green laser(綠雷射)的功率

1mW : no need to buy since 1mW is don't have brightness
5mW : indicator of short-distance
10mW : star indicator in dark night
>50mW : burning stuff,well indication of star in night with light
>100mW-500mW : as more power to indicating or burning
>600mW : melting many things or for indicating star for long long distance

1800mW = 1.8W(not for industrial),some laser modual have 10W,its for industrial


我手上枝 green laser (足電) 20cm 3秒點到火柴

大約幾mW?

difficult to tell you,because I want to know that whether 20cm is focus point.
火柴-what is the color of the matches,if it can burning stuff,you can suppose the laser have the power more than 50mW.

you can use Laser Power Meter to check the Wattage to avoid rask and save your cabbage.


2010-01-27 23:18:33 補充：
250mW開始 大都跟鎖匙
not yet,it depend on the brank,such as Hulk,Warn Laser....those have the safety key if its more than 250mW.Or infrared Laser with 808nm and 980nm