Ronald W. Garrison<rwgarr@intrex.net> wrote: >through the entire raster. For a 1000x1000 image, the amount of time that >the laser spends on any single spot should be something like one >*millionth* of the total time. This means that the intensity of the light >at any point on your retina will have a *very* high peak-to-average ratio. TVs get a little help from phosphor decay, but to be any good a TV phosphor has to decay faster than the picture rescans. This is true for computer monitors as well. >So although your conscious perception may be that the brightness is not >that high, any given receptor in your retina will get hit with some pretty >energetic, though brief, pulses of light. A little more than the photons coming off my computer monitor now, maybe. >millisecond or so. If you were scanning the raster at, say, 50,000 times >per second, you could expect the eye to pretty much average things out. But >if we're talking the usual figure of maybe 50-100 x per second, I could see >some chance of problems of the type I've described. Maybe not even outright >eye damage, but perhaps excessive vision fatigue. Maybe they should be using higher scan-rates, then. With the much shorter horizontal beam skews, and the micromirror steering system they're using, it could be possible. >lying entirely within the triangle. You'd need new standards to cover the >use of this new mapping, but the only real burden would be that your actual >display would need to have six real, primary colors. That's where the cost >would be. It's uglier than just following the CIE diagram. The eye doesn't even see all those colors. It sees three basic distributions of colored photons and interpolates. Three "evenly-spaced" primary colors fakes it out okay, but there's a lot we're missing and a lot of inefficiency we incur by not having more sensors of our own. >And of course, those head-mounted displays could ultimatley be just ideal >for keeping those costs contained. I wonder if we could use the micromirrors and some sort of photonic prism steering to create a full-spectrum effect. We'd need to start with a highly collimated white-light source, though, which jacks up the running temperature a bunch... --Blair "3-D color night x-ray vision that can see into the future!"
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