RE: filmscanners: LED Illumination for Film Scanners

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

> I'm familiar with VCC, having spec'd their products many times over the
> years. The early blue (and green) lenses were intended for use with small
> incandescent bulbs with the same T1-3/4 form-factor that was
> adopted by LED
> manufacturers, not for use with LEDs.

Not the ones I was referencing.  They specifically say "Lensmounts for 3mm
and 5mm LEDs".  The catalog is titled "LED Lenses and Mounting Components".

Here is a scan of the VCC sheet for the ClipLite from this catalog (dated
4/92):

http://www.darkroom.com/MiscDocs/VCCClipLite4LEDs.jpg

I believe the timeline you previously claimed for when blue LEDs were
available is possibly wrong.  At least according to the LED Museum link you
provided in the same post.  It appears it is white LEDs that were available
about five years ago (1996).  Blue LEDs appear to have been available
somewhat early in the 1990s.

That would make sense that these LED covers were intended (though it's not
stated they were) for like colored LEDs.  If blue covers were for blue LEDs,
that would make sense that blue LEDs would have been reasonably available at
the latest by very early 1992 (when the VCC catalog shows blue covers), if
not a year or more before.