Patent ID: 11933466
Assignee: KOITO MANUFACTURING CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC F  G | IPC F

Claim 0:
1. A vehicular lamp comprising:
a light source unit; and
a meta-lens in which a plurality of cells including a nanostructure smaller than a longest wavelength of light emitted from the light source unit are arranged, the meta-lens having a meta region through which the light emitted from the light source unit passes,
wherein the meta region changes a phase distribution of the light passing through the meta region;
wherein the meta region changes a phase distribution of a reference light so that the phase distribution of the reference light emitted from the meta-lens becomes a specific phase distribution obtained by dividing a predetermined phase distribution by 2π when the reference light parallel to a reference axis orthogonal to the meta region is incident on the meta region at a specific position in the meta region,
the predetermined phase distribution is a phase distribution in which a phase delay amount (rad) decreases and a reduction rate of the phase delay amount increases with distance from the reference axis,
the specific phase distribution has a plurality of peaks, and
the plurality of cells are arranged such that two or more of the cells are located between the peaks adjacent to each other in a direction away from the specific position when viewed along the reference axis.