Patent ID: 11940639
Assignee: MAGIC LEAP, INC.
Field: Optics (Instruments)
Classification: CPC G | IPC F  G

Claim 0:
1. An optical device that is wearable on a head of a user, the optical device comprising:
a one-way mirror arranged on a world side of the optical device, the one-way mirror comprising:
a depolarizer including at least one retarder having random optical axis orientations such that the depolarizer receives light from the world side of the optical device and randomizes a polarization of at least a portion of the received light;
a polarization selective mirror oriented to receive light from the depolarizer and configured to transmit, through the polarization selective mirror, a portion of the received light having randomized polarization, the polarization selective mirror having a transmission axis; and
an absorptive polarizer oriented to receive the light transmitted through the polarization selective mirror, the absorptive polarizer having a transmission axis aligned with the transmission axis of the polarization selective mirror,
wherein the polarization selective mirror is disposed between the depolarizer and the absorptive polarizer; and

an actively variable dimmer comprising the absorptive polarizer, an additional polarizer, and an array of liquid crystal elements disposed between the absorptive polarizer and the additional polarizer, wherein the one-way mirror and the actively variable dimmer form an integrated structure by sharing the absorptive polarizer as a component of both the one-way mirror and the actively variable dimmer.