Hi Ron your text friend Dave from up North another amazing video I miss them you're the best professional I've ever seen in the business hope you're doing well have a good Christmas and may God bless you and keep you safe always😅
I was just doing this, because the high-watts 365nM arrays put out lots of visible white! They also appear to have an IR hump at 730nM, but that might be a spectrometer artifact. Try some glass filter-disks on any 365nM leds. I have some "ZWB2" type, with a 40nM passband at 365nM. They nicely take out the visible whitish glow. I guess the 25mm disk size was designed for UV flashlights, so they're common. But ZWB2 does cut down the UV by more than 15%, and heat up when placed against high-watt UV arrays, so I have some ZWB3 types coming in. With the "white" removed, human eyes can still see the 365nM chip just fine, like a violet dot. They're incredibly bright after all (mine have 3watt drive,) and the human sensitivity curve isn't vertical in the UV. When you look at 270nM LEDs, do they still appear as a purple dot? If so, then I wonder how deep in the UV-C does an LED need to be, before human eyes cannot see it at all.
Great video!!! Good to see you experimenting with UV leds. This is the season for doing that as its colder outside and warmer inside. Happy Holidays to you Ron and your family!
@@project-326 Im aware, i left a comment with this videos link in Toms recent video. I know how resourceful this gal is and since Tom doesnt have the budget to buy the appropriate light source for that reaction maybe Glasslinger could throw him a bone and point him at some obscure piece of arcane technology only a true ebay lurker and serious dumpster diver could find so that tom could actually have a proper shot at the synthesis.
I think he's keen to keep things as "hardware store"/eBay as possible - in the most recent video he mentioned a sensitizer (benzophenone?) would hopefully allow it to work with cheaper & widely available longer wavelength UV LED panels
If you don't have a suitable spectrometer you can be pretty sure it's a UVC LED just by the characteristic gold plated quartz windowed hermetic package necessary at that wavelength.
Does this type of scope need calibrating how would they go about that, with a laser maybe? How does the voltage spike tell you what range those peaks are in nm, or do you have to trust what the label says
I am more interested in a UV light source with a wide wavelength range. It is more useful in uv spectroscopy. It is vacum tube which contine duterum gas.
on amazon they have these 405nm modules for laser pointers and I would love to see the output of one of those .... you can focus it down and it will burn you.... If I had your address I would drop ship one, I am doing experments with 405nm laser, cnc, and 3d printer resin ...
people in the reviews say its dim... its not dim at all they just cant see it and dont need to be messing with things that can hurt your eyes .... I have a co2 laser and its no joke... no blink reflex if you cant see it right ?
Even LEDS, e.g. a single 365nM surface-mount led, the kind with 1.4amp drive, will make paper blacken and smoke, if the paper is held less than 1cm distant. And, those ten-watt UV LED arrays, they'll make your hand feel distinctly warm, even when held many inches away. Also, running one of those unshielded in the lab, you can see every trace of dried human body fluids on the walls. Did someone sneeze on your whiteboard long ago? Ugh, now you know. Get out gloves and a bucket, and do like the Daleks command. Heh, haven't yet damaged my retinas. But then, I haven't had to work with the hundred-watt versions, the one with 10 x 10 led chips, mounted on a "heat pipe" cpu-cooler assembly. Not a laser. Still scary.
![A Small, Cheap Micro-Spectrometer - Review [Pt 1]](http://i.ytimg.com/vi/MOXryggwr_Q/mqdefault.jpg)
how are you my friend we missed you
Thanks ron it always a treat to get a Glasslinger video👍👍👍👍
Neat! Glad to see you back!
Good to see you back in production
Thanks V for the wonderful video. Congratulations from Bulgaria
Hi Ron your text friend Dave from up North another amazing video I miss them you're the best professional I've ever seen in the business hope you're doing well have a good Christmas and may God bless you and keep you safe always😅
Missed you. Happy Holidays 🎄🥳
I was just doing this, because the high-watts 365nM arrays put out lots of visible white! They also appear to have an IR hump at 730nM, but that might be a spectrometer artifact.
