绕射光栅 meaning in English

diffraction gratings

And when observers take a spectrum of the galaxy , the diffraction grating of the spectrograph disperses the light over a large area on the detector , rendering the signal even fainter at each wavelength
而当观测者撷取星系光谱时，光谱仪的绕射光栅会把光分散到侦测器上一个很大的?围，导致每个波长上的讯号更加微弱。
The patent covers the use of a computer - designed diffraction grating , a type of hologram that takes a single beam and breaks it up into an array of beams , each one of which forms an optical trap for particles of micron or nanometer dimensions
此专利涵盖了电脑设计的绕射光栅，以及可将单一光束分散成阵列光束的雷射全像术，其中每道光束都会形成光阱，可捕捉微米或奈米大小的粒子。