (fusion, diplopia, suppression and stereoscopic depth)-psychophysical data on Panum's ...
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(1995-01-01)Analysing the polarization state of reflected beams in a vision system provides essential informations concerning the observed surface orientations. In this paper, we present an original 3-D surface reconstruction method ...
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(1997-02-01)Starting from the colour-matching functions measured by Stiles - Burch for a 2° visual field and ten individual observers, published by Trezona we have discussed certain differences between this dataset and the CIE 1931 ...
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(1992-07-01)Using the Kirchhoff integral, the generalized ABCD propagation law for general astigmatic Gaussian beams through misaligned optical systems is derived. The commonly used q-parameter describing the stigmatic Gaussian beam ...
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(1981-11-01)The spectrograph produced consists of a monograph grating, stimagnetic along the entrance slit height, and a vidicon tube. The instrument is used to record the spatial intensity distribution of lines in the spectral range ...
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(1982-09-01)The conditions of a black body can be realized in a cavity made of a material of high emissivity which is as isothermal as possible, and with an outlet sufficiently small that its presence affects as little as possible the ...
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(1989-03-01)In the frame of the activities of the French Optical Society's club Optics in Computers , a meeting was held in Institut d'Optique, Orsay, on May 3rd 1988. Ideas discussed are presented here, giving to optics a head ...
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(1998-06-01)In this paper, a theoretical analysis of a sensor which uses a self-mixing interference effect inside a microchip laser is reported. Experimentally, the FMCW approach has been implemented by using both a Nd:YAG microchip ...
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(1991-01-01)An interferometric device for measuring absolute distance is described. A frequency-modulated laser diode is used as the light source. At the output of a Michelson interferometer a beat signal is detected-a process which ...
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(1998-06-01)A measurement technique is proposed based on dispersive interferometry using a comb-spectrum source: dispersive comb-spectrum interferometry (DCSI). The configuration proposed processes the Michelson interferometer output ...
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(1998-06-01)This paper describes the principle and design of a first prototype of an absolute distance interferometer using a variable synthetic wavelength. The major components of the prototype are two piezoelectrically tunable diode ...
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(1991-05-01)Refractive index measurements of air and pure gases have been carried out by using laser heterodyne interferometry. Measurement accuracy better than a few parts into 107 for refractive index of gases, is reported. This is ...
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(1981-03-01)Presents a method for cinematographically recording the retinal image of a point source to allow the study of the instantaneous image as well as the changes caused by the microfluctuations of the accommodation. The method ...
Отображаемые элементы 1-20 из 872