Patent ID: 11899336
Assignee: OSAKA UNIVERSITY
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 4:
5. The liquid crystal element according to claim 4,
wherein
the center electrode is disposed inside of the at least one first annular electrode and the at least one second annular electrode in the radial direction,
the at least one first annular electrode and the at least one second annular electrode adjacent to each other in the radial direction constitute a unit electrode, and
out of the unit electrode constituted by the at least one first annular electrode and the at least one second annular electrode and the unit electrodes each constituted by one of the first arcuate electrodes and one of the second arcuate electrodes, a unit electrode located outside of the specific location in the radial direction has a radius Rn smaller than the radius Un expressed by the formula (1) and the formula (2).