Claims
- 1. An optical arrangement comprising:
- an input light source;
- a liquid crystal display that is illuminated with collimated light from the input light source;
- a fiber optic faceplate wedge optically coupled to the matrix liquid crystal display;
- a curved reflector optically coupled to the faceplate wedge for producing an output image;
- and wherein the fiber optic wedge corrects for anamorphic distortion exhibited in the reflector and directs light energy into an off-axis entrance pupil to maintain high uniformity over the exit pupil without sacrificing brightness.
- 2. The optical arrangement of claim 1 wherein the liquid crystal display comprises an active matrix liquid crystal display.
- 3. The optical arrangement of claim 1 wherein the curved reflector comprises an off-axis portion of a parabolic reflector.
- 4. The optical arrangement of claim 1 wherein the parabolic reflector comprises an on-axis portion of a parabolic reflector
- 5. The optical arrangement of claim 1 which further comprises:
- a collimating lens disposed between the liquid crystal display and the input light source.
- 6. The optical arrangement of claim 5 wherein the collimating lens comprises a Fresnel lens.
- 7. The optical arrangement of claim 5 which further comprises:
- first and second planar reflectors disposed between the input light source and the collimating lens; and
- a negative lens optically coupled to an output surface of the faceplate wedge.
- 8. The optical arrangement of claim 1 wherein the curved reflector comprises a parabolic reflector.
- 9. The optical arrangement of claim 1 wherein the curved reflector comprises a spherical reflector.
Government Interests
This invention was made with Government support under Contract No. DAAB07-93-C-C502 awarded by the Department of the Army. The Government has certain rights in this invention.
US Referenced Citations (4)