IMAGING LENS SYSTEM WITH TWO LENSES

摘要

PURPOSE: An image lens system with two lenses is provided to have a long post focus distance and to reduce manufacturing costs. CONSTITUTION: An image lens system(1) comprises an aperture stop(S), a first lens(11), and a second lens(12). The first lens has positive refraction power and consists of a convex lens. The second lens has negative refraction power and consists of a meniscus lens. The meniscus lens forms a concave surface and a convex surface.