Focal distance, or length, of a lens or mirror
| (Opt.) | the distance of the focus from the surface of the lens or mirror, or more exactly, in the case of a lens, from its optical center. |
See also: Focal
| 单词 | focal distance, or length, of a lens or mirror | ||
| 释义 | Focal distance, or length, of a lens or mirror
See also: Focal |
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