Fresnel's rhomb

名词 n.
中文释义

英文释义

名词 n.
  1. A rhombus or oblique parallelopiped of glass cut so that a ray of light entering one of its faces at right angles shall emerge at right angles at the opposite face, after undergoing within the rhombus, at other faces, two reflections. It is used to produce a ray circularly polarized from a plane-polarized ray, or the reverse.
    — In Fresnel’s rhomb, whatever be the colour of the light, the retardation of the phase is exactly 90°, or the corresponding retardation in space is exactly ^λ⁄₄ whatever the value of λ may be.

词形变化

Fresnel's rhombs plural

词源

Designed in 1817 by Augustin-Jean Fresnel.
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