Optical element, optical equipment, and imaging apparatus

An optical element comprising:

• a first optical layer;
• a second optical layer;
• and
• a transparent base material, the first optical layer being disposed between the second optical layer and the transparent base material and a diffraction grating being disposed at the interface between the first optical layer and the second optical layer,
• wherein the refractive index of the d-line of the second optical layer is higher than the refractive index of the d-line of the first optical layer,
• the Abbe number of the second optical layer is higher than the Abbe number of the first optical layer,
• the first optical layer is composed of a first resin and inorganic particles dispersed in the first resin, and
• the second optical layer is composed of a second resin having a modulus of elasticity of 0.1 GPa or more and 3.0 GPa or less at 22° C. or higher and 24° C. or lower,
• wherein the second resin is an ene-thiol-based resin,
• wherein the inorganic particles dispersed in the first resin are composed of an indium tin compound that is a transparent electroconductive substance, and have an average primary particle diameter of 3 nm to 20 nm.