Tuesday, November 19, 2013
Holographic projector zooms without lenses
Laser Focus World: As portable digital devices become more prevalent, small image projectors are becoming more important as well; these typically rely on laser or LED light sources, spatial light modulators (SLMs), and imaging lens systems. Most image projectors (large or small) have a zoom function, which requires a zoom lens with movable elements and the mechanics to move individual elements or their combinations, sometimes at different rates.
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Very cool, I think that this might do a lot for the theatrical media and projection fields. In my experience, one of the limiting factors in using lots of projections in shows is the limited nature of a projector, it is usually a fixed lens with a fairly narrow zoom range, and changing the lens is often impractical. A projector that can have the same versatility as a source 4 zoom or fresnel would be incredibly useful.
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