Diffractive filtering in a waveguide display

US10527852B2 · kind B2 · utility

Assignee

• MICROSOFT TECHNOLOGY LICENSING, LLC · US

Inventors

• Lasse Pekka Karvonen · Espoo, FI
• Andreas Langner · Alzenau, DE

Key dates

• Filing date: May 24, 2017
• Grant date: Jan 7, 2020
• Expiry date: May 24, 2037

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B2027/0125
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

Examples are disclosed that relate to the use of diffractive filtering in a waveguide display system. One example provides a display system including a light source, a first waveguide configured to conduct light of a first wavelength band from the light source, the first waveguide comprising a first input coupler, a second waveguide configured to conduct light of a second wavelength band from the light source, the second waveguide comprising a second input coupler, and a diffractive filter positioned optically between the first waveguide and the second waveguide, the diffractive filter being configured to diffract light of the first wavelength band and transmit light of the second wavelength band.