To reduce the size and weight of an optical scanner, the present invention provides a mirrorless beam scanning unit wherein the light emitter itself moves back and forth. In the preferred embodiments the light emitter is a visible light diode (VLD) mounted on the axis of a rotatable shaft. The VLD emits...http://www.google.com.au/patents/US5410140?utm_source=gb-gplus-sharePatent US5410140 - Mirrorless ring mounted miniature optical scanner
