Patent ID: 11927768
Assignee: 3M INNOVATIVE PROPERTIES COMPANY
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A display system comprising:
a projection lens system having one or more lenses centered on an optical axis;
a light guide comprising:
a light insertion portion adapted to receive light;
a light transport portion disposed to receive light from the light insertion portion; and
a light extraction portion disposed to receive light from the light transport portion, the light extraction portion configured to provide a light output central ray direction having an angle with respect to the optical axis that varies with location on an output surface of the light extraction portion, the light extraction portion being separated from the light insertion portion along the optical axis forming a space between the light extraction portion and the light insertion portion; and

a spatial light modulator in optical communication with the light extraction portion,
wherein the light guide is folded such that the light extraction portion faces the light insertion portion.