流式细胞仪的原理在于让细胞穿过激光检测设备，从而使科学家们得以对细胞进行计数和检测。
Flow cytometry allows scientists to count and examine cells by passing them through a laser-based detection device.
现状：利用激光检测内管壁的新型设备将在2011年左右投产。
Status: New models that use a laser to measure inside pipes could be ready by 2011.
激光直写机是制作衍射光学元件的关键设备，离焦检测技术是其中的重要单元技术之一。
Laser direct writing system is the key equipment for fabrication of optical diffractive elements, and the defocus detection technique is the important sub-tech in it.
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