Pinhead mirror
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A Pinhead mirror can be used to create a camera similar to a pinhole camera. Instead of passing through a tiny hole, it is reflected by a small disc shaped mirror (diameter same as that of pinhole). One advantage is that a pinhead mirror can be swivelled to scan a scene or project a scene to different locations.
Pinhead mirror technology is protected under US patent 4,948,211 - "Method and Apparatus for Optical Imaging Using a Small, Flat Reflecting Surface".
For further information see
- TH Nilsson (1986) "The Pinhead mirror: A previously undiscovered imaging device?" Applied Optics, 25, 2863-2864
- TH Nilsson (1987) "Pinhead mirrors: imaging, computing and the nature of light" Pinhole Journal, 4, 2-5.
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