18903976. LIGHTGUIDE INCLUDING RIGHT-ANGLE LOUVER RETROREFLECTORS (GOOGLE LLC)
LIGHTGUIDE INCLUDING RIGHT-ANGLE LOUVER RETROREFLECTORS
Organization Name
Inventor(s)
Alexander Koshelev of San Jose CA US
Christophe Peroz of Zollikon CH
LIGHTGUIDE INCLUDING RIGHT-ANGLE LOUVER RETROREFLECTORS
This abstract first appeared for US patent application 18903976 titled 'LIGHTGUIDE INCLUDING RIGHT-ANGLE LOUVER RETROREFLECTORS
Original Abstract Submitted
A lightguide for a head-wearable display or near-eye display includes an incoupler configured to direct display light representative of an image to the eye of a user. To direct the display light, the lightguide includes an incoupler that has reflectors configured to first direct the display light into the lightguide such that the display light propagates through the body lightguide and is received at a combined exit pupil expansion and outcoupling structure of the lightguide. This combined exit pupil expansion and outcoupling structure includes an array of louver retroreflectors that expands the eyebox of the image and also directs at least a portion of the display light out of the lightguide and toward the eye of the user. The louver retroreflectors in the array of louver retroreflectors each includes a first reflective surface and a second reflective surface arranged substantially orthogonal to each other.