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| positive field lens (it is placed at the position of the image formed by the objective; its function is to extend the field of view of the eyepiece) | |||
| field flattener; field lens; flattening lens | |||
| collecting lens; collective lens; positive lens | |||
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Feldlinse : 1 短语, 1 学科 |
| 光学（物理学分支） | 1 |