Hand Held

 NZIR now have black lights for hire, these are perfect for;

• Finding hydrocarbon contamination on abrasive blast cleaned steel.
• Finding leaks from fluorescing dyes.
• Activation of fluorescing inks and dyes used as anti-counterfeitiing measures of theft set up's.
• Examining artwork and glassware for hidden repairs.
• Scanning crime scenes for foreign materials.
• Locating staining of linen.
• Numerous other uses to long to list.
  
  See How UV Light Works video on You Tube: https://www.youtube.com/watch?v=ps80qZbbdbM

Specification

·      Longwave UV LED, 380-385 nM

·      Bulb Life approximately 100,00 hours

·      3 AAA Batteries

·      Weight 2 oz

·      Length 3.8 inches

 

In this article, we'll find out exactly what's going on here. We'll also see why black lights make some objects glow but not others, and we'll look at some interesting black light applications.

What Is "Black Light"?
If you turn on a black light bulb in a dark room, what you can see from the bulb is a purplish glow. What you cannot see is the ultraviolet light that the bulb is also producing.

Ultraviolet light that the bulb is also producing.

Our eyes can see visible light in a spectrum ranging from red through orange, yellow, green, blue and violet. Above violet is ultraviolet light, which we cannot see. How Sunburns and Sun Tans Work discusses ultraviolet light and its effects on our skin. A black light bulb produces UVA light (as opposed to UVB light, which is much more harmful).

What you see glowing under a black light, whether on a fluorescent poster or an invisible hand stamp or a newly washed white T-shirt, are phosphors.

A phosphor is any substance that emits visible light in response to some sort of radiation. A phosphor converts the energy in the UV radiation from a black light into visible light.

In the next section, we'll see how phosphors are used in regular fluorescent lighting and in black lights.