Hockey puck shaped continuous diffuse illumination apparatus...

F - Mech Eng,Light,Heat,Weapons – 21 – V

Patent

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Details

F21V 13/04 (2006.01) F21V 17/00 (2006.01) G01N 21/88 (2006.01) H04N 7/18 (2006.01)

Patent

CA 2235406

The method and apparatus for providing a continuous, uniformed, diffused light environment for use in conjunction with an electronic machine vision or manual microscope inspection system, particularly for inspection of specular surfaces such as ball bearings, reflective packaging and other shiny surfaces. The illumination device (2) includes a source of light (24) which is associated with at least the secondary diffusers (26) to provide secondary diffused illumination, of an object (o) to be observed, substantially along the observation axis (A) of the object. The same light source may also illuminate a rear surface of the primary diffuser (10). The height of the illumination device is approximately three and one half times the clear aperture (CA) dimension of the illumination device or less. The illumination of the object with light which is equal in intensity and character to facilitate accurately viewing of the entire area of the object to be viewed.

Cette invention concerne un procédé et un appareil permettant de créer un environnement lumineux diffus, uniforme et continu, destiné à être utilisé conjointement avec un dispositif de vision artificielle électronique ou de contrôle manuel par microscope, notamment pour le contrôle de surfaces spéculaires telles que roulements à bille, boîtier d'encapsulation réfléchissant et autres surfaces brillantes. Le dispositif d'éclairement (2) comporte une source lumineuse (24) qui est associée au moins aux diffuseurs (26) secondaires de façon à assurer un éclairement secondaire diffus d'un objet (o) à observer, sensiblement le long de l'axe d'observation (A) de l'objet. La même source lumineuse peut également éclairer une surface arrière du diffuseur primaire (10). La hauteur du dispositif d'éclairement est approximativement égale ou inférieure à trois fois et demi la dimension de l'ouverture (CA) du dispositif d'éclairement. L'éclairement de l'objet par une lumière d'intensité et de caractéristiques uniformes facilite la visualisation précise de la totalité de la zone de l'objet à observer.

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