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1. WO2014207742 - A SYSTEM AND METHOD FOR COLOR IMAGE ACQUISITION

Publication Number WO/2014/207742
Publication Date 31.12.2014
International Application No. PCT/IL2014/050566
International Filing Date 24.06.2014
IPC
H04N 9/04 2006.1
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
9Details of colour television systems
04Picture signal generators
G01J 3/26 2006.1
GPHYSICS
01MEASURING; TESTING
JMEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED, VISIBLE OR ULTRA-VIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
3Spectrometry; Spectrophotometry; Monochromators; Measuring colours
12Generating the spectrum; Monochromators
26using multiple reflection, e.g. Fabry-Perot interferometer, variable interference filter
CPC
G01J 3/26
GPHYSICS
01MEASURING; TESTING
JMEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED, VISIBLE OR ULTRA-VIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
3Spectrometry; Spectrophotometry; Monochromators; Measuring colours
12Generating the spectrum; Monochromators
26using multiple reflection, e.g. Fabry-Perot interferometer, variable interference filters
G01J 3/51
GPHYSICS
01MEASURING; TESTING
JMEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED, VISIBLE OR ULTRA-VIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
3Spectrometry; Spectrophotometry; Monochromators; Measuring colours
46Measurement of colour; Colour measuring devices, e.g. colorimeters
50using electric radiation detectors
51using colour filters
G02B 26/001
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
26Optical devices or arrangements using movable or deformable optical elements for controlling the intensity, colour, phase, polarisation or direction of light, e.g. switching, gating, modulating
001based on interference in an adjustable optical cavity
G06T 3/4015
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
3Geometric image transformation in the plane of the image
40Scaling the whole image or part thereof
4015Demosaicing, e.g. colour filter array [CFA], Bayer pattern
H04N 9/04515
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
9Details of colour television systems
04Picture signal generators
045using solid-state devices
0451characterized by colour imaging operations
04515Demosaicing, e.g. interpolating colour pixel values
H04N 9/04557
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
9Details of colour television systems
04Picture signal generators
045using solid-state devices
0455Colour filter architecture
04551Mosaic colour filter
04557based on three different wavelength filter elements
Applicants
  • TECHNOLOGY INNOVATION MOMENTUM FUND (ISRAEL) LIMITED PARTNERSHIP [IL]/[IL]
Inventors
  • MENDLOVIC, David
  • RAZ, Ariel
Agents
  • SHLOMO, Doron
Priority Data
61/838,52524.06.2013US
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) A SYSTEM AND METHOD FOR COLOR IMAGE ACQUISITION
(FR) SYSTÈME ET PROCÉDÉ D'ACQUISITION D'IMAGES EN COULEURS
Abstract
(EN) An imaging system color image acquisition including: an image sensor; a tunable spectral filter arranged in an optical path of light propagation towards the image sensor; and a controller connected to the image sensor and to the tunable spectral filter. The controller is configured and operable for generating a colored image by sequentially operating the tunable spectral filter for sequentially filtering light passing towards the image sensor with three or more different spectral filtering curves during three or more corresponding integration time durations. The tunable spectral filter is configured, as an etalon and includes a pair of reflective surfaces. At least one of the reflective surfaces includes a layer of high refractive index of at least n=2.3 or even higher than 3, or a layer of low refractive index, smaller than n=1. The configuration of the etalon provide wide transmission peaks of the spectral curves with full-width-half maximum (FWHM) in the range of about 50 to 80 nm, free spectral range (FSR) of at least 300nm, and thickness of the etalon in the order to 1mm or even less.
(FR) L'invention concerne un système d'acquisition d'images en couleurs d'un système d'imagerie, comprenant : un capteur d'image ; un filtre spectral accordable placé sur le trajet optique de propagation de lumière vers le capteur d'image ; et un contrôleur connecté au capteur d'image et au filtre spectral accordable. Le contrôleur est configuré et utilisé pour générer une image colorée en faisant fonctionner le filtre spectral accordable séquentiellement de sorte à filtrer séquentiellement la lumière qui passe en direction du capteur d'image avec trois courbes de filtrage spectral différentes, ou plus, durant trois durées d'intégration correspondantes, ou plus. Le filtre spectral accordable est configuré comme un étalon et comprend une paire de surfaces réfléchissantes. Au moins une des surfaces réfléchissantes comprend une couche ayant un indice de réfraction élevé, d'au moins n=2.3 voire supérieur à 3, ou une couche ayant un indice de réfraction faible, inférieur à n=1. La configuration de l'étalon fournit de larges crêtes de transmission des courbes spectrales avec une largeur à mi-hauteur (FWHM) dans la plage d'environ 50 à 80 nm, une plage spectrale libre (FSR) d'au moins 300 nm, et une épaisseur de l'étalon de l'ordre de 1 mm voire moins.
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