SUBMINIATURE OPTICAL SYSTEM

摘要

PURPOSE: A micro sized optical system is provided to obtain high quality by using 5 lenses and to minimize manufacturing costs. CONSTITUTION: A micro sized optical system(100) comprises an opening aperture(AS), a first lens(L1), a second lens(L2), a third lens(L3), a fourth lens(L4), and a fifth lens(L5). The opening aperture controls the amount of light. The first lens is convex toward an object side and has positive refraction power. The second lens is concave toward the upper side and has negative refraction power. The third lens is convex toward the upper side and has positive refraction power. The fourth lens is formed in a meniscus shape having an aspheric surface which is convex toward to the upper side and has negative refraction power. The fifth lens has a double sided aspheric surface which is concave toward the upper side.