Abstract: A small-sized and low-height camera module is provided. A camera module 100 includes a solid-state imaging device 1 and an imaging lens which is joined so as to have a gap between the lens and the solid-state imaging device 1. The imaging lens is configured to form a refractive index distribution 3 of a concentric circle structure so as to converge light on the image pickup area of the solid-state imaging device 1.

Abstract: It is an object of the present invention to provide an imaging device that, even if the optical axis of the multifocal lens has a deviation resulting from its decentered surfaces, can prevent an image from being deteriorated by the low precision lens. The imaging device comprises a solid state image sensor for taking an image of an object to produce an image signal indicative of the image, an aspherical single focus lens, a bifocal lens disposed in front of the solid state image sensor, the bifocal lens having two focal distances, and an aperture diaphragm located just before the bifocal lens.

Abstract: It is an object of the present invention to provide an imaging device that, even if the optical axis of the multifocal lens has a deviation resulting from its decentered surfaces, can prevent an image from being deteriorated by the low precision lens. The imaging device 1 comprises a solid state image sensor 6 for taking an image of an object to produce an image signal indicative of the image, an aspherical single focus lens 2, a bifocal lens 3 disposed in front of the solid state image sensor 6, the bifocal lens 3 having two focal distances, and an aperture diaphragm 4 located just before the bifocal lens 3.