Millburn IP PLLC
Optical device having reduced diffraction artifacts for eye-tracking
An optical device and an eye-tracking system to suppress a rainbow effect are provided. The optical device includes a grating. The grating includes at least one substrate and a grating structure coupled to the at least one substrate. The grating structure is configured to diffract an infrared light beam and transmit a visible light beam with a diffraction efficiency less than a predetermined threshold.
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Mengfei Lu Yun-Han Fenglin Junren
Wang Lu Lee Peng Wang