What determines the brightness (visibility) of a laser source?
A18: Mainly two parameters determine brightness of a laser source. Output power and laser’s wavelength. In the visible range (300-700nM), the higher the output power the more visible the laser. In terms of wavelength, the closer to 500nm, the more visible since human eye sensitivity is at its peak for this wavelength. Q19. What is the advantage of using green laser over red laser? A19: Since output power is restrict under control, for many applications that have human contacts, green laser with sufficient low output power can be used without sacrificing visibility. Q20. I order a 5mW laser source with a line projector. Why does my power meter measures much lower output power? A20: The 5 mW laser output is the overall output power. When the laser is projected in a line or other shapes, the total power is spread over the entire output. Typically output power is measured via a 7mm aperture. Therefore only small portion of the overall output power is measured. Q21. Is the output power of t
