Wearable heads-up display with integrated eye tracker and different optical power holograms
First Claim
Patent Images
1. A wearable heads-up display (“
- WHUD”
) with an integrated eye tracker, comprising;
a laser module including an infrared laser diode to output an infrared light and at least one visible light laser diode to output a visible light;
a scan mirror aligned with an output of the laser module to receive both the infrared light and the visible light and to controllably reflect both the infrared light and the visible light;
a wavelength-multiplexed holographic optical element (“
HOE”
) aligned to receive both the infrared light and the visible light reflected from the scan mirror and to redirect both the infrared light and the visible light towards an eye of a user, wherein the wavelength-multiplexed HOE includes a first hologram that is responsive to the visible light and unresponsive to the infrared light and a second hologram that is responsive to the infrared light and unresponsive to the visible light, the first hologram to apply a first optical power to the visible light and the second hologram to apply a second optical power to the infrared light, and wherein the first optical power is a positive optical power that is greater than the second optical power and wherein the first hologram is oriented to converge the visible light to a first exit pupil having a first diameter at the eye of the user and the second hologram is oriented to redirect the infrared light to a second exit pupil having a second diameter at the eye of the user, the second diameter larger than the first diameter; and
an infrared detector aligned to receive at least a portion of infrared light reflected from the eye of the user.
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Abstract
Systems, devices, and methods that integrate eye tracking capability into scanning laser projector (“SLP”)-based wearable heads-up displays are described. An infrared laser diode is added to an RGB SLP and an infrared photodetector is aligned to detect reflections of the infrared light from features of the eye. A holographic optical element (“HOE”) may be used to combine visible light, infrared light, and environmental light into the user'"'"'s “field of view.” The HOE may be heterogeneous and multiplexed to apply positive optical power to the visible light and zero or negative optical power to the infrared light.
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Citations
10 Claims
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1. A wearable heads-up display (“
- WHUD”
) with an integrated eye tracker, comprising;a laser module including an infrared laser diode to output an infrared light and at least one visible light laser diode to output a visible light; a scan mirror aligned with an output of the laser module to receive both the infrared light and the visible light and to controllably reflect both the infrared light and the visible light; a wavelength-multiplexed holographic optical element (“
HOE”
) aligned to receive both the infrared light and the visible light reflected from the scan mirror and to redirect both the infrared light and the visible light towards an eye of a user, wherein the wavelength-multiplexed HOE includes a first hologram that is responsive to the visible light and unresponsive to the infrared light and a second hologram that is responsive to the infrared light and unresponsive to the visible light, the first hologram to apply a first optical power to the visible light and the second hologram to apply a second optical power to the infrared light, and wherein the first optical power is a positive optical power that is greater than the second optical power and wherein the first hologram is oriented to converge the visible light to a first exit pupil having a first diameter at the eye of the user and the second hologram is oriented to redirect the infrared light to a second exit pupil having a second diameter at the eye of the user, the second diameter larger than the first diameter; andan infrared detector aligned to receive at least a portion of infrared light reflected from the eye of the user. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
- WHUD”
Specification