紅外線--綠雷射--CD電眼 (20點)

1) Laser is a parallel steam which carry high power(energy) as indicated by mW(200mW>10mW...)

the parallel beam was focus via the convex lens inside the laser pointer.
it can add more power(more energy)to the laser beam


2) use a DVD burning to connect with power and remember to choise a nice housing.


3) difference DVD burner have difference laser diode,,difference laser diode have difference wavelength(color)..


效果只係似紅外線..may be your laser diode is 808nm(Infrared)..try out.