Glossary
- Isotropic light source: light source emitting with a constant intensity whichever the direction
- Intensity ( radiometry ): power emitted by a light source per unit of solid angle ; same term used in photometry
- Photodetector: device sensitive to light and converting the absorbed photons into a signal, in most cases into an electrical signal
- Sensitivity: for a photodector, ratio between the photocurrent and the incident optical power
- Photocurrent: in a photodetector, current generated by the detected light