PROJECTION LENS UNIT FOR PICO PROJECTOR

摘要

PURPOSE: A projection lens unit for a pico projector is provided to reduce the height of a lens array while improving whole performance of the lens array when forming a stop face in a first side of a first lens and manufacturing the first lens as a aspheric injection lens. CONSTITUTION: A lens array(100) is comprised of a lenses(110-150) and is arranged from a screen in order. A stop face is formed on the first side of a first lens and functions as an aperture stop. The ray passing the lens is progressed on the one part of a lens face on a basis of the aperture stop. A part of the lens face through which the ray is not passed is cut. A flange face is formed at both sides of the first lens.