Make a disinfecting flashlight ?

[RedCowboy]

I expect uv-c safety glasses should be worn when using this diode in a disinfecting flashlight, or is this even reasonably possible ?

Ultraviolet (UV-C) 280nm Nichia NCSU334A LED Module

 

[Gryphon]

Thats a terrifying LED, I bet it could charge glow in the dark stuff very well

 

[RedCowboy]

Check out this hospital robot that runs around blasting all the little germs, it must shut down if it detects people ???

RAY 4 (RE)

www.aerohygenx.com

 

[WizardG]

Thats a terrifying LED, I bet it could charge glow in the dark stuff very well

Not as well as you might think. Every type of phosphorescent material has a wavelength it absorbs best. A few years back I coated a scrim drop with a mixture of phosphors: red, green, and blue. The red would respond strongly to a green laser, but green light wouldn't excite the other phosphors. A 445 blue would excite the green phosphor very strongly, the red very weakly, and the blue phosphor not at all. A 405 laser would excite the blue phosphor the most with weaker response from the green and no response noticeable from the red. It was a pretty cool effect spoiled a bit by the overwhelming rotten egg odor from the red phosphor if you took the scrim into any type of confined space.

 

[kecked]

It’s less the power and more the delivered dose. You can google it but the required dose is not trivial for sterilization. Will this deduce the load Ie disinfect? Yes but to what log value. It will also destroy plastics and make a lot of varnish sticky and yellow. It can also cause skin cancer and cataracts. Serious stuff but a good tool if managed. We used something similar on laptops during Covid. Honestly a soap and water wash is most effective.

also 260nm is preferred. 280 is on the higher side but still on the curve. 77mw over what areas? That’s meaningless.

 

[RedCowboy]

The LED should be edge emitting, the viewing angle is 120 degrees where as a XM-L2 that we all have likely all used in flashlights is 125 degrees, so it's a typical LED flashlight angle of emission to be used with a steep conical reflector for edge emitters.

Here's another uv-c @ 275nm and it's viewing angle is also 125 degrees.

Ultraviolet UV-C 275nm Seoul Viosys LED Module

www.ledsupply.com