Zobrazeno 1 - 10
of 24
pro vyhledávání: '"Y. Belvaux"'
Autor:
S. Lowenthal, Y. Belvaux
Publikováno v:
Applied optics. 10(3)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c81b5f3649624f021304dfa8332b4fba
https://pubmed.ncbi.nlm.nih.gov/20094517
https://pubmed.ncbi.nlm.nih.gov/20094517
Publikováno v:
Optics Communications. 15:76-79
In this paper, gamma ray imaging using Fresnel zone plates is studied. We show that an M.T.F. can be associated with the coding—decoding process giving an evaluation of the final image quality. An experimental result corroborates the theoretical st
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f3892ef8193ddf729e34e05a8568b3a8
https://doi.org/10.1016/0030-4018(75)90187-x
https://doi.org/10.1016/0030-4018(75)90187-x
Publikováno v:
Nouvelle Revue d'Optique. 7:33-39
After having discussed the principle of the technique for subtraction of illuminance, based on the use of image holograms, we describe a device employing a Savart plate, placed between an analyser and a polarizer, which enables subtraction directly f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1e42a2a6c1f7b8bac6eb1b79096926c6
https://doi.org/10.1088/0335-7368/7/1/303
https://doi.org/10.1088/0335-7368/7/1/303
Autor:
Y Belvaux
Publikováno v:
Nouvelle Revue d'Optique. 6:137-147
This paper deals with the influence of emulsion thickness and absorption as well as the different recording parameters when reconstructing an hologram. The hologram of a plane wave recorded with a parallel reference beam is a set of equidistant layer
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::96d947021488d754deb9b08104bed2b7
https://doi.org/10.1088/0335-7368/6/3/302
https://doi.org/10.1088/0335-7368/6/3/302
Publikováno v:
Optics Communications. 5:143-147
Resume A method using a birefringent prism to subtract illuminance (intensity) is described. It is shown that the subtraction can be performed either with spatially coherent or incoherent light, the noise being greatly reduced in the latter case.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1244dcbd998f8012994b30397ac9c117
https://doi.org/10.1016/0030-4018(72)90052-1
https://doi.org/10.1016/0030-4018(72)90052-1
Autor:
Y. Belvaux, J.C. Vareille
Publikováno v:
Optics Communications. 2:101-104
We describe a method of observation of very small phase defects by spatial filtering. The filter is an absorbing screen but in contrast with usual phase contrast, the phase-shift introduced is quite unimportant, and therefore need not be known. Never
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::992f5cf2eaaa4de3a36c7e87b848ab96
https://doi.org/10.1016/0030-4018(70)90055-6
https://doi.org/10.1016/0030-4018(70)90055-6
Autor:
J C Vareille, Y Belvaux
Publikováno v:
Nouvelle Revue d'Optique Appliquée. 2:149-162
La transformee de Hilbert permet de mettre en evidence de petits dephasages. On etudie dans le present article les proprietes des images obtenues par transformation de Hilbert, ainsi que leur evolution en fonction des differents parametres experiment
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::05ce196216eaf87a9833faba499c903a
https://doi.org/10.1088/0029-4780/2/3/302
https://doi.org/10.1088/0029-4780/2/3/302
Autor:
S.P.S. Virdi, Y. Belvaux
Publikováno v:
Optics Communications. 15:193-195
We describe a simple method to obtain a reasonably uniform non-gaussian laser illumination, while retaining a useful proportion of the input light.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::49cd5c42aaf1c7631e18960ba0a90fa0
https://doi.org/10.1016/0030-4018(75)90283-7
https://doi.org/10.1016/0030-4018(75)90283-7
Autor:
Y. Belvaux
Publikováno v:
Physics Letters A. 26:190-191
It is shown that absorption must be taken account of when reconstructing a thick hologram.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::62cd5307ac6145d5b3a1ebe81bb21526
https://doi.org/10.1016/0375-9601(68)90112-6
https://doi.org/10.1016/0375-9601(68)90112-6
Autor:
Y. Belvaux
Publikováno v:
Physics Letters A. 25:70-71
A method of calculation which involves the emulsion thickness is described which permits one to determine the influence of the various parameters of the recording setup.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::943aa463a86b611aacd067aa687edaf1
https://doi.org/10.1016/0375-9601(67)90345-3
https://doi.org/10.1016/0375-9601(67)90345-3