UVLEN - Page 1
Forum section: electronics / general

author: PlainName
author_rank: Super Contributor
timestamp: June 16, 2020, 10:19:06 pm
content: Somehow, this $20 device which fits over a smartphone lens, converts the phone LED output to far-UVC and zaps viruses in 5 seconds.https://uvlen.com/QuoteUh-huh. I imagine the amount of UVC spurted out would be mostly harmless.

author: Someone
author_rank: Super Contributor
timestamp: June 17, 2020, 12:01:46 am
content: Biology is an interesting system, sunlight UV both burns humans and inactivates infectious substances. Labs use very intense UV light to disinfect objects or spaces at high intensities with safe human exposure limits of just a few seconds and total cycle time to clean might be hours.For this device, visible to UV conversion technology is available and plausible for that application. There will be particular examples they can show of "easy" targets being disinfected quickly, but it won't be applicable/practical for all surfaces and contaminants.Trying to ensure a reliable dose over any specific area and avoid accumulating too much on skin (or eyes!) is the challenge and probably no better solved than their other bulk emitting products.

author: Raj
author_rank: Frequent Contributor
timestamp: June 17, 2020, 04:07:45 am
content: Quote from: dunkemhigh on June 16, 2020, 10:19:06 pmOfc it wouldn't work butt the fact that it took so long to be 'invented' is surprising. And most of covid fear is unjustified anyway.Where I am, even though there are no covid case in the city, the people are acting scared like hell.

author: AVGresponding
author_rank: Super Contributor
timestamp: June 17, 2020, 05:36:25 am
content: According to the link, it's just a filter, doesn't convert the light at all.

author: Haenk
author_rank: Super Contributor
timestamp: June 17, 2020, 06:41:43 am
content: What a great idea (to get rid of your money)!Not that it will kill anything (continuous usage of the flash LED might wear it out, so it seems it *might* kill something after all) - the amount of UV energy and therefor the range/covered area iis waaaaaay too little to be of any use. There is a reason why you normally use UV lamps with dozens of Watts...Sidenote: If I put a 5G-blocking sticker next to it, will it still be non-working?

author: PlainName
author_rank: Super Contributor
timestamp: June 17, 2020, 08:06:41 am
content: There's an idea! Up-converter for 5G to UVC.

author: HwAoRrDk
author_rank: Super Contributor
timestamp: June 22, 2020, 08:11:04 am
content: If we assume that itdidwork, isn't such a thing stupidly flawed for their example of disinfecting hands?Say your hands are all covered in germs, etc. You pick up your phone (with one of said hands), and turn on UVLEN. You disinfect one hand. But what about the other hand? You swap the phone to your other hand. Oh, wait, you've now got germs on your freshly-disinfected hand from the dirty phone. Better start over. Repeat ad nauseam...Can UVLEN disinfect the phone itself?

author: PlainName
author_rank: Super Contributor
timestamp: June 22, 2020, 08:53:06 am
content: Each time you swap hands the germ count on your phone will be diluted (since some is sticking to your hands), so after a few goes everything will be clean

author: Cyberdragon
author_rank: Super Contributor
timestamp: June 23, 2020, 04:19:19 am
content: Quote from: dunkemhigh on June 22, 2020, 08:53:06 amOr just use alcohol wipes on your phone.

author: AVGresponding
author_rank: Super Contributor
timestamp: June 23, 2020, 04:28:23 pm
content: I visited wikipedia for a quick refresher as it's been three decades since I did any serious physics.I'm calling complete bs on this, as I expected.As we know (I hope we all here know) normal LEDs don't emit light at this frequency. Therefore as this device relies on a normal LED, it must be trying to shift the energy levels of the photons.Fluorescenceis an example of this, but I thought I remembered that photons are emitted at a lower energy level than the light source, and I was correct barring one exception which I'll come to.Since UVC is shorter wavelength, and therefore higher energy level than the source, it can't be that.Now for the exception. There is a special type of energy level shifting calledtwo photon absorption, but this requires lasers to activate, as the conversion rate is some orders of magnitude lower than linear absorption (fluorescence). So, can't be that either.As Big Clive points out in his video, this will just be some blue filter. I hope they go bust, scumbag scammers.

author: Ultrapurple
author_rank: Super Contributor
timestamp: August 06, 2020, 01:00:13 pm
content: Quote from: AVGresponding on June 23, 2020, 04:28:23 pmYeah, they'll go broke. The secret is thatbeforethey go broke they'll put their pet cat on the payroll and funnel all the punters' money out that way as "salary".AFAIK you can't sue a cat. And they're not registered for tax, either.