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Looking at the last video posted by dsholz, I'm 99% sure that this display is interlaced, to the same spec as the old CRT's. It makes sense for several reasons, not the least of which is that 60Hz 480i video, being the once-ubiquitous old NTSC standard, avails the manufacturer of a huge pool...

That is your cornea/lens fluorescing. This effect resembles glare, and I find that it goes away when I put my glasses on, which block most of 365nm.

I noticed this effect some time ago with blue LED lights and some red glasses. I agree with the others, don't do around the house unless you are prepared to do some vacuuming afterwards :P

Not quite. Diode Source: A130 Driver: FlexDrive V5 Current: ~550ma Lens: Aixiz 405 Glass Power: ~300mw (judged by heat on skin compared to other known power units, no LPM) Host/ Heatsink: Dorcy Metal Gear with Aluminum custom sink Run Time: <1 hr Status: Alive This setup is currently running...

Re: FS: 3 @ 445nm Lasers (1.2W, 1.1W, & 850mW) Tempting! These are nice-looking builds. I'd be after that 1.2W beast yesterday, were I not committed to a build of my own with the diode I got from you last month.

Seconded... welcome to the 445nm party, IgorT! Incidentally, Igor, do you think that you can still say "no duty cycle" about these beasts in your hosts? I'm planning a build of my own in a substantially larger host (a PGL-III-C), and may boost my target power if 1W is still reasonable in...

That sounds like a tiny amount of emission at a completely different frequency, like the bit of yellow that comes out of blu-rays. I know I can see at least 808nm, and at least part of the emissions from certain IR LED's mounted on nightvision cameras, in the dark. I don't know what the common...

Ah, that's where those rep points came from. :thanks: guys! This is based on the assumption of a visually perfect lens/cornea, it is worth noting; the "dot" on the retina isn't going to be that tiny for most of us. Ironically, astigmatism acts as a mild sort of built-in protection, as it...

Chromatic aberration is why it's fuzzy (for most of us, our eyes are optimized to focus on red to green wavelengths, as we have highest acuity with these wavelengths); eyestrain and squinting from trying to focus on 405nm is my guess for the cause of the headaches.

If you are seeing a dot surrounded by violet "fuzz", odds are that the fuzz is the actual 405nm, while the visible dot is a touch of longer-wavelength fluorescence from the surface itself. This is due to chromatic aberration; most people's eyes will focus for maximum sharpness in the red-green...

I find that 405nm is more purple-violet at low levels, but a more bluish violet when bright (such as when seeing the dot). This can vary with low-level fluorescence from the surface contributing other hues, watch out for that. 445 is comparable; pure blue at the dot, but taking on a violet-ish...

Does he mean this Mitsubishi? Would like to know where those are around for $210... (side note: why are links the same color as the text? "this Mitsubishi?" above is a link.) Edit: ah, there she be, right above this post. thanx PontiacG5

That depends on how much power is in a single pulse. Obviously, a 1W laser that has a 0.5% duty cycle averages out to 5mW actual power. However, if it's running at 5 millihertz, the "on" pulses are one second long, at 1W more than enough to damage the eye. So at lower frequencies, this is...

That's because looking at the dot "crushes" your eye's response, and all you see is the blue. To really detect subtle hue differences, you have to look at much more muted versions of the light, in the middle of the eye's response curve. In my case, I could see the hue differences between the...

Ah, that makes sense.... PWM is mainly a way to throttle back a diode, not push it (not that there won't be people doing that :evil:), and now that we've finally found a diode that's just TOO powerful for some applications, there's some interest there. Along these lines: I don't know whether...

The discussion in this thread on low power usage for 445nm diodes, which lase at a minimum 200mA or so, leads me to this question for our driver experts. To me, the best option for operating this diode at low powers, given the minimum lasing current and very low efficiency at those currents...

I've wondered about that, whether frequency in power drivers is hard to get over 100 Hz without putting out for pricier components and/or more complex designs. But I've not done flashlight builds, and so am less familiar with LED-oriented drivers and the obstacles to building high-frequency...

By "Spectrum" I take it you mean gamut? If so, you can approximate your gamut by using a CIE color diagram. Find the laser wavelength of your primaries on the outside of the curve and mark them, and then draw straight lines between them. That is the gamut, the range of hues that is possible...

I do this sort of thing by shining them into one side of an opaque white globe lamp and noting the mixed color on the other side. With my ~200mW (estimated) 445nm blue and a 256mW IgorT red build, I get a nice even magenta color. When I combine the 650nm with an IgorT 360mW bluray, what I get...

That's a function of the PWM frequency. Obviously, a 1W peak PWM 445nm laser with a 10% duty cycle but a 1 Hz frequency is still delivering a 100ms pulse of 1W power, which is plenty dangerous. At a sufficiently high frequency such that each individual pulse does not exceed that total energy...