Orthogonal optical path length extender

US10185153B2 · kind B2 · utility

Assignee

• Avegant Corp. · US

Inventors

• Aaron Matthew Eash · San Francisco, US
• Allan Thomas Evans · Richland, US
• Andrew John Gross · Redwood City, US
• D. Scott Dewald · Dallas, US
• Warren Cornelius Welch, III · Foster City, US

Key dates

• Filing date: Aug 11, 2017
• Grant date: Jan 22, 2019
• Expiry date: Aug 11, 2037

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B2207/117
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A system to adjust light path length comprising a digital light path length modulator is described. The digital light path length modulator comprises a polarization modulator to receive polarized light and to modulate a polarization of some or all of the polarized light, and an optical path length extender (OPLE) to direct the light entering the OPLE with a first polarization along a first light path through the OPLE, and to direct the light entering the OPLE with a second polarization along a second light path through the OPLE, the second light path through the OPLE having a light path length longer than the first light path length through the OPLE.