From: Kerik (Kerik@Kerik.com)
Date: 11/27/02-11:24:08 AM Z
Jeff,
The ruby may not block enough of the visible light that the integrator
is responding to. If that's the case, maybe try a 3-stop neutral
density gel filter? Or even 2 of them if necessary? You may be able to
get 2 or more of them out of one 3" gel, depending on the diameter of
the probe.
Kerik
>
>I wonder how it would be to cut a little disk of rubylith
>and place it over the sensor disk? This would mask the spectrum very unevenly
>(the lamp is rated at 5200K), but do you agree with me that that should not
>matter as long as the uneven-ness is consistent? I mean, pt/pd does not
>respond to red light, but presumably the sensor cell of this integrator does.
>I'm gonna try this unless you or someone figures it's an essentially stupid
>idea.... Happy Thanksgiving to the List! -JB
>
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