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1. (EP0498839) VISUAL IMAGE TRANSMISSION BY FIBRE OPTIC CABLE

Office : European Patent Office
Application Number: 90916773 Application Date: 02.11.1990
Publication Number: 0498839 Publication Date: 19.08.1992
Publication Kind : B1
Prior PCT appl.: Application Number:GB1990001683 ; Publication Number: Click to see the data
IPC:
G 02B
G02B 6/04
G02B 6/06
H04B 10/00
H04N 1/195
H04N 5/225
H04N 7/22
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
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
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
B
TRANSMISSION
10
Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
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
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
N
PICTORIAL COMMUNICATION, e.g. TELEVISION
7
Television systems
22
Adaptations for optical transmission
CPC:
H04N 1/19589
G02B 6/06
H04N 1/195
H04N 1/19594
H04N 5/2254
H04N 2005/2255
H04N 2201/0077
Applicants: SECR DEFENCE BRIT
Inventors: DUJON GREGORY FRANCIS
PARKER ARTHUR BECK
THOMAS ANDREW JAMES
Priority Data: 8924793 03.11.1989 GB
9001683 02.11.1990 GB
Title: (DE) BILDÜBERTRAGUNG MITTELS EINES OPTISCHEN FASERKABELS
(EN) VISUAL IMAGE TRANSMISSION BY FIBRE OPTIC CABLE
(FR) TRANSMISSION D'IMAGES VISUELLES PAR CABLE OPTIQUE
Abstract: front page image
(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.
Also published as:
ES2080841US5327514JPH06503653CA2072654DE000069024368GB2253540
DK0498839WO/1991/006881