Color prototype laser projector demonstrated

Unfortunately the picture is of their monochrome "cigarette pack" system but Light Blue Optics has recently demonstrated their color system to the editors of Electronics Weekly.

The device uses an active LCD to modulate the three laser beams and generates several images in each color per frame to reduce the "noise" (speckle?) produced.

The image actually leaves the modulator with a narrow divergence angle which is broadened by anything up to 115 degrees by a two-lens group.

A considerable amount of number-crunching goes into driving the LCD, using algorithms developed by the firm.

These algorithms allow the image to be: pointed in any direction within its angular limits, and altered in geometry.

For example, imagining the projector like a small camera standing on a desk, the image could be computed for a vertical screen sitting on the desk, or for the desk surface in front of the projector. Both would be neat, rectangular and focused images, and no change in the optical path would be required to switch between the two.