Imaging lens, imaging device, portable terminal, and method for manufacturing imaging lens

An imaging lens comprising:

• one or two lens blocks each including
• a lens substrate that is a parallel plate, and
• a lens contiguous with at least one of object-side and image-side substrate surfaces of the lens substrate, the lens exerting a positive or negative optical power;
• and
• an aperture stop restricting light amount,
• wherein, in each of said one or two lens blocks, said lens included therein is formed of a material different from a material of which said lens substrate is formed;
• wherein said one or two lens blocks comprise a first lens block disposed at a most object-side position, the first lens block exerting a positive optical power and including,
• as said lens substrate, a first lens substrate, and
• as said lens, a lens L[LS1o] contiguous with an object-side substrate surface of the first lens substrate, and
• wherein conditional formula (C1) below is fulfilled:
• 0.1≦|N[LS1]/N[L[LS1o]]|(C1)
• where
• N[LS1] represents an index of refraction of the first lens substrate;
• and
• N[L[LS1o]] represents an index of refraction of the lens L[LS1o].