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principal visual ray |
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principal visual ray [′prin·sə·pəl ′vish·ə·wəl ′rā] (optics) A perpendicular extending from a station point to a perspective plane and theoretically passing exactly along the visual axis of a viewing eye. Also known as principal ray. 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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