Femtoprojector optical systems
First Claim
Patent Images
1. A femtoprojector optical system for projecting an image produced by an image source to a retina of a user'"'"'s eye, the femtoprojector optical system comprising:
- a convex secondary mirror facing the image source, where image-forming rays from the image source are incident on and reflected by the secondary mirror;
a concave primary mirror facing the secondary mirror and further reflecting the image-forming rays from the secondary mirror, the secondary mirror and primary mirror cooperating to project the image from the image source;
a light baffle system that includes an obscuration, the obscuration blocking stray rays from the image source that are not reflected by the secondary mirror; and
a solid transparent substrate with the primary mirror on one end of the substrate and with the secondary mirror on an opposite end of the substrate;
where the femtoprojector optical system is small enough to mount in a contact lens wearable by a human user.
2 Assignments
0 Petitions
Accused Products
Abstract
A variety of femtoprojector optical systems are described. Each of them can be made small enough to fit in a contact lens using plastic injection molding, diamond turning, photolithography and etching, or other techniques. Most, but not all, of the systems include a solid cylindrical transparent substrate with a curved primary mirror formed on one end and a secondary mirror formed on the other end. Any of the designs may use light blocking, light-redirecting, absorbing coatings or other types of baffle structures as needed to reduce stray light.
-
Citations
23 Claims
-
1. A femtoprojector optical system for projecting an image produced by an image source to a retina of a user'"'"'s eye, the femtoprojector optical system comprising:
-
a convex secondary mirror facing the image source, where image-forming rays from the image source are incident on and reflected by the secondary mirror; a concave primary mirror facing the secondary mirror and further reflecting the image-forming rays from the secondary mirror, the secondary mirror and primary mirror cooperating to project the image from the image source; a light baffle system that includes an obscuration, the obscuration blocking stray rays from the image source that are not reflected by the secondary mirror; and a solid transparent substrate with the primary mirror on one end of the substrate and with the secondary mirror on an opposite end of the substrate; where the femtoprojector optical system is small enough to mount in a contact lens wearable by a human user. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
-
Specification