Digital BW, The Print

If it is a white Led, some do have a continuous spectrum. Nichea Co.
makes them for instance. 
 If it is a Led array, it is also possible to cover the full spectrum
given appropriate #s of color points,appropriate half bandwidths,
techniques of multiples on at same time, and possibly manipulating
multiple Led power outputs. It's not all that difficult to emulate
some of the well known instruments as even they only sample slices of
the spectrum and interpolate the rest in many cases. 
 There is a great deal of activity going on in this area these days as
witness the last few years patent literature on the topic. The gap
between spectros,colorimeters etc is closing rapidly.
 Even the Colorvision instrument(Datacolor 2005 I think?) seems to
work well at it's task and it, if one of CD Tobys early comments when
it was introduced is accurate, uses a rather small # of Leds(6 I think
was mentioned).

Regards
Duane



--- In DigitalBlackandWhiteThePrint@yahoogroups.com, <prep@...> wrote:
>
> Using LEDs would be a big cost cutter, but you no longer have
> a continuous spectrum. Bad news if you change inks.
> 
> -- 
> Paul Repacholi                               1 Crescent Rd.,
> +61 (08) 9257-1001                           Kalamunda.
>                                              West Australia 6076
> comp.os.vms,- The Older, Grumpier Slashdot
> Raw, Cooked or Well-done, it's all half baked.
> EPIC, The Architecture of the future, always has been, always will be.
>