a plate of glass marked out into concentric zones or rings alternately transparent and opaque, used like a lens to bring light to a focus.
| 单词 | θ64932 |
| 释义 | the world > physical sensation > sight and vision > optical instruments > lens > [noun] > plate of glass used like a lens (1) zone plate1890 a plate of glass marked out into concentric zones or rings alternately transparent and opaque, used like a lens to bring light to a focus. |
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