Technique for depth of field viewing of images with improved...

G - Physics – 02 – B

Patent

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G02B 27/22 (2006.01) G02B 5/04 (2006.01) H01J 29/89 (2006.01) H04N 13/00 (2006.01)

Patent

CA 2175200

A screen is disclosed for viewing depth of field images. The screen includes a curved prismatic screen mounted between A flat image and a viewer. Additional optical elements may be provided to enlarge a viewed image and strengthen depth information. A light hood may be provided to reduce glare and other effects of ambient light. Further protection from ambient light may be provided by coating the screen with an anti-reflective coating. Image quality for a video image or the like is provided by restructuring the image into smaller image elements. The present invention may find particular application in medical and obstetric imaging such as sonograms, musculo-skeletal imaging, vascular imaging, angiograms, angioplasty, dental probes, catheter probes, car probes, endoscopy, laparoscopy, pelviscopy and arthroscopy.

L'invention concerne un écran pour visionner des images en profondeur de champ. Cet écran comprend un écran prismatique incurvé fixé entre une image plate et l'observateur. D'autres éléments optiques peuvent être prévus pour agrandir une image visionnée et améliorer les informations de profondeur de champ. Un capot de protection peut être prévu pour réduire l'éclat de la lumière et les autres effets de la lumière ambiante. D'autres éléments de protection contre la lumière ambiante peuvent être prévus en recouvrant l'écran d'un couche antireflet. La qualité d'image pour une image vidéo ou similiaire est assurée en restructurant l'image en éléments d'images plus petits. La présente invention peut trouver des applications particulières en imagerie médicale et obstétrique comme les sonogrammes, l'imagerie musculosquelettique, l'imagerie vasculaire, les angiogrammes, l'angioplastie, les sondes dentaires, les sondes de cathéters, les sondes auriculaires, l'endoscopie, la laparascopie, la pelviscopie et l'arthroscopie.

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