Sensor measuring ambient or incident light.
Sensor measuring ambient or incident light.
Optical component spreading light.
Optical component dividing a light beam.
Optical component redirecting or splitting light.
Optical element selectively passing wavelengths.
Filter blocking infrared light in cameras.
Adjustable opening controlling incoming light.
Hardware controlling exposure duration.
Actuator moving optical elements for stabilization.
Everything is a system, and every system contains systerms.