Characterization of the panoramic annular lens |
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| Authors: | D L Lehner A G Richter D R Matthys J A Gilbert |
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| Institution: | (1) Optical Fabrication Branch, George C. Marshall Space Flight Center, 35812 Huntsville, AL;(2) Physics Department at Northwestern University, 60208 Evanston, IL;(3) Physics Department at Marquette University, 53233 Milwaukee, WI;(4) Mechanical and Aerospace Engineering Department at the University of Alabana, 35899 Huntsville, AL |
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| Abstract: | The panoramic annular lens (PAL) consists of a single piece of glass, with spherical surfaces, that produces a flat annular image of the entire 360-deg surround of the optical axis of the lens. This paper describes the attributes of the PAL and shows that the lens maps elements from object to image space via a constant aspect ratio polar mapping. A panoramic video system (PVS) is described to illustrate how the characterization can be applied in experimental mechanics for cavity inspection and measurement.Portions of this work were presented at the 1995 SEM Spring Conference and Exhibit, Grand Rapids, MI, June 12–14, 1995. |
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