Hi Roderick, thank you.
The globe screen is made of acrylic glass (PMMA). This is the best plastic material concerning the weathering-resistance. My Subsolaris is 13 years old now and is still good-looking and precise.
Kind regards Carlo Heller <http://www.helios-sonnenuhren.de> Am 05.04.2015 um 04:16 schrieb rodwall1234:
Hi Carlo, The reflection dial is lovely. Question: What is the expected life span for the projection screen when placed outside in the rain, snow and sun. Regards, Roderick Wall. Dave Bell <[email protected]> wrote: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 --------------------------------------------------- https://lists.uni-koeln.de/mailman/listinfo/sundial
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