Infrared, UV, and Visible Emitters are three optoelectronic devices that operate in different wavelength ranges and play a key role in a wide range of applications. Infrared emitter is a device that emits infrared light in a certain range through an infrared emission tube, and has the function of remote control. It is controlled by a single chip computer to produce a certain regular wave signal, and drives the infrared transmitting tube to produce infrared signal. UV(ultraviolet) emitters produce ultraviolet light, which has a wavelength range of roughly 100nm to 400nm and is divided into three subcategories: UVA, UVB, and UVC. Ultraviolet light is also outside the visible spectrum and has a higher energy. Visible light emitters produce light in the wavelength range of about 400nm to 700nm, which is the spectral range that the human eye can perceive. The most common visible light emitters are leds (light-emitting diodes).

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