| 单词 | tangential coma |
| 释义 | tangential coma [tan`jen·chǝl `kō·mǝ] OPTICS For a lens that displays coma, the length of a tangent from the vertex of the patch of light formed in the focal plane by rays from an off-axis point to the comatic circle of rays from this point that pass near the edge of the lens. |
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