... the cutting edge laser machinery 3. provide flat field image F Theta Scanning Lens --- Nd:YAG, Green & UV LaserIn ... to realize various applications like marking, drilling, welding, dicing, scribing, cutting, engraving etc. F-theta scanning lens is used in conjunction ... directly proportional to the scan angle. Typically, the linearity f-theta distortion is kept less than 1% without software correction ...