concave grate meaning in English

凹板筛
凹板栅格

Abney mounting for concave grating
阿布饰凹面光栅装置
Concave grating spectrometer
凹表光栅分光计
The hybrid method can simulate accurately both the imaging and polarization - dependent diffraction characteristics of a concave grating . to meet the growing need for flattened passband in a practical wdmsystem , three design methods , namely , the tapered output waveguide structure with air - slots , the three - focal - point method and the analytical method of spatial phase modulation , are introduced to achieve a passband - flattened diffraction grating device
针对实际光通信应用中对通带带宽的需求，本文提出了“结合空气槽的渐变输出波导结构方法” 、 “三焦点方法”及“显式公式空间相位调制法”三种使平面集成型衍射光栅波分复用器件获得平顶型频谱响应的优化设计方法。
In this system , we employed a newly developed holographic filed concave grating as splitting beams element , as well as multi - channel photodetector - ccd ( charge coupled devices ) as spectrum detection . these all solidified the foundation of measurement ; microcomputer control make the system automatic
采用新型的全息平场凹面光栅作为分光元件，并引入多通道光电探测器件ccd进行光谱信号探测，为光谱反射率的测量准备了物质条件；采用微型计算机控制，达到自动化测量。