紫外线发生在可见光谱和X射线光谱之间。紫外线波长范围指定为100 nm至400 nm，尽管您可能会发现长波侧的定义超过此范围。虽然人眼看不到大部分紫外线输出，但在与可见光相邻的波长下可以看到紫色眩光。LED紫外线灯可以分为3个一般区域。这些紫外线灯被分类为UV-A灯，UV-B灯和UV-C灯。
紫外线 A （UV-A）灯: 400 – 315 nm LED灯传统上用于无损检测（NDT），防伪检测或验证（货币，驾驶执照，文件），取证（犯罪现场调查），紫外线固化（油墨，粘合剂），艺术品修复等应用。
专门用于无损检测（NDT）的UV-A紫外线探伤灯，所有荧光渗透剂和磁粉探伤材料在UV-A下在365nm处发出荧光。这就是渗透剂和荧光磁粉的配方在365nm紫外线灯波长下反应（荧光）的方式。在取证中，在UV-A下，单独或通过添加专用粉末来检测和检查许多痕迹。瑞典兰宝Labino UV-A紫外线灯 产品组合包括GX UV-A 吊挂式探伤灯, BB2.0系列手持式UV-A紫外线灯, MB2.0系列手持式UV-A紫外线灯, UVG3 2.0紫外线手电筒（UV-A FLASHLIGHT）和UVG5 紫外线头灯（UV-A HEADLIGHT）。
紫外线B（UV-B）灯：315 – 280 nm是紫外光谱中zui不受赞赏的波长，尽管并非完全被忽视。紫外线固化，生物医学和DNA分析对UV-B有一定的用途。
紫外线C（UV-C）灯：280 - 100 nm：
由于COVID-19，短波紫外线灯（UV-C）280 - 100 nm可能是容易被大家熟知的紫外线灯。短波紫外线灯主要用于消毒以及空气和水净化系统。
How the Ultraviolet (UV) Spectrum is used in nondestructive testing (NDT)
Ultraviolet light occurs between the visible and x-ray spectrums. The Ultraviolet wavelength range is specified as 100 nm to 400 nm although you may find definitions exceeding this on the long wave side. Although much of the output of UV light is not visible to the human eye, a violet glare is visible in wavelengths neighboring visible light. UV light for LEDs can be broken down into 3 general areas. These are classified as UV-A, UV-B and UV-C.
Ultraviolet A (UV-A) 400 – 315 nm LED lights have been traditionally used in applications such as NONDESTRUCTIVE TESTING (NDT), counterfeit detection or validation (Currency, Driver’s license, Documents), FORENSICS (Crime scene investigations), UV CURING (inks, adhesives), ART RESTORATION, to name a few.
Specifically for NONDESTRUCTIVE TESTING (NDT), all fluorescent penetrants and magnetic particle materials fluoresce under UV-A, at 365 nm. This is how the formulations for penetrants and magnetic particle materials were designed to react (fluoresce), at 365 nm wavelength. In Forensics, a number of traces are detected and examined under UV-A, individually, or by adding specialized powders. Labino UV-A portfolio of products consists of GX ORION STATIONERY UV-A, BB 2.0 SERIES HANDHELD UV-A, MB 3.0 SERIES HANDHELD UV-A, UVG3 2.0 UV-A FLASHLIGHT and UVG5 UV-A HEADLIGHT.
Ultraviolet B (UV-B) 315 – 280 nm is the least appreciated wavelength within the UV spectrum albeit not entirely neglected. UV curing, biomedical and DNA analysis have some use for UV-B.
Ultraviolet C (UV-C) 280 – 100 nm lights are perhaps the most recognizable ones these days due to COVID-19. They find usage in disinfection as well as air and water purification systems.
There are safety concerns with all categories of UV, although the UV-C is the most harmful, not just to micro-organisms such as bacteria, but also humans. UV in general can cause damage to the eyes and be the cause of skin cancer. Take all precautions and PROTECT YOURSELF AGAINST UV EXPOSURE.