Tuesday, September 17, 2013

Laser Warning Device



Laser device with warning function are widespread used because of its advantage. There are many scenes like these in the 007 system movies: make a beam of light fill up the monitoring area, when someone enter the area, he will block the light and then the laser alarm device will send out a particular signal which will attract the attention of guardians in order to take appropriate measures.

Compared with the device with visible laser beam, semiconductor laser unit with many advantages which as listed:
It launch the infrared light which is invisible for human eyes.
Launch in pulse type, can be encoded and make the false signal failure.
With high efficiency, can produce high power and that will prolong the useful time and distance.
Good directionality. It is able to reflect by prism. This can make the laser beam as an invisible wall around a certain area, and block the inward or outward.
When the light are kept out, the laser warning device will ring. The experienced user can judge from a variety of different information of the target category.
This kind of device can be applied to the airport, warehouses, and other secret facilities in barracks, to help the guards to work.

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