Patent ID: 11912899
Assignee: SONY GROUP CORPORATION
Field: Basic materials chemistry (Chemistry)
Classification: CPC C | IPC C

Claim 0:
1. An optical system comprising:
an optical element configured to generate or manipulate visible light; and
a film for absorbing visible light, the film including a plurality of silica nanoparticles,
wherein a surface of at least a part of the plurality of silica nanoparticles is functionalized with a plurality of pigment molecules of a Melanin compound, and the film is at a position relative to the optical element to reduce stray visible light from interfering with visible light output from the optical system,
wherein an average size of each of the plurality of silica nanoparticles is in a wavelength range of the visible light, and
wherein at least a part of pairs of neighboring pigment molecules of the plurality of pigment molecules is cross-linked, wherein the cross-linked is selected from the group consisting of a diamine, a dihydrazide, a borate ion, and a dicarbamate.