Imaging lens

An imaging lens of which a distortion aberration is corrected to be small enough that an absolute value of the distortion aberration is within 10.7%, comprising an aperture stop, and a junction type compound lens having a positive refractive power without containing a diffractive optical element, wherein

• said aperture stop and said junction type compound lens are arranged in this sequence from an object side to an image side,
• said junction type compound lens comprises a first lens, a second lens and a third lens arranged in this sequence from the object side to the image side,
• said first lens and said third lens are formed of a curable resin material,
• said second lens is formed of a glass material,
• said first lens and said second lens are directly bonded, and said second lens and said third lens are directly bonded,
• said second lens is a plane parallel glass plate,
• said first lens is a plano-convex lens where the object side face of said first lens is a convex surface facing the object side,
• said third lens is a plano-convex lens where the image side face of said third lens is a convex surface facing the image side, and
• the following conditions (1)-(4) are satisfied,
• 0≦|N3−N2|≦0.0968 (1)
• 0≦|N3−N4|≦0.0968 (2)
• 0≦|ν3−ν2|≦30.0 (3)
• 0≦|ν3−ν4|≦30.0 (4)
• where
• N2:
• refractive index of said first lens
• N3:
• refractive index of said second lens
• N4:
• refractive index of said third lens
• ν2:
• Abbe number of said first lens
• ν3:
• Abbe number of said second lens
• ν4:
• Abbe number of said third lens.