V2EX slow axis

Slow Axis

释义 Definition

(光学)慢轴:在双折射材料(如波片、晶体、光纤)中,沿某一主轴方向传播的偏振光有效折射率较大、传播速度较慢,因此相位延迟更大;该方向称为慢轴。(常与 fast axis“快轴”相对;在不同领域也可能有引申用法,但最常见的是偏振/双折射语境。)

发音 Pronunciation (IPA)

/slo kss/

例句 Examples

Align the polarizer with the slow axis of the wave plate.
将偏振片与波片的慢轴对齐。

If the input polarization is set at 45° to the slow axis, the birefringent crystal introduces a phase delay that can convert linear polarization into elliptical polarization.
如果输入偏振方向与慢轴成 45°,双折射晶体会引入相位延迟,从而可能把线偏振转换为椭圆偏振。

词源 Etymology

slow 表示“慢的”,axis 表示“轴/主轴”。在双折射介质里,不同偏振方向对应不同折射率;折射率更大意味着相速度更小,因此该主轴被称为 slow axis(慢轴),用来直观区分两条相互正交的“主传播方向”(慢轴与快轴)。

相关词 Related Words

文献与作品 Literary / Notable Works

  • Optics(Eugene Hecht)在偏振与波片章节讨论快轴/慢轴与相位延迟。
  • Principles of Optics(Born & Wolf)在晶体光学、双折射与主轴概念中涉及慢轴相关表述。
  • Fundamentals of Photonics(Saleh & Teich)在偏振器件与双折射材料内容中使用快轴/慢轴术语。
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