Patent ID: 11947133
Assignee: OMRON CORPORATION
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 1:
2. The display switching device according to claim 1, wherein
a light source reference position is at a predetermined position on a light source placement surface receiving the plurality of light sources, and
each of the curvature radii is a value greater than or equal to R satisfying a formula of cos θ/L+n cos θ/(T−R(1−cos θ))=(n−1)/R,
where θ is an angle between a straight line connecting the light source reference position and a center of a sphere defined by a spherical surface of a corresponding lens of the plurality of lenses and a direction perpendicular to the light source placement surface,
L is a distance from the light source reference position to the lens array,
n is a refractive index of a material comprised in the lens array, and
T is a thickness of the lens array.