Parabolic mirror made by the rotation method: its fabrication and defects.
One possible method of making a large screen display is to use a virtual image system with a large concave mirror. A concave mirror with a high quality surface can be made inexpensively. A resin, such as an epoxy resin which hardens at room temperatures, is formed into the parabolic shape by a rotating dish. A mirror with a 920-mm diam and a 1150-mm focal length is made, which has sufficiently good characteristics for a virtual image display system. The fabrication and defects of mirrors made by this method are described.
Ninomiya
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