US 12,253,679 B2
Optical system for an augmented reality display
Eric Tremblay, Eindhoven (NL); Carlos Macias, Eindhoven (NL); Volker Zagolla, Eindhoven (NL); and Robin Kaech, Eindhoven (NL)
Assigned to ams International AG, Jona (CH)
Filed by ams International AG, Jona (CH)
Filed on Aug. 24, 2023, as Appl. No. 18/455,481.
Application 18/455,481 is a continuation in part of application No. PCT/EP2023/054758, filed on Feb. 24, 2023.
Claims priority of application No. 2202622 (GB), filed on Feb. 25, 2022.
Prior Publication US 2023/0400695 A1, Dec. 14, 2023
Int. Cl. G02B 27/01 (2006.01); G02B 5/26 (2006.01); G02B 5/30 (2006.01); G02B 5/32 (2006.01); G02B 27/28 (2006.01)
CPC G02B 27/0172 (2013.01) [G02B 5/26 (2013.01); G02B 5/3083 (2013.01); G02B 5/32 (2013.01); G02B 27/0176 (2013.01); G02B 27/288 (2013.01); G02B 2027/013 (2013.01); G02B 2027/0159 (2013.01)] 29 Claims
OG exemplary drawing
 
1. An optical system for an augmented reality (AR) display, the optical system comprising:
an image generator for generating image light; and
an optical combiner for location in a field of view of a user of the optical system between the user and a scene, the optical combiner including an optically-powered reflector located at a first side of the optical combiner and a polarisation-dependent reflector located at a second side of the optical combiner, the second side of the optical combiner being opposite to the first side of the optical combiner,
wherein the optical combiner is configured to transmit ambient light from the scene towards an eye of the user, the ambient light being incident on the first side of the optical combiner,
wherein the image generator and the optical combiner are arranged so that the image light is incident on the second side of the optical combiner, and
wherein the optical combiner is configured to reflect the image light so that the image light traverses the optical combiner four times and exits the optical combiner from the second side of the optical combiner, and the optical combiner is configured to transmit the ambient light so that the ambient light traverses the optical combiner only once and exits the optical combiner from the second side of the optical combiner.