Thanks for the tip. I was thinking about seeing how I can improve it after I do some testing. One thought was to put a ceramic tile at the base to help it retain heat. As it sits, the pots would be sitting on plywood.
OP could have a seperate cooking box and the parabolic reflectors aimed at it. this could make pizza.
Use a convex lens from an old rear projection TV Look up solar scorcher
Were you thinking in the means of replacing the top pane of glass with a convex lens?
Making a correction, it's a fresnel lens.
I would build it as a separate device to point at the oven as a booster.
Definately provide some type of thermal mass inside. It will carry heat through passing clouds and prevent large temp swings. Ceramic tiles would be a good upgrade.
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