Try some glass filter-disks on any 365nM leds. I have some "ZWB2" type, with a 40nM passband at 365nM. They nicely take out the visible whitish glow. I guess the 25mm disk size was designed for UV flashlights, so they're common. But ZWB2 does cut down the UV by more than 15%, and heat up when placed against high-watt UV arrays, so I have some ZWB3 types coming in.
With the "white" removed, human eyes can still see the 365nM chip just fine, like a violet dot. They're incredibly bright after all (mine have 3watt drive,) and the human sensitivity curve isn't vertical in the UV. When you look at 270nM LEDs, do they still appear as a purple dot? If so, then I wonder how deep in the UV-C does an LED need to be, before human eyes cannot see it at all.
Great video!!! Good to see you experimenting with UV leds. This is the season for doing that as its colder outside and warmer inside. Happy Holidays to you Ron and your family!
Nice, a proper old school spectrometer. What kind of diffraction grating and optics is it using?
I don't know. It came out of a spectrophotometer I got on ebay.
@@glasslinger would make for an amazing teardown...
Sort of a cliff hanger episode 🙄
Happy Holidays to you and your family.
Groovy..Best of the Season to You and Yours.
Sending this one over to Tom at Explosions&Fire, maybe he can get that damn UV process down this time.
He needs 395 for the cubane reaction...
@@project-326 Im aware, i left a comment with this videos link in Toms recent video. I know how resourceful this gal is and since Tom doesnt have the budget to buy the appropriate light source for that reaction maybe Glasslinger could throw him a bone and point him at some obscure piece of arcane technology only a true ebay lurker and serious dumpster diver could find so that tom could actually have a proper shot at the synthesis.
I think he's keen to keep things as "hardware store"/eBay as possible - in the most recent video he mentioned a sensitizer (benzophenone?) would hopefully allow it to work with cheaper & widely available longer wavelength UV LED panels
So basically a UVA LED and a UVC LED
Yes. They are physically separated by about 1 to 2 millimeters in the housing.
If you don't have a suitable spectrometer you can be pretty sure it's a UVC LED just by the characteristic gold plated quartz windowed hermetic package necessary at that wavelength.
Does this type of scope need calibrating how would they go about that, with a laser maybe? How does the voltage spike tell you what range those peaks are in nm, or do you have to trust what the label says
Seasons greetings Ron.
I am more interested in a UV light source with a wide wavelength range. It is more useful in uv spectroscopy. It is vacum tube which contine duterum gas.
Gtsy, Thank you 👍🏼
can you measure the frequency as well ?
Wavelength and frequency are measures of the same thing. Just inverse. You can calculate the THz frequency from the nm wavelength.
@kevinjohnston9144
on amazon they have these 405nm modules for laser pointers and I would love to see the output of one of those .... you can focus it down and it will burn you.... If I had your address I would drop ship one, I am doing experments with 405nm laser, cnc, and 3d printer resin ...
people in the reviews say its dim... its not dim at all they just cant see it and dont need to be messing with things that can hurt your eyes .... I have a co2 laser and its no joke... no blink reflex if you cant see it right ?
Even LEDS, e.g. a single 365nM surface-mount led, the kind with 1.4amp drive, will make paper blacken and smoke, if the paper is held less than 1cm distant. And, those ten-watt UV LED arrays, they'll make your hand feel distinctly warm, even when held many inches away. Also, running one of those unshielded in the lab, you can see every trace of dried human body fluids on the walls. Did someone sneeze on your whiteboard long ago? Ugh, now you know. Get out gloves and a bucket, and do like the Daleks command.
Heh, haven't yet damaged my retinas. But then, I haven't had to work with the hundred-watt versions, the one with 10 x 10 led chips, mounted on a "heat pipe" cpu-cooler assembly. Not a laser. Still scary.