Digital BW, The Print

> From: Austin Franklin [mailto:darkroom@...]
>
> Having designed a few Bayer pattern imaging devices, with the
> sensor arrays
> I've worked with, the color filter is in fact a separate piece.  That
> doesn't not mean it isn't glued on, but it is in fact a separate
> piece, and
> can be removed.
>
> Also, if they weren't removable, then how is this guy able to do what he
> does:
>
> http://www.irdigital.net/index.html

I've seen diagrams that imply that they deposit dyes right on the chips, but
I suppose it's possible that some chips are made differently from others.
The datasheet for the Sony ICX282AQ, which is the chip used in my Minolta
DiMage 7, clearly says "R, G, B primary color mosaic filters on chip". When
you're dealing with the 7 micron sensors of the 10D (or the 3.4u sensors in
the DiMage 7), I don't see how they could align a mechanical assembly
accurately enough across the whole chip. As to removing the filters, it
wouldn't surprise me if that guy has come up with a way of removing the dyes
chemically, since the underlying chip probably has glass passivation over
it.

--

Ciao,               Paul D. DeRocco
Paul                mailto:pderocco@...