3-D HLCD system and method of making
An autostereoscopic three-dimensional liquid crystal display system and a method of making the system. The system includes a collimated backlight, a first light diffracting hologram, a second right-left interlacing hologram and a liquid crystal display. If the backlight is not collimated, a micro-collimator array is used to collimate the backlight prior to passing into the first hologram. The second right-left interlacing hologram is formed through a two step process. The process comprises positioning a photolithographic mask and a view region mask in a first position, recording the first holographic recording in the first position, shifting the photolithographic mask and the view region mask to a second position and recording the second holographic recording in the second position.
1. A method of making an interlaced waveguide hologram master comprising:
forming a first holographic recording by positioning a photolithographic mask at a first position over a substrate coated with emulsion and indexing fluid;
positioning a view region mask in a corresponding first position;
forming a second holographic recording by positioning the photolithographic mask at a second position over the substrate coated with emulsion and indexing fluid; and
positioning the view region mask in a corresponding second position, wherein the second holographic recording is interlaced with the first holographic recording, the view region mask comprises a series of blacked out regions separated by a distance of approximately 2.5 inches; and each of the photolithographic and viewing masks has a series of light transmissive openings having selected inter-distance between the light transmissive openings.
2. The method of claim 1 , wherein the first position corresponds a to a right viewing field and the second position corresponds to a left viewing field.
3. The method of claim 1 , wherein the photolithographic mask comprises a series of equally spaced lines, wherein predetermined lines mask holographic recording.
4. The method of claim 3 , wherein each line has a width approximately equal to the width of a standard pixel.
5. The method of claim 4 , wherein the width of each line is between approximately 200 to 300 microns.
6. The method of claim 1 , wherein the emulsion is formed of silver halide.