OPTICAL SYSTEMS WITH LIGHT-EXPANDING COUPLERS

An electronic device may include a display that generates light for an optical system that redirects the light towards an eye box. The optical system may include a waveguide, a non-diffractive input coupler, a cross coupler, and an output coupler. The cross coupler may expand the light in a first di...

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Bibliographic Details
Main Authors PFEIFFER JONATHAN B, OH SE-BAEK, AIETA FRANCESCO, URNESS ADAM C, SCHLOTTAU FRISO
Format Patent
LanguageChinese
English
Published 15.10.2021
Subjects
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PHYSICS
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Summary:An electronic device may include a display that generates light for an optical system that redirects the light towards an eye box. The optical system may include a waveguide, a non-diffractive input coupler, a cross coupler, and an output coupler. The cross coupler may expand the light in a first direction. The cross coupler may perform an even number of diffractions on the light and may couple the light back into the waveguide at an angle suitable for total internal reflection. The output coupler may expand the light in a second direction while coupling the light out of the waveguide. The cross coupler may include surface relief gratings or holographic gratings embedded within the waveguide or formed in a separate substrate. The optical system may direct the light towards the eye box without chromatic dispersion and while supporting an expanded field of view and optical bandwidth. 一种电子设备可包括为光学系统产生光的显示器，该光学系统将光朝向眼箱重定向。该光学系统可包括波导、非衍射输入耦合器、交叉耦合器和输出耦合器。该交叉耦合器可在第一方向上扩展光。该交叉耦合器可对光执行偶数次衍射，并且可以以适于全内反射的角度将光耦合回到波导中。该输
Bibliography:Application Number: CN202080018199