A portable laser diode scanning head, aimable at each symbol to be read, emits and receives non-readily-visible laser light, and is equipped with a trigger-actuated aiming light arrangement for visually locating and tracking each symbol. A compact laser diode optical train and an optical folded path...http://www.google.es/patents/US5021641?utm_source=gb-gplus-sharePatente US5021641 - Hand-held bar code scanner with jointly mounted scanning mirrors
Hand-held bar code scanner with jointly mounted scanning mirrors
