Patent ID: 11892665
Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
Field: Optics (Instruments)
Classification: CPC G  F  B | IPC B  F  G

Claim 9:
10. A colloidal crystal structure comprising:
a colloidal structural layer comprising a plurality of types of colloidal particles, and a binder disposed between the plurality of types of colloidal particles to fix the colloidal particles; and
a refractive index control material that is provided on one surface of the colloidal structural layer, is transparent, and has a refractive index difference of less than 10% with respect to the binder,
wherein the plurality of types of colloidal particles comprises at least first colloidal particles and second colloidal particles that are different in average particle size from each other,
the first colloidal particles and the second colloidal particles have coefficients of variation of particle size, each being less than 20%,
the plurality of types of colloidal particles forms a three-dimensionally regular array in the binder, and the regular array adopted by the plurality of colloidal particles is a close-packed structure, a face-centered cubic structure or a body-centered cubic structure, and
the colloidal particles are spaced apart from one another, and the binder is interposed between the colloidal particles.