Projector architecture incorporating artifact mitigation

US11016292B2 · kind B2 · utility

Assignee

• Magic Leap, Inc. · US

Inventors

• Miller H. Schuck · Erie, US
• Kevin Curtis · New Providence, US
• Hui-Chuan Cheng · Pembroke Pines, US
• Bradley Jay Sissom · Boulder, US
• Paul M. Greco · Coral Springs, US
• William Hudson Welch · Fort Lauderdale, US
• Eric C. Browy · Coral Springs, US

Key dates

• Filing date: Feb 15, 2018
• Grant date: May 25, 2021
• Expiry date: Mar 21, 2038

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B2027/012
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

An eyepiece unit with optical filters includes a set of waveguide layers including a first waveguide layer and a second waveguide layer. The first waveguide layer is disposed in a first lateral plane and includes a first incoupling diffractive element disposed at a first lateral position, a first waveguide, and a first outcoupling diffractive element. The second waveguide layer is disposed in a second lateral plane adjacent to the first lateral plane and includes a second incoupling diffractive element disposed at a second lateral position, a second waveguide, and a second outcoupling diffractive element. The eyepiece unit also includes a set of optical filters including a first optical filter positioned at the first lateral position and operable to attenuate light outside a first spectral band and a second optical filter positioned at the second lateral position and operable to attenuate light outside a second spectral band.