问题
问答题 简答题
使用光纤传输的激光测量系统有哪些优点？存在什么问题？
答案
参考答案：
优点：激光头可以随意放置、没有传输激光的固定封闭管路，给使用者带来极大方便。
存在问题：相互垂直的两个线偏振激光f1和f2，经过光纤传输后出来时，这两个线偏振激光f1和f2的偏振面已经不是相互垂直，因此不能用偏振分光镜加以分享，故双频激光不能用光纤传输。
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使用光纤传输的激光测量系统有哪些优点？存在什么问题？
参考答案：
优点：激光头可以随意放置、没有传输激光的固定封闭管路，给使用者带来极大方便。
存在问题：相互垂直的两个线偏振激光f1和f2，经过光纤传输后出来时，这两个线偏振激光f1和f2的偏振面已经不是相互垂直，因此不能用偏振分光镜加以分享，故双频激光不能用光纤传输。
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| Now we live in the "computer age". People like scientists, teachers, writers and even students use computers to do much 1 . But more than 30 years ago, 2 couldn't do much. They were very big and expensive. Quite few people were 3 in them and knew how to use them. Today computers are 4 and cheaper. So many people like to use them 5 they can do a lot of work. Some even use them at home. Computers become very important because they can work 6 than men and make fewer mistakes. Computers can help people 7 a lot of work. Writers use computers to write, students use them to study and children use them to play games. Computers can 8 what you put into them. They are very useful and 9 . They are our good 10 . We love them very much. | |||
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