Re: filmscanners: LED Illumination for Film Scanners

[Isaac Crawford <isaac@visi.net>]

Austin Franklin wrote:
> 
> > A couple of years ago someone on the darkroom newsgroup was working on an
> > LED light source for enlarger heads, utilizing clusters of high-intensity
> > LED's. I don't know what happened to the project, but at the time a lot of
> > people were really excited about the technology and the initial results
> > showed a lot of promise.
> >
> > http://www.trailing-edge.com/www/led.html
> 
> Yes, and look at how uneven the lighting is.  For an enlarger, that may turn
> out to be a very bad idea, simply because you can't adjust each individual
> LED for even illumination.  At least with a CCD, you can adjust the gain for
> each sensor element to get even illumination.

        All that you would need to do is shoot this array through some sort of
diffusing device. After all, light bulbs aren't exactly evenly
illuminated and those have been used for years in enlargers...

Isaac