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arXiv 0812.2979math-phmath.MP
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通过几何代数进行射线追踪和纵向成像的Poisson交换子-反交换子括号

Poisson commutator-anticommutator brackets for ray tracing and longitudinal imaging via geometric algebra

Quirino M. Sugon, Daniel J. McNamara

摘要:

利用几何代数中的向量楔积证明了Poisson换位子括号度量了相空间面积的保持性。我们还使用矢量点积来定义泊松反换位子括号,以衡量相空间角的保存。我们将这些括号的傍轴双正交复杂的高度-角度射线向量,通过一个2x2的矩阵变换,我们表明,这种变换保留的领域,但不相空间中的角度。这里的泊松括号用ABCD矩阵的系数表示。我们还将这些括号应用于从光学系统的输入侧和输出侧测量的距离-高度射线向量。我们表明,这些向量服从部分Moebius变换,这种变换既不保留面积,也不保留角度。泊松括号在这里表示的横向和纵向放大率。

英文摘要:

We use the vector wedge product in geometric algebra to show that Poisson commutator brackets measure preservation of phase space areas. We also use the vector dot product to define the Poisson anticommutator bracket that measures the preservation of phase space angles. We apply these brackets to the paraxial meridional complex height-angle ray vectors that transform via a 2x2 matrix, and we show that this transformation preserves areas but not angles in phase space. The Poisson brackets here are expressed in terms of the coefficients of the ABCD matrix. We also apply these brackets to the distance-height ray vectors measured from the input and output sides of the optical system. We show that these vectors obey a partial Moebius transformation, and that this transformation preserves neither areas nor angles. The Poisson brackets here are expressed in terms of the transverse and longitudinal magnifications.

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