I found an acrylic lens tooling company website and there was a missile lens. It was conic shaped, 25 inches long , 4 inches diameter parabolic single piece lens.
It was like a corn or conical missile nose.
How does it work , does it look only front or does it work a very long fisheye.
I am sorry , I lost the site .
What kind of a image does it produce , is there a clear visual image on the focus , or does it corrected by computer.