optical focus size

基本解释

Spot size detection method is representative method to obtain a focus error digital optical disk storage system.
光斑尺寸法是数字光盘信息存储中的典型聚焦误差探测方法。
Design of optical systems of long focal length, wide field and minimized size has long been the focus of discussion.
大视场、长焦距、小体积是空间光学系统设计研究的热点。
In addition, it can also help shorten optical instruments' focus, decrease satellite camera's size and mass while remaining the same spatial resolution of satellite images.
这一研究成果的实际应用，将会提高卫星的空间分辨率，也可以在保持卫星分辨率的条件下，缩小光学仪器的焦距，使卫星相机小型化，减小其体积和重量。
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