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6: 幾何光学,測光
6.1: Fermat 原理
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- 像の位置を求める視差法 : 目の位置と垂直に動かした ときに,鉛筆の先が像に対してずれないような位置を 探す.
6.8: レンズを通る光線の経路の幾何学的な描き方
- レンズを通る光線の経路の幾何学的な描き方:a) レン ズの中心を通る光線は屈折しない。b) 光軸に平行な光 線は焦点を通る,c) 屈折後, 初めに平行だった光線どうしは焦点面(焦点を通り光軸に垂直な平面)上で集 まる.d) 平面の像は平面であり,この 2 つの平面はレ ンズの平面上で交わる.
6.9: 光束
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