Camera module equipped with an optical filter having an edge not in contact with a fixing portion
A camera module includes a module structure constituted by a lens unit to which an image pickup lens is attached and a package to which an imaging element is attached so as to be opposite to the image pickup lens. An optical filter is arranged between the imaging element and the image pickup lens. A portion of a flat surface of the optical filter is fixed to a filter fixing portion via an adhesive. The optical filter is adhered to the filter fixing portion in a state in which an end portion formed by a side surface of the optical filter and the flat surface is in noncontact with the filter fixing portion or the adhesive. Minute particles generated from a cut surface of the optical filter fall outside the filter fixing portion.
1. A camera module comprising:
a module structure constituted by a lens unit to which an image pickup lens is attached and a package to which an imaging element is attached so as to be opposite to the image pickup lens;
an optical filter arranged between said imaging element and said image pickup lens; and
a filter fixing surface provided in said module structure so that a portion of a flat surface of said optical filter is fixed thereto via an adhesive,
wherein said optical filter is adhered to said filter fixing surface in a state in which an end portion formed by a side surface of said optical filter and said flat surface is in noncontact with both said filter fixing surface and said adhesive, and wherein a recessed portion is formed along the outer circumference of said filter fixing surface so as to surround the outer circumference of said filter fixing surface, and said optical filter protrudes outwardly relative to said filter fixing surface and above said recessed portion.
2. A camera module comprising:
a module structure constituted by a lens unit to which an image pickup lens is attached and a package to which an imaging element is attached so as to be opposite to the image pickup lens;
an optical filter arranged between said imaging element and said image pickup lens; and
a filter fixing portion provided in said module structure so that a portion of a flat surface of said optical filter is fixed to a filter fixing surface of said filter fixing portion via an adhesive, wherein:
said filter fixing portion is an annular protruding portion formed to protrude from a periphery of said module structure and said filter fixing surface is a top surface of said filter fixing portion; and
said optical filter is adhered to said filter fixing surface in a state in which a side surface of said optical filter protrudes outside from said annular protruding portion in a direction parallel to said filter fixing surface of said annular protruding portion.
3. The camera module as claimed in claim 2 , wherein the outer circumference of said annular protruding portion has a generally square shape having rounded four corners, and said optical filter is adhered by said adhesive being applied to the entire top surface of said annular protruding portion.