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直径：2mm；焦距：1.47mm
材料：精退火K9光学玻璃
设计波长：587.6nm
直径误差：+/- 0.005mm
椭球度：±0.003mm
面型不规则：波长/4 @632.8nm
表面光洁度：3~4级
镀膜：无
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