Systems, devices, and methods employing waveguides embedded in curved lenses

A wearable heads-up display (WHUD) comprising:

• a support structure that in use is worn on a head of a user;
• a display light source to provide display light, wherein the display light source includes a first source of a red light, a second source of a green light and a third source of a blue light;
• and
• a transparent combiner carried by the support structure and positioned in a field of view of an eye of the user when the support structure is worn on the head of the user, the transparent combiner oriented to receive the red light, the green light, and the blue light from the display light source, and the transparent combiner comprising:
• a lens having a first major surface and a second major surface, the second major surface of the lens opposed from the first major surface of the lens across a thickness of the lens, at least one of the first or the second major surfaces of the lens having a curvature that imparts at least one of a positive optical power or a negative optical power;
• a planar waveguide having a first major surface and at least a second major surface, the second major surface of the planar waveguide opposed from the first major surface the planar waveguide across a thickness of the planar waveguide, the thickness of the planar waveguide less than or equal to 0.3 mm, the planar waveguide to propagate each of the red light, the green light, and the blue light therethrough by total internal reflection;
• and
• a first layer of a low reflective index material located between at least a portion of the first major surface of the lens and at least a portion of the first major surface of the planar waveguide, wherein a ratio of a refractive index of the planar waveguide and a refractive index of the first layer of the low refractive index material is greater than or equal to 1.8 to provide a maximum reflection length of less than or equal to 1.4 mm for the red light inside the planar waveguide.