Imaging lens, manufacturing method and imaging unit therefor

An imaging lens comprising at least one set of junction type compound lenses facing each other, each of the junction type compound lenses including a parallel tabular lens substrate and a lens portion formed on at least one of substrate surfaces of the lens substrate,

• wherein a space holding portion made of a same material as a material of the lens portion is formed on each of the junction type compound lenses facing each other, outside effective apertures of the junction type compound lenses, and
• wherein mating faces, each of which is provided on an opposing surface of the space holding portion of each of the junction type compound lenses are placed in direct contact with each other.

A method of manufacturing an imaging lens comprising at least one set of junction type compound lenses facing each other, each of the junction type compound lenses including a parallel tabular lens substrate and a lens portion formed on at least one of substrate surfaces of the lens substrate, the method comprising the steps of:

• forming a space holding portion made of a same material as a material of the lens portion on one of junction type compound lenses facing each other, outside an effective aperture of the one of the junction type compound lenses;
• and
• bonding to fix the junction type compound lenses facing each other together during assembling, while placing a mating face provided on a surface of the space holding portion in direct contact with a mating face provided on another facing junction type compound lens among the junction type compound lenses at a position facing the mating face of the space holding portion, outside an effective aperture of the another facing junction type compound lens.

A method of manufacturing an imaging lens comprising at least one set of junction type compound lenses facing each other, each of the junction type compound lenses including a parallel tabular lens substrate and a lens portion formed on at least one of substrate surfaces of the lens substrate, the method comprising the steps of:

• forming a space holding portion made of a same material as a material of the lens portion on each of the junction type compound lenses facing each other, outside effective apertures of both of the junction type compound lenses;
• and
• bonding to fix the junction type compound lenses facing each other together during assembling, while placing mating faces, each of which is provided on an opposing surface of the space holding portion of each of the junction type compound lenses in direct contact with each other.