An optical sensor generally refers to a device that senses the energy of light from ultraviolet light to infrared light and converts the light energy into an electrical signal. The optical sensor is a sensing device, which is mainly composed of photosensitive elements, divided into four types: ambient light sensor, infrared light sensor, solar light sensor and ultraviolet light sensor. It has been widely used in the measurement of electrical quantity and non-electric quantity because of its high precision and real-time processing by microcomputer connection.
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