Wow, a blast from the past there, Jim! I remember "Solar Skreen", lol. Worst resolution ever, it wasn't even close to diffraction limited. Wasn't the material dimpled? But I think Tuthill was the first to actually popularize mylar. On 9/7/11, Jim Stitley <sitf2000@yahoo.com> wrote:
Years ago Roger Tuthill used 2 nesting aluminum pie pans with holes cut out and the material wedged in between. I do NOT KNOW if he had any patent on it or not, but don't think so. ALSO, be sure you have the right type of flexible mylar film to protect the eyes. Chuck Hards might be able to advise. Not all mylar is safe. Tuthill sandwiched 2 sheets together I think with the silvered sides facing one another to prevent scratching and leaking sunlight. Be SURE to a fix the material and pie pans so there is NO chance thay might separate at the wrong time. Best to epoxy together. Then find a round plasrtic lid pie cover to store it in. Good Luck and Be Sure and Be Safe!!!