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principal plane |
Also found in: Dictionary/thesaurus, Medical, Hutchinson | 0.03 sec. |
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principal plane [′prin·sə·pəl ′plān] (mathematics) For a quadric surface, a plane that passes through the midpoints of all the chords perpendicular to it. (optics) Two planes perpendicular to the optical axis such that objects in one plane form images in the other with a lateral magnification of unity. The vertical plane passing through the internal perspective center and containing the perpendicular from that center to the plane of a tilted photograph. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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principal meridian principal mode principal moments principal normal principal normal indicatrix principal normal section principal part principal plane principal plane of stress principal point principal quantum number principal radii principal radii of normal curvature principal ray principal root |
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