| abstract |
An endoscopic instrument capable of being optically coupled to a video monitor adapted with a prismatic screen is disclosed. The instrument includes a working channel of 0.35 mm and a biopsy instrument having a substantially tubular end. The prismatic screen is mounted between a flat image and a viewer. Additional optical elements may be provided to enlarge a viewed image. A light hood may be provided to reduce glare and other effects of ambient light. Coating the screen with an anti-reflective coating may provide further protection from ambient light. Restructuring the image into smaller image elements provides image quality for a video image or the like. An aspherical lens may be used to minimize or remove distortion of the image perceived by a viewer to the side, above or below the center viewing axis of the screen. |