HOPS (Holographic-Optical Projection Screens) are transparent projection screens for large-format reproduction of pictures under daylight or under direct spotlight. HOPS is based on high-resolution holographic film, which is treated by extensive laser technology and alternatively laminated with glass or acrylic. The exposed film beams light to the viewer as rear-projection to the screen in a special angle. Incoming stray light is not reflected back or diffracted, resulting in a superior image quality. [via Sax3D; suggested by Dan Corson, Seattle.]
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