The materials were also evaluated in praxis by exposing them on a XFP2000 He/Ne Laser COM (trademarked product of ANACOMP), followed by processing as set forth hereinbefore.
Telecentric f.theta. lens system for laser COM
Abstract：A telecentric f.theta. lens system for use in a laser COM comprising, from the object field side, a first lens unit including at least one negative lens component for generating a large negative distortion, a second lens unit consisting of one or two positive lens components for compensating spherical aberration and astigmatism generated by the first lens unit, a third lens unit including at least one positive lens component for providing a telecentric characteristic and a fourth lens unit including three or four lens components for providing a small F number.
