Zobrazeno 1 - 10
of 96
pro vyhledávání: '"R Grousson"'
Publikováno v:
Journal of Applied Physics. 84:509-516
A theoretical study of laser cooling at low temperature by anti-Stokes luminescence in a rare-earth doped glass is performed. A model is developed to evaluate the absorption and emission spectra of rare-earth ions in a glass matrix. This model allows
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f13a034cf8666ae75ea32d5d2f655f67
https://doi.org/10.1063/1.368054
https://doi.org/10.1063/1.368054
Autor:
S. Mallick, R. Grousson
Publikováno v:
Applied optics. 19(11)
Iron-doped LiNbO3 has been employed to carry out some image processing operations such as sum, difference, or multiplication of two intensity distributions. Contrast enhancement or reversal of a signal can also be obtained. The signals, modulated on
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a5c59ca5e0879f959be82995840f3b38
https://pubmed.ncbi.nlm.nih.gov/20221121
https://pubmed.ncbi.nlm.nih.gov/20221121
Autor:
S. Mallick, R. Grousson
Publikováno v:
Optica Acta: International Journal of Optics. 22:981-987
An expression is derived for the irradiance distribution in the neighbourhood of the geometrical image plane of a grating. The illuminating source has finite dimensions and emits over a large spectral width. Only two or three diffracted orders are us
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2ac5e96fda437b9b51f753248850f7e1
https://doi.org/10.1080/713819003
https://doi.org/10.1080/713819003
Publikováno v:
Journal of Optics. 17:233-244
The authors present a method for studying, by speckle interferometry, the defects of centering of an optical system. This is achieved by determining the positions of each element relative to a mechanical axis. A speckle photograph of a scatter plate
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a0e3b9bf5aea21e0198ed7e28fb90007
https://doi.org/10.1088/0150-536x/17/5/003
https://doi.org/10.1088/0150-536x/17/5/003
Autor:
R Grousson, S Mallick
Publikováno v:
Nouvelle Revue d'Optique. 7:77-85
We describe a method of storing a number of real amplitude images on a photographic plate by modulating each image on a different spatial carrier. The signal to be stored is placed in contact with a grid (2 crossed gratings) and this ensemble is imag
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::03f88b3b2570822a66de8e300b6eabfe
https://doi.org/10.1088/0335-7368/7/2/301
https://doi.org/10.1088/0335-7368/7/2/301
Publikováno v:
Optics Communications. 51:342-346
We study the characteristics of the amplified back-scattered light in a LiNbO 3 :Fe crystal cut normal to the optic axis when it is illuminated with a linearly polarized parallel beam of monochromatic light. The scattered light forms different patter
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::940f4f5454db60b4f1c5028d99f5ffcb
https://doi.org/10.1016/0030-4018(84)90023-3
https://doi.org/10.1016/0030-4018(84)90023-3
Publikováno v:
Journal of Optics. 13:189-192
Describes an optical analogue method for transforming density variations of a black and white image into colour variations. No photographic process is involved in the technique which consists in modulating the input transparency with a high frequency
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d7865c2f8d8d3772d495260061f08ab2
https://doi.org/10.1088/0150-536x/13/4/002
https://doi.org/10.1088/0150-536x/13/4/002
Autor:
R S Kinany, R Grousson
Publikováno v:
Journal of Optics. 9:333-339
Color images are stored on black and white film. Three fundamental components are extracted by means of color filters. Each component in turn is placed in contact with a grid, and in the Fourier plane, a mask selects two diffracted orders. Thus in th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::26fae47b87f09fb6659905b531ec4e29
https://doi.org/10.1088/0150-536x/9/6/002
https://doi.org/10.1088/0150-536x/9/6/002
Publikováno v:
Journal of Applied Physics. 54:3012-3016
Birefringence changes induced in LiNbO3:Fe by a light beam have been measured to determine the photovoltaic characteristics such as the saturation value of space charge field, dielectric relaxation time, the probability φ of creating a free electron
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::59ffd9ba5168badbde2d40117feb432c
https://doi.org/10.1063/1.332504
https://doi.org/10.1063/1.332504
Autor:
S.G. Odoulov, R. Grousson
Publikováno v:
Optics Communications. 39:219-224
Angular selectivity of a volume grating has been exploited to generate a high-pass filtering function that cuts off the zero frequency and attenuates the low frequencies. The filter can be used for the edge enhancement of amplitude and phase objects.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::148a37ff6dc2ec92a0d46f6aff387aef
https://doi.org/10.1016/0030-4018(81)90110-3
https://doi.org/10.1016/0030-4018(81)90110-3