Millimeter-wave dielectric lens antenna is a kind of aperture antenna with high directivity.

毫米波介质透镜天线是一种高方向性的口径天线。

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The reflection effect of the spherical surface of a hemisphere solid immersion lens (SIL) has been investigated using the vectorial diffraction theory for high numerical aperture systems.

应用高数值孔径系统的矢量衍射理论研究了半球形固体浸没透镜(SIL)球面表面的反射对SIL系统透射场的影响。

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By this way we can design high diffraction efficiency, as well as lager numerical aperture diffractive lens under current machine fabrication condition.

该方法在现有衍射透镜加工设备分辨率条件下，可提高衍射透镜的衍射效率，增大衍射透镜的数值孔径。

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The camera's iHS technology and the large-aperture lens work together to deliver high-sensitivity, low noise and blazing auto-focus performance that translates to the highest image quality of any Olympus compact camera.

ENGADGET: Olympus Stylus XZ-2 is a digital compact stuck in a mirrorless camera's body, we go hands-on

It features a 1.2MP front camera for video conferencing and an 8MP rear camera with a large F2.2 aperture, 5-element lens allows for high quality images along with HD video recording.

ENGADGET: ASUS rebrands its tablets 'Transformer Pads,' announces the high-end Infinity Series with either Tegra 3 or Snapdragon's S4 chip

This high performance, interchangeable zoom lens features an F2.8 maximum aperture throughout its entire 15-45mm zoom range and is designed for exclusive use with the PENTAX Q-Mount line of digital cameras.

ENGADGET: Pentax launches Q10 interchangeable lens camera, K-5 II and K-5 IIs flagship DSLRs