Table 1.

Specifications of LED arrays working at different optical wavelengths.

Wavelength (nm)	850	690	620	470
Material	AlGaAs	AlGaInP	AlGaInP	InGaN
Maximal energy output (µJ)	200	80	50	60
Rising time (ns)	21	18	23	18
Falling time * except lag (ns)	36	30	39	33
Wavelength FWHM (nm)	35	21	16	20
Settable pulse width (ns)	35–150