Optical head is the core device of the optical disk drive. The aperture matching is the most important problems of optical head design.
光学头是光盘存储器的核心部件，光学头光束孔径匹配是光学头设计的一个至关重要的问题。
2
Fibers offer exceptional transmission in tight bends, with a high core-to-clad ratio and numerical aperture of 0.37.
纤维在急弯下提供特殊的传输，具有高核心覆盖比率和0.37的数值孔径。
3
The wire with rubber core conductive seal can through the conductive adhesive and article (metal wire point of contact to penetrate film) fixed in the groove or in aperture.