Patent ID: 11927776
Assignee: INTERDIGITAL MADISON PATENT HOLDINGS, SAS
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A light field display apparatus comprising:
a plurality of projection cells, configured to generate respective light beams, wherein a cell of the plurality of projection cells comprises:
an addressable array of light-emitting elements, configured to selectively emit light from one of the light-emitting elements;
a lens, along an optical path from the light-emitting elements to an exterior of the display apparatus, configured to collimate the emitted light, generating a light beam having a focus depth, associated with a beam waist of the light beam, at a focal length of the lens; and
a phase-modifying optical element along the optical path, configured to extend the beam waist along a propagation path of the light beam by modifying the phase of the emitted light, the extended beam waist is associated with a range of focus depth values.