PROJECTION LENS UNIT FOR PICO PROJECTOR

摘要

PURPOSE: A projection lens unit for a pico projector is provided to improve the brightness of an image by reducing the number of lenses forming a lens array. CONSTITUTION: A projection lens unit includes a lens array consisting of five lenses, a color synthesizing prism(200), a cover glass(300), and an image panel(400). The lens array comprises a first lens or a fifth lens arranged from a screen in order. A first, a fourth and a fifth lens have positive refraction resolution. A second lens and a third lens have a negative refraction resolution.