Reader communicating without physical contacts.

Hardware reading magnetic card stripes.

Hardware optically reading barcodes.

Hardware reading QR codes.

Hardware capturing fingerprint patterns.

Hardware imaging the eye iris.

Compact hardware containing an image sensor and optics.

Semiconductor sensor converting light into electrical data.

Image sensor using CMOS technology.

Image sensor using charge-coupled-device technology.

Optical element focusing light onto an image sensor.

Mechanical interface holding a camera lens.

Hardware adjusting camera lens position.

Motor moving a lens for focusing.

Actuator moving optical elements for stabilization.

Hardware controlling exposure duration.

Adjustable opening controlling incoming light.

Filter blocking infrared light in cameras.

Optical element selectively passing wavelengths.

Optical component redirecting or splitting light.

Reflective optical component.

Optical component dividing a light beam.

Optical component spreading light.

Sensor measuring ambient or incident light.

Sensor measuring surrounding illumination.

Sensor detecting nearby objects.

Sensor measuring distance or scene depth.

Sensor determining distance from travel time.

Depth sensor projecting patterned light.

Camera system using two viewpoints for depth.

Camera detecting infrared thermal radiation.

Multiple sensors measuring thermal radiation.

Passive infrared motion sensor.

Sensor using microwave signals for detection.

Hardware using radio waves for detection or ranging.

Antenna used by radar hardware.

Hardware transmitting and receiving radar signals.