The infrared emission tube is composed of an infrared light-emitting diode moment, and a PN junction is made of a material with high infrared radiation efficiency (commonly used as gallium arsenide), and a forward bias is injected into the PN junction to inject infrared light, and the spectral power distribution thereof is distributed. The center wavelength is 830 to 950 nm. LED is the abbreviation of English Light Emitting Diode. The performance is positive temperature coefficient. The higher the current is, the higher the temperature is. The higher the temperature is, the higher the current is. The power of LED infrared light is related to the current, but when the forward current exceeds the maximum rated value, the infrared light The transmission power is instead reduced.
The manufacturers of wafers in infrared emission tubes mainly include: Taiwan has Guanglei (ED), Dingyuan (Tyntek), foreign countries have Korean, Japanese Dova wafers, and domestic Shenzhen Orende, etc.
Infrared emission tube (infrared tube) can be widely used in infrared reference products such as infrared camera and audio output. The power of the chip inside usually determines the emission distance, but the effect of the infrared surveillance camera is also the angle of the infrared lamp. Board, lens, etc. Infrared camera design is closer to the angle of the IR emitter tube, and also with the lens angle of view; 20 meters or more must use Taiwan's positive type 12mil wafers, Japan's also. Due to the disorderly competition in the market, the concept of illumination distance and actual visual distance advertised by manufacturers is unclear. Most small infrared camera manufacturers use domestic and Taiwanese 10mil, 8mil wafers and even bulk wafer packages in order to reduce production costs. Including the defective IR tube of the packaging factory) to make a positive infrared lamp to assemble the camera. It is recommended that long-distance users still use IR-emitting tubes encapsulated in positive-type chips, such as Taiwan Dingyuan, Guanglei (Dingyuan relatively slow decay, clear night vision).
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