Dear Tom,
So far on the list, various suggestions have addressed simulating the
angular size of the sun's apparent disk as a source, but if you are
interested in the geometry of the actual dial-style system as a whole, you
must deal with the problem of the optical distance of the sun. For
examp
Tom Kreyche wrote:
>
>Seattle's long and rarely sunlit winter has begun in earnest. I'm
>experimenting with building dials and want to test the ability of different
>gnomon designs to cast shadows.
>
>Does anyone have ideas on building simulated sources of sunlight? I'm
>guessing a reasonable a
At 11:03 28-11-97 -0800, you wrote:
>Seattle's long and rarely sunlit winter has begun in earnest. I'm
>experimenting with building dials and want to test the ability of different
>gnomon designs to cast shadows.
>
>Does anyone have ideas on building simulated sources of sunlight? I'm
>guessing a
Tom Kreyche <[EMAIL PROTECTED]> asked about simulating the sun for the
purpose of illuminating a sundial on a cloudy day (or indoors?).
Several companies make solar simulators, but they match the spectrum of
the sun, not the angular distribution of its radiation. What you need
is a bright, disk-
