is convexly formed here a fifth lens 50 is an aspheric form in which both surfaces of an object side surface s 9 and an imaging side surface s 10 are all given inflection points as shown in the figure an imaging side surface s 10 of a fifth lens 50 is bent towards an imaging side as heading from a central part which is centered on an optical axis zo to a surrounding and again forms an aspheric inflection point by bending into an object side as marching from a surrounding part which is far away off an optical axis zo to an outermost angle area an aspheric inflection point formed at a fifth lens 50 may adjust a maximum emergence angle of a primary ray incident on a light receiving element 70 and an aspheric inflection point formed at an object side surface s 9 and an object side surface s 10 of a fifth lens 50 adjusts a maximum emergence angle of a primary ray and inhibits a shading of a surrounding part of a screen the filter 60 is at least any one of optical filters such as an infrared filter and a cover glass a filter 40 in a case an infrared filter is applied blocks such that radiating heat emitting from external light does not transfer to the light receiving element 70 also an infrared filter penetrates visible light and reflects infrared for outflow to an external part the light receiving element 70 is an imaging sensor such as ccd charge coupled device or cmos complementary metal oxide semiconductor the first lens 10 the second lens.