Kilian's Mirror: New Foucault tester.
PFAFF2@delphi.com
Tue, 18 Apr 1995 22:52:55 -0500 (EST)
> The problem is that the LED is not bright enough.
>
> The only reason I even tried the LED was that I read someone's post
> either here or sci.astro.amateur about using an LED.
>
> I could get the image in focus, and cut into the cone of light, but
> there was NO contrast. The mirror just went uniformly dark.
> And I know that I don't have a spherical mirror from the other tests.
>
> So I'll stop by the surplus junk store, and get a small light bulb to
> use in place of the LED.
>
> Onward Ho!!!
>
> -Alan Kilian
>
>
Try a Mini Mag flashlite bulb and 2 AA cells.
Bob Pfaff