1. (optics) defect in an optical system in which light rays from a single point fail to converge in a single focal point. 
   （光学）光学仪器不能使光线集中。
2. multichannel quantum defect theory 
   多通道量子数亏损理论
3. A refractive defect of a lens or other optical system that prevents light rays from converging at a single point, resulting in a blurred or imperfect image. 
   散光有折射缺陷的透镜或其它光学系统，阻碍光线汇聚于一个焦点，形成一个模糊或不完全的图象
4. A visual defect in which the unequal curvature of one or more refractive surfaces of the eye, usually the cornea, prevents light rays from focusing clearly at one point on the retina, resulting in blurred vision. 
   乱视，像散一种视力缺陷，眼球表示面一点或多点折射时屈光不均，通常为角膜，使光线不能清晰地在视网膜上聚为一个焦点，从而导致视力模糊不清
5. A deficiency or defect. 
   不足或缺点

查看更多例句 相关情景会话

• 1. 点缺陷
  缺陷defect, imperfection, + R, `& l; U6 B( @: \/ h$ f...点缺陷point defect,1 Z6 u7 p" H- Y% Q9 Y2 ?3 J! n...线缺陷 line defect, dislocation,
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• 2. 因此一个点状缺陷
  电磁波在空间分布上只能局限在杂质附近，因此一个点状缺陷(point defect)相当于一个微空腔(micro-cavity) 。如果像图3一样接连制造几个点状缺陷，...
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• 3. 點缺陷
  POGO針頭point defect...點缺陷point method...逐點計算法point-and-shoot camera
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• 4. 点欠陥
  point contact diode点接触ダイオード...point defect点欠陥...pointed先細（の）
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