ANALYSIS OF A CONICAL OPTICAL BEAM DEFLECTOR INSENSITIVE TO MOTOR WOBBLE

The analysis of a patented optical beam deflector based on a rotating prism is presented. It is shown that because of the transmissive, as o pposed to reflective, nature of the proposed deflector, the resulting scan spot is for all practical purposes completely free of the trackin g error that is so problematic to all reflective-type deflectors. In a ddition, if a conical scan is either acceptable or desirable, the scan lens design will be much simpler because the f - theta condition is n ot required and the scan field is inherently flat.