Is metering fiber required to emit light from the light source? Can I get a light emitting diode in general?
Metering fiber does not necessarily require light source to emit light, general light-emitting diode is ok.
You can also use the red pen to test, that is, red emitting LED light source, luminous intensity, a few hundred dollars.I'm afraid I can't get an ordinary light emitting diode, mainly because the light is too weak.
Not necessarily, in addition to the device's semiconductor laser light source, you can also use the supporting light source with the power of light.Handheld light source is actually LED light source, according to domestic and imported different from more than 2000 to more than 10000, adjustable several wavelengths.
