Galileo Telescope - Galileo Telescope

Japanese: ガリレイ望遠鏡 - ガリレイぼうえんきょう

A telescope that uses a convex lens for the objective lens and a concave lens for the eyepiece. The image is erect, and the magnification is equal to the ratio of the focal length of the convex lens to the focal length of the concave lens. Because the field of view is narrow, it is used in small binoculars (such as opera glasses) with a magnification of only 3 to 4 times. It is said to have been invented in the Netherlands around 1608, and Galileo built one himself in 1609 and used it for astronomical observations. → Kepler telescope → Related topic: refracting telescope

Source : Heibonsha Encyclopedia About MyPedia Information

Japanese:

対物レンズに凸レンズ，接眼レンズに凹レンズを使った望遠鏡。像は正立し，倍率は凸レンズの焦点距離と凹レンズの焦点距離の比に等しい。視界が狭いので倍率３〜４倍どまりの小型双眼鏡（オペラグラス等）に使われる。1608年ごろオランダで発明されたといわれ，1609年ガリレイが自作して天体観測に使った。→ケプラー望遠鏡
→関連項目屈折望遠鏡

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