RE: filmscanners: LED Illumination for Film Scanners

["Austin Franklin" <darkroom@ix.netcom.com>]

Yeah, me too, that's why I have that info.  The one I have in front of me is
VCC, and it's called the "ClipLite" and the "CubeLite".  Red, amber, green,
blue, yellow and clear.  For 3mm and 5mm LEDs.

>
> What company made those filters? - I'd like to look up the details (I have
> an extensive electronics data library going back about thirty years that
> includes a very large amount of optoelectronics).
>
> Cliff Ober
>
> -----Original Message-----
> From: owner-filmscanners@halftone.co.uk
> [mailto:owner-filmscanners@halftone.co.uk]On Behalf Of Austin Franklin
> Sent: Thursday, June 21, 2001 5:25 PM
> To: filmscanners@halftone.co.uk
> Subject: RE: filmscanners: LED Illumination for Film Scanners
>
>
>
> > >> Sure you could have done that 15-20 years ago.
> > >> Use filters...red, green and blue filters
> > >> certainly were around 15-20 years ago.
> >
> > HUH???  Please explain to me how to filter monochromatic red
> light from an
> > LED to get blue light. If you can figure out how do that you'll
> > be up for a
> > Nobel prize in physics.
>
> I did post a correction to this yesterday, saying I was thinking of clear
> LEDS, but that is not the emitter color, so it wouldn't work as I
> expected...BUT...I have brochures from back in the mid 80's that offer
> filters for LEDs...in varying colors, and one of the colors IS blue.
>
>