| 单词 | optical crown |
| 释义 | optical crownnounan optical glass of low dispersion and relatively low refractive index. It is used in the construction of lenses Words nearby optical crownoptical binary, optical center, optical character reader, optical character recognition, optical computer, optical crown, optical density, optical disc, optical disk, optical double star, optical effects Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 |
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