Systems, devices, and methods for astigmatism compensation in a wearable heads-up display
First Claim
1. A method of operating a wearable heads-up display, wherein the wearable heads-up display includes a transparent combiner that positions within a field of view of an eye of a user when the wearable heads-up display is worn on a head of the user, the method comprising:
- generating laser light by at least one laser diode;
anamorphically shaping a spot of the laser light to a non-circular spot shape by at least one anamorphic optical element in order to compensate for an astigmatic effect of at least the transparent combiner on the laser light;
scanning the laser light over the transparent combiner by at least one controllable mirror; and
redirecting the laser light towards the eye of the user by the transparent combiner, wherein redirecting the laser light towards the eye of the user by the transparent combiner includes re-shaping the spot of the laser light to an at least approximately circular spot shape by the transparent combiner.
3 Assignments
0 Petitions
Accused Products
Abstract
Systems, devices, and methods for preventing image astigmatism in wearable heads-up displays (WHUD) with laser projectors are described. A WHUD includes a support structure carrying a laser projector and an eyeglass lens with a transparent combiner. The laser projector includes at least one laser diode, at least one anamorphic optical element, and at least one controllable mirror. The at least one laser diode generates a laser light that, without optical manipulation, would result in an astigmatic, unfocused image at the eye of the user. The at least one anamorphic optical element anamorphically shapes the spot of the laser light to compensate for an astigmatic effect of at least the transparent combiner. The at least one controllable mirror scans the light onto the transparent combiner and the transparent combiner redirects the light towards an eye of a user to create a focused, non-astigmatic image.
-
Citations
7 Claims
-
1. A method of operating a wearable heads-up display, wherein the wearable heads-up display includes a transparent combiner that positions within a field of view of an eye of a user when the wearable heads-up display is worn on a head of the user, the method comprising:
-
generating laser light by at least one laser diode; anamorphically shaping a spot of the laser light to a non-circular spot shape by at least one anamorphic optical element in order to compensate for an astigmatic effect of at least the transparent combiner on the laser light; scanning the laser light over the transparent combiner by at least one controllable mirror; and redirecting the laser light towards the eye of the user by the transparent combiner, wherein redirecting the laser light towards the eye of the user by the transparent combiner includes re-shaping the spot of the laser light to an at least approximately circular spot shape by the transparent combiner. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
Specification