Need extreme thermal performance? consider our new Vacuum Focus Mirror option (US Patent 9575222).
This is a 4’ square rigid aluminum composite mirror with rear aluminum reinforcing frame. Shatterproof.
Mirror is Vacuum Adjustable using Vacuum Pump (not included). Adjust Pseudo-Parabolic reflection, usable focal lengths 6M (20 feet) to 30M (100 feet) or more.
Focal spot size: 13 cm (5 inches) at 20 meters (65 feet).
You can semi-permanently deform the mirror to retain the focal distance you want. Then open the air vent to the atmosphere. Result: your focus remains set, even as atmospheric pressure naturally varies throughout the day.
Note: Must be ordered with H1 heliostat. Not available separately.