| UV | Ultraviolet |
| APDs | Avalanche photodiodes |
| GaN | Gallium nitride |
| CMOS | Complementary metal-oxide-semiconductor |
| SNR | Signal-to-noise ratio |
| TIA | Transimpedance amplifier |
| RTIA | Resistive transimpedance amplifier |
| CTIA | Capacitive transimpedance amplifier |
| HV | High voltage |
| CVF | Charge-to-voltage conversion factor |
| ADC | Analog-to-digital converter |
| CDS | correlated double sampling |
| IC | Integrated circuit |