Patent ID: 11860574
Assignee: BEIJING BOE DISPLAY TECHNOLOGY CO., LTD.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 7:
8. The holographic optical apparatus according to claim 1, wherein the focal length modulation component includes a spatial light modulator;
the spatial light modulator includes an upper substrate, a lower substrate, a liquid crystal layer located between the upper substrate and the lower substrate, a lower polarizer located on a side of the lower substrate away from the upper substrate, and an upper polarizer located on a side of the upper substrate away from the lower substrate; and
the spatial light modulator has a plurality of sub-units, each sub-unit is provided with a first electrode and a second electrode therein, the first electrode is disposed on the lower substrate, and the second electrode is disposed on the lower substrate or the upper substrate.