We analyzed the stray light source of system and drew a conclusion that non-image beam has great effect on system qualities and system ghost images caused by parallel Windows should not be ignored.
分析了系统杂散光的来源，得出非成像光束对系统影响较大、平板玻璃窗产生的鬼像不容忽视的结论。
Starting from Grand Uncle belief of Hakkas society, the author looks into its position in traditional belief system of heavenly god, earthly god and ghost.
从客家社会伯公与大伯公信仰谈起，追究其在传统天神、地?与人鬼的信仰体系中的定位问题。
Stray light generated in optical system forms a lot of ghost images, which not only seriously influence the beam quality and propagation properties, but also damage optical components.
光学系统的杂散光极易在系统内形成多个鬼像，这不仅严重影响光束质量和传输特性，并可能对系统光学元件造成永久性损伤。
Ghost image has a great influence on photoelectric imaging system, as it may influence the system sensitivity and cause false signal.
在光电成像系统中，二次成像对正常图像影响较大，轻者降低系统灵敏度，重者产生虚假信号，影响观察。
Ancestor worship, in essence, was also a kind of worship of ghost and had its own strict system of sacrifice.
祖先崇拜，就其本质来说也是鬼魂崇拜，并且有一套严格的祭祀制度。
Stray light generated in optical system forms a lot of ghost images, which seriously influence the beam quality and propagation properties.
光学系统的杂散光极易在系统内形成多个鬼像，严重影响光束质量和传输特性。
Stray light generated in optical system forms a lot of ghost images, which seriously influence the beam quality and propagation properties.
光学系统的杂散光极易在系统内形成多个鬼像，严重影响光束质量和传输特性。
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