[SML] Laser projection for white stars

[PJ Veltri]

The Sharelife one on Amazon appears to have a White LED source if you
believe the reviews.

PJ

On Mon, Feb 13, 2023 at 2:35 PM *Hobbit* via Stagecraft <
stagecraft at theatrical.net> wrote:

> The other problem with "white" is that it's usually a mix of wavelengths,
> and if the effect-generator does *anything* with diffraction you get a
> spread of the wavelengths, i.e. little sets of R/G/B dots.  If this is the
> "Sharelife" unit I managed to search up, the supposed "output" does have a
> pattern, and it looks like it's a *de-saturated* photo of what we'd more
> ordinarily expect from a typical double-diffraction projector.
>
>     http://techno-fandom.org/~hobbit/lighting/laserspray/
>
> One way I've seen "stars" done is with seriously fast scanning and
> modulation,
> turning the (full) beam on for a very short line in various directions
> across
> a set of points, making a little six or eight way "splat" around each
> point to
> make it look more "star" like than just a dot.  Something of that
> capability
> isn't going to come from fleabay for $200, especially if backed by software
> that could make those points move around and stay in self-alignment.
>
> And yeah, a genuine 2 or 5 watts is a lot.  So easy to have these days,
> where
> not that long ago it took 208 3-phase, a rack of 2N3055s the size of
> Delaware,
> and water cooling...
>
> _H*
>
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