Optical communications are used in the railroads that support the daily transportation infrastructure.
In industrial system environments where the effects of noise from outside the transmission path are significant, communication components using fiber optics, which are not susceptible to noise, are employed instead of communication using electrical signals.

CMOS image sensors are used in surveillance cameras that protect railroad operations and passenger safety. A CMOS image sensor is an imaging device that converts images captured by a lens into electrical signals. The captured video is used for real-time surveillance, video storage and analysis, and helps ensure safety on a daily basis.