Diffraktive Optische Elemente mit Verminderung von Aussprechinduziertem Lichtverlust sowie Zugehörige Systeme und Verfahren

Details

Veröffentlichungs-Nr.

EP4745457

Anmeldetag

23. Juli 2019

Veröffentlichung

20. Mai 2026

Rechtsraum

EP

IPC

F21V8/00(STENBERG PETRI ANTERO et al.)(SEESSELBERG MARKUS et al.)(WEISS VICTOR et al.)(WAVE OPTICS LTD et al.)

Abstract

Display devices include waveguides with in-coupling optical elements that mitigate re-bounce of in-coupled light to improve overall in-coupling efficiency and/or uniformity. A waveguide receives light from a light source and/or projection optics and includes an in-coupling optical element that in-couples the received light to propagate by total internal reflection in a propagation direction within the waveguide. Once in-coupled into the waveguide the light may undergo re-bounce, in which the light reflects off a waveguide surface and, after the reflection, strikes the in-coupling optical element. Upon striking the in-coupling optical element, the light may be partially absorbed and/or out-coupled by the optical element, thereby effectively reducing the amount of in-coupled light propagating through the waveguide. The in-coupling optical element can be truncated or have reduced diffraction efficiency along the propagation direction to reduce the occurrence of light loss due to re-bounce of in-coupled light, resulting in less in-coupled light being prematurely outcoupled and/or absorbed during subsequent interactions with the in-coupling optical element.

Anmelder

Firma

Magic Leap, Inc.

Land

🇺🇸 USA

Fachgebiete