波面収差

wave aberration

[目次：レンズ系]

収差のない理想結像(ガウス結像)における波面Wと実際の結像の場合の波面Sとのずれを波面収差という。もう少し正確には、幾何光学的に考えた電子軌道に沿って測った波面Wから波面Sまでの光路差を言う。高分解能像の解釈で扱われる波面収差は通常、軸上収差(球面収差と寄生収差)に由来する収差である。

The difference between the wavefront W of ideal imaging with no aberrations (Gauss imaging) and the wavefront S in actual imaging with various aberrations is called “wave aberration.” It is defined as the optical path difference between wavefronts W and S measured along an electron trajectory given by geometrical optics. The wave aberrations neccessary for the interpretation of a high-resolution image are axial aberrations (spherical aberration and parasitic aberrations).

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