Dürer & 測距儀2022d135 教科書風 e041 物体の速度測定 後半 second halfの 03 カメラへの光線

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点大きさじゃ　光線は通過できませんが これは　デカルト座標空間での　思考用です

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in Cartesian coordinate space, we can consider the focus position as a point size for conceptual purposes, even though in reality, rays cannot pass through a point size.

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ホンモノ　ピンホールカメラだと 穴を通過した光線が　拡がり 平面スクリーンに痕跡を残します

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In a real pinhole camera, the rays passing through the hole diverge, leaving traces on a flat screen.

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エンジニアなら 焦点からの　方向違いに進む光線複数を 同時刻に　スクリーンに　ぶつけたい だから　球面スクリーンを用意する

2022zionad @2022zionad

If you're an engineer, you'd want to direct multiple rays diverging from the focus in different directions simultaneously to hit the screen at the same time. That's why you would prepare a spherical screen.

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ここまで話の仕組み　 展開理由が　わかった数学者なら どうするでしょう

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If you are a mathematician who understands the structure and reasoning behind the discussion so far, what would you do?

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光線複数が　焦点に辿り着くまでは 光線先端の動きを 実数デカルト　３次元座標空間に描き

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Until multiple rays converge at the focal point, draw the movement of the tips of the rays in the real number Cartesian 3D coordinate space.

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焦点通過後は　複素空間にすれば 球体球面スクリーンの半径を ０長さとか １長さに　 できるんでは　ないでしょうか

2022zionad @2022zionad

After passing through the focus, if we use complex space, can't we set the radius of the spherical screen to be 0 length or 1 length?

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東京　渋谷は　今年の初雪

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Tokyo Shibuya had its first snowfall of the year this year.

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