Table 1 Specifications of LED arrays working at different optical wavelengths.
From: Light Emitting Diodes based Photoacoustic Imaging and Potential Clinical Applications
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 | |||
