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Wedge prism The wedge prism is a prism with a shallow angle between its input and output surfaces. This angle is usually 3 degrees or less. Refraction at the surfaces causes the prism to deflect light by a fixed angle. When viewing a scene through such a prism, objects will appear to be offset by an amount that varies with their distance from the prism. ==Deflection angle==
For a wedge prism in air, rays of light passing through the prism are deflected by the angle δ, which is approximately given by : where ''n'' is the index of refraction of the prism material, and α is the angle between the prism's surfaces.
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Wedge prism」の詳細全文を読む
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