Hi Dave,
thank you, I am glad that you like my sundial.
The concave mirror is made of glass coated by high-reflective aluminium
and quartz for protection. The focal length is 150mm like the radius of
the globe.
The projected picture of the sun shows the subsolar point on the globe.
I have designed the globe for Europe therefore I cannot make a HELIOS
Subsolaris for California. Sorry.
Kind regards
Carlo
<http://www.helios-sonnenuhren.de>
Am 04.04.2015 um 21:04 schrieb Dave Bell:
Carlo, that is a beautiful dial and seriously interesting concept for a
reflecting design! The manufacturing process is very clever, with the laser
and NC machining of the spherical dial face. Perfect for automating the
localization and any customization required.
Is the concave mirror stainless steel? It appears as if your process
measures the focal length after polishing.
Can you customize your design for outside of Europe? I'd be tempted to
enquire about one for California, but I suspect the cost would be outside my
budget. :{)
Dave
-----Original Message-----
From: sundial [mailto:[email protected]] On Behalf Of Helios
Sonnenuhren (Carlo Heller)
Sent: Friday, April 03, 2015 11:18 PM
To: [email protected]
Subject: Re: Reflecting Dials
Dear Claude,
if you are looking for reflecting dials other then ceiling dials this
dial may be interesting for you:
http://www.helios-sundials.com/Helios-Sundial-Gallery.html
Kind regards
Carlo
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