Optical filter and imaging lens unit

An imaging lens unit comprising:

• an imaging lens;
• and
• an optical filter comprising:
• a base material;
• and
• a plurality of light scattering particles mixed into the base material, wherein the plurality of light scattering particles contain a plurality of scattering elements which differ from each other in a manner of appearance of “scattered light intensity distribution for respective wavelengths”,
• wherein
• the optical filter has negative power.

An imaging lens unit comprising:

• an imaging lens;
• and
• an optical filter member having a negative power and including an optical filter comprising:
• a base material;
• a plurality of light scattering particles mixed into the base material, wherein the plurality of light scattering particles contain a plurality of scattering elements which differ from each other in a manner of appearance of “scattered light intensity distribution for respective wavelengths”;
• and
• the imaging lens unit further comprises:
• a transparent member made of the same material as the base material of the optical filter, and integrally formed with the optical filter by being connected to a recessed surface of the optical filter, wherein
• power of an integral body formed of the optical filter and the transparent member is substantially set to 0 (zero).