1 Jul
2010
1 Jul
'10
4:34 p.m.
On 01/07/10 20:11, Tony Duell wrote:
Err, yes... But if I am setting up the optics in a
laser printer scanner,
I want to be able to dtect where the beam is (roughly) going and then
tweak the lenses/mirrors to get it where I want it.
Indeed. It's even more useful to get an instant response when you're
setting up the focus...
Getting down to 0.08mm is going to be interesting, what with
beam-scatter and fluorescence. And I really don't like the idea of using
a focus-finder to set it up... viewing a laser through a magnifying lens
seems like a really dumb idea to me, even with safety goggles.
"Fun".
And no, Ektachrome IR isn't available any more -- it was discontinued a
few years ago. Ilford SFX is, but that isn't technically an IR film;
it's sensitive to short-wave IR, but also sensitive to natural light,
and is basically insensitive to long-wave IR (heat-IR)...
--
Phil.
classiccmp at philpem.me.uk
http://www.philpem.me.uk/