Why is UV Flaw Detection Light called Black Light?

What is ultraviolet light?

The total wavelength of ultraviolet light is between 100 and 400 nanometers. Ultraviolet light is invisible light and cannot be identified.

The peak wavelength of the LED black light used for flaw detection is 360nm ~ 370nm. Ultraviolet UV-A, if not properly filtered, can produce unwanted visible light and harmful ultraviolet radiation. Visible light pollution above 400 nanometers can interfere with the inspection process and must be controlled to minimize reflected glare. UV-B and UV-C pollution must also be eliminated to prevent exposure to harmful radiation.

Why is UV flaw detection light called black light?

The ultraviolet flaw detection lamp uses a filter to filter out the visible light, and the output is long-wave ultraviolet light. Long-wave ultraviolet rays are not within the range of human eyes, so the ultraviolet lamp used for flaw detection is usually called black light lamp.

The ultraviolet flaw detection lamp used in fluorescent magnetic particle inspection and fluorescent penetrate inspection is a non-destructive testing method. It is mainly used for metal surface inspection to detect cracks and defects on the material surface. Common styles of ultraviolet flaw detection lamps include flashlight and portable.

What issues should we pay attention to when using UV flaw detection lamps?

1. When using UV detection lights, avoid direct exposure to eyes and skin to prevent eye and skin damage.

2. When using UV lamps, indoor air circulation should be ensured and protection should be taken. At the same time, avoid prolonged exposure to ultraviolet rays to avoid harm to your health.

3. Flaw detection lights and accessories should be used or stored in a clean, dry, and non-corrosive environment.

4. If there is dirt on the filter, it should be removed in time because it will affect the emission of black light.

5. If the filter has cracks, it should be replaced in time, because cracks will allow visible light and medium and short-wave ultraviolet light to pass.

6. During the use of the UV lamp, if you find that the lamp does not light up or flickers, you should stop using it immediately and check whether the flaw detection lamp has poor contact or whether the lithium battery is insufficiently charged.