Search International and National Patent Collections
Some content of this application is unavailable at the moment.
If this situation persists, please contact us atFeedback&Contact
1. (WO1991006881) VISUAL IMAGE TRANSMISSION BY FIBRE OPTIC CABLE
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1991/006881 International Application No.: PCT/GB1990/001683
Publication Date: 16.05.1991 International Filing Date: 02.11.1990
Chapter 2 Demand Filed: 03.06.1991
IPC:
G02B 6/06 (2006.01) ,H04N 1/195 (2006.01) ,H04N 5/225 (2006.01)
G PHYSICS
02
OPTICS
B
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
6
Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
04
formed by bundles of fibres
06
the relative position of the fibres being the same at both ends, e.g. for transporting images
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
N
PICTORIAL COMMUNICATION, e.g. TELEVISION
1
Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
04
Scanning arrangements
19
using multi-element arrays
195
the array comprising a two-dimensional array
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
N
PICTORIAL COMMUNICATION, e.g. TELEVISION
5
Details of television systems
222
Studio circuitry; Studio devices; Studio equipment
225
Television cameras
Applicants:
THE SECRETARY OF STATE FOR DEFENCE IN HER BRITANNIC MAJESTY'S GOVERNMENT OF THE UNITED KINGDOM OF GREAT BRITAIN AND NORTHERN IRELAND [GB/GB]; Whitehall London SW1A 2HB, GB (AllExceptUS)
DUJON, Gregory, Francis [LC/GB]; GB (UsOnly)
PARKER, Arthur, Beck [GB/GB]; GB (UsOnly)
THOMAS, Andrew, James [GB/GB]; GB (UsOnly)
Inventors:
DUJON, Gregory, Francis; GB
PARKER, Arthur, Beck; GB
THOMAS, Andrew, James; GB
Agent:
BECKHAM, Robert, William; Ministry of Defence Patents 1A, Room 2014 Empress State Building Lillie Road London SW6 1TR, GB
Priority Data:
8924793.603.11.1989GB
Title (EN) VISUAL IMAGE TRANSMISSION BY FIBRE OPTIC CABLE
(FR) TRANSMISSION D'IMAGES VISUELLES PAR CABLE OPTIQUE
Abstract:
(EN) A method of calibrating an incoherent optical fibre bundle to be used for image transmission, by determining the relative input to output position of each fibre in the bundle and processing the light output of the bundle accordingly. The calibration technique comprises, defining an address array capable of defining for the optical bundle the position of the ends of individual optical fibres in the bundle; transmitting a series of test images into one end of the optical fibre bundle, each test image illuminating a substantial proportion of the pixels and the combination of which selectively illuminate each pixel of the address array; analysing the output of the fibre bundle with reference to the transmitted images to produce a reference table of input to output for the fibres; and using the reference table to deconvolve an image transmitted along the fibre bundle. Calibrated incoherent optical fibres are of particular use for examining nuclear reactors, chemical vats and other harsh environments.
(FR) Procédé de calibrage d'un faisceau de fibres optiques à lumière incohérente pour la transmission d'images, par détermination de la position relative entrée/sortie de chaque fibre de faisceau et par traitement approprié de la lumière sortant du faisceau. Le calibrage comporte la définition d'un réseau d'adresse capable de définir pour le faisceau optique la position des extrémités de fibres optiques individuelles du faisceau; transmission dans l'une des extrémités du faisceau de fibres optiques d'une série d'images d'essai, chaque image d'essai éclairant une partie importante des pixels, dont la combinaison éclaire chaque pixel du réseau d'adresse; analyse de la sortie du faisceau de fibres par rapport aux images transmises afin de créer un tableau de référence d'entrée/sortie pour les fibres; et utilisation du tableau de référence pour obtenir la déconvolution d'une image transmise le long du faisceau de fibres. Les fibres optiques calibrées à lumière incohérente sont utiles en particulier pour le contrôle de réacteurs nucléaires, des fûts à produits chimiques et pour d'autres environnements agressifs.
Designated States: CA, GB, JP, US
European Patent Office (AT, BE, CH, DE, DK, ES, FR, GB, GR, IT, LU, NL, SE)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
ES2080841EP0498839US5327514JPH06503653CA2072654DE000069024368
GB2253540DK0498839