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1. WO1996003226 - OPTICAL INSPECTION SYSTEM

Publication Number WO/1996/003226
Publication Date 08.02.1996
International Application No. PCT/IE1995/000038
International Filing Date 25.07.1995
Chapter 2 Demand Filed 08.02.1996
IPC
B07C 5/342 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
07SEPARATING SOLIDS FROM SOLIDS; SORTING
CPOSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
5Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
34Sorting according to other particular properties
342according to optical properties, e.g. colour
G01N 21/85 2006.01
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
21Investigating or analysing materials by the use of optical means, i.e. using infra-red, visible or ultra-violet light
84Systems specially adapted for particular applications
85Investigating moving fluids or granular solids
CPC
B07C 5/342
BPERFORMING OPERATIONS; TRANSPORTING
07SEPARATING SOLIDS FROM SOLIDS; SORTING
CPOSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
5Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
34Sorting according to other particular properties
342according to optical properties, e.g. colour
G01N 15/0205
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
15Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
02Investigating particle size or size distribution
0205by optical means, e.g. by light scattering, diffraction, holography or imaging
G01N 15/147
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
15Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
10Investigating individual particles
14Electro-optical investigation, e.g. flow cytometers
1468with spatial resolution of the texture or inner structure of the particle
147the analysis being performed on a sample stream
G01N 2015/149
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
15Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
10Investigating individual particles
14Electro-optical investigation, e.g. flow cytometers
149Sorting the particles
G01N 2015/1493
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
15Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
10Investigating individual particles
14Electro-optical investigation, e.g. flow cytometers
1493Particle size
G01N 21/85
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
21Investigating or analysing materials by the use of optical means, i.e. using infra-red, visible or ultra-violet light
84Systems specially adapted for particular applications
85Investigating moving fluids or granular solids
Applicants
  • OSENEY LIMITED [IE/IE]; Hallcon House Glenageary Office Park Glenageary County Dublin, IE (AllExceptUS)
  • MALLON, John [IE/IE]; IE (UsOnly)
  • MOYNIHAN, Maurice [IE/IE]; IE (UsOnly)
Inventors
  • MALLON, John; IE
  • MOYNIHAN, Maurice; IE
Agents
  • WALSH, Michael, J. ; Tomkins & Co. 5 Dartmouth Road Dublin 6, IE
Priority Data
S94059325.07.1994IE
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) OPTICAL INSPECTION SYSTEM
(FR) SYSTEME DE CONTROLE OPTIQUE
Abstract
(EN)
In an optical inspection system for edible natural products, the products are passed through an inspection region in which light is directed onto the products from optical units (61 and 62) during passage of the products through the inspection region. A sensor (66, 67) detects light returned from the products passing through the inspection region. The invention provides an optical system consisting of lenses (84, 85, 86) for directing light from source units (61, 62) onto the products passing through the inspection region substantially at a specified target region (69) within the inspection region. The light sources (61, 62) comprise light emitting diodes (81, 82, 83) and the focussing is achieved by outer rows of diodes (82, 83) being displaced outwardly relative to the axes of respective cylindrical lenses (84, 85) of the optical system so that light originating from the outer rows of diodes (82, 83) converges towards that passing along the central axis (68) extending from a central row of diodes (81) through central lens (86) to the target region (69), light from all three rows of diodes (81, 82, 83) being therefore focussed substantially at the target region (69). Suitably the system comprises two lens assemblies (61, 62) working in association with a centrally located sensor assembly (66, 67). Advantages are reduction in the number of LEDs required at an inspection station, reduction of dirt build-up on sensor window (71) by virture of the target region (69) being located at a greater spacing than in constructions using unfocussed light, and substantial elimination of responsiveness to spurious signals originating beyond the target zone (69).
(FR)
Système de contrôle optique pour produits naturels comestibles, dans lequel les produits passent dans une zone de contrôle dans laquelle de la lumière émise par des unités optiques (61, 62) est envoyée sur les produits pendant leur passage dans la zone de contrôle. Un capteur (66, 67) détecte la lumière renvoyée par les produits en défilement dans la zone de contrôle. On a prévu un système optique constitué de lentilles (84, 85, 86) servant à diriger sur les produits en défilement dans la zone de contrôle la lumière émise par des unités de source (61, 62), et ce sensiblement dans une zone cible spécifiée (69) à l'intérieur de la zone de contrôle. Les sources lumineuses (61, 62) comportent des diodes lumineuses (81, 82, 83) et la focalisation est assurée par des rangées extérieures de diodes (82, 83) déplacées vers l'extérieur par rapport aux axes des lentilles cylindriques respectives (84, 85) du système optique, afin que la lumière provenant des rangées extérieures de diodes (82, 83) converge sur celle suivant l'axe central (68) qui s'étend à partir d'une rangée centrale de diodes (81) et jusqu'à la zone cible (69) en traversant une lentille centrale (86), la lumière émise par les trois rangées de diodes (81, 82, 83) étant de ce fait focalisée sensiblement au niveau de la zone cible (69). Le système comporte avantageusement deux ensembles à lentilles (61, 62) utilisées en association avec un ensemble à capteur central (66, 67). Ledit système est avantageux en ce que le nombre de diodes lumineuses nécessaires au poste de contrôle est réduit, l'accumulation de saleté sur la fenêtre (71) du capteur est réduite, étant donné que la zone cible (69) est plus éloignée que dans les structures mettant en oeuvre une lumière non focalisée, et la sensibilité aux signaux parasites dont l'origine se situe au-delà de la zone cible (69) est sensiblement éliminée.
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