Optical Sensors are sensors that detect and measure light-related signals by converting optical energy into electrical outputs. They are used to sense changes in light intensity, presence or interruption of a light path, and other optical conditions.

Within the broader Sensors category, optical sensors commonly integrate light-sensitive elements and may also include associated signal-conditioning functions to support stable detection and interpretation of optical inputs.

• Core function: Convert incident light or optical variations into electrical signals.
• Detection scope: Respond to visible, infrared, or ultraviolet light depending on the sensing principle.
• Common forms: Discrete light-detecting devices and integrated optical sensing modules.