Old 04-04-2017, 04:55 AM #1
Crazlaser's Avatar
Class 2M Laser
 
Join Date: Oct 2016
Location: Maryland, USA
Posts: 789
Rep Power: 4179
Crazlaser has a reputation beyond reputeCrazlaser has a reputation beyond reputeCrazlaser has a reputation beyond reputeCrazlaser has a reputation beyond reputeCrazlaser has a reputation beyond reputeCrazlaser has a reputation beyond reputeCrazlaser has a reputation beyond reputeCrazlaser has a reputation beyond reputeCrazlaser has a reputation beyond reputeCrazlaser has a reputation beyond reputeCrazlaser has a reputation beyond repute
Crazlaser Crazlaser is online now
Class 2M Laser
Crazlaser's Avatar
 
Join Date: Oct 2016
Location: Maryland, USA
Posts: 789
Rep Power: 4179
Crazlaser has a reputation beyond reputeCrazlaser has a reputation beyond reputeCrazlaser has a reputation beyond reputeCrazlaser has a reputation beyond reputeCrazlaser has a reputation beyond reputeCrazlaser has a reputation beyond reputeCrazlaser has a reputation beyond reputeCrazlaser has a reputation beyond reputeCrazlaser has a reputation beyond reputeCrazlaser has a reputation beyond reputeCrazlaser has a reputation beyond repute
Default am I actually seeing IR light?

So I was bored today and started playing with my 800mw 980nm laser. I noticed in darkness I can see a dark grayish blue dot on the wall at close range if I move the laser slowly. Other than this the laser is not visible. Am I actually seeing the 980nm light? I have been lead to believe only 808nm is possibly visible and 980nm is far to long of a wl to see at all. But after seeing the dot I'm thinking that at these powers, 980nm might be slightly visible after all. It was really dim, by really dim I mean barely visible at all, your eyes have to adjust to the darkness and be really close to the dot.


__________________
Welcome

My lasers
Sanwu 405nm 250mw Sanwu Pocket Series
445nm 1+ watt china generic laser (broken host)
445nm 2.9 watt Sanwu Silver Series
450nm 3mw LP450-1B
532nm 50mw laserbtb
532nm 301
532nm 70mw Pman
532nm 92mw Pman
635nm 800mw Sanwu Challenger multimode
Laserbtb 980nm 800mw
Eagle Pair goggles 190-540nm & 800-2000nm OD4
Crazlaser's Collection
Crazlaser is online now   Reply With Quote










Old 04-04-2017, 05:34 AM #2
Radim's Avatar
Class 2M Laser
 
Join Date: Aug 2016
Location: European Union
Posts: 656
Rep Power: 7421
Radim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond repute
Radim Radim is online now
Class 2M Laser
Radim's Avatar
 
Join Date: Aug 2016
Location: European Union
Posts: 656
Rep Power: 7421
Radim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond repute
Default Re: am I actually seeing IR light?

Hi Sean, good to see you here again. It was discussed in some thread recently. There was mentioned in one post that even 1064 nm might be visible for some people. I did not read the study linked yet. But gray-blue look... Hmm...
__________________
"Lasers are s3xy."
"That feeling when you see colours as their wavelengths."
"Laserpainting is a drug. Do not try it."


Current collection:
405 nm | 500 mW | Wicked Lasers Lunar
445 nm | 3.5 W | Wicked Lasers Arctic
473 nm | 100 mW | Jet Lasers PL-E Pro (Review)
520 nm | 1 W | Wicked Lasers Krypton
532 nm | 100 mW | Wicked Lasers Evo
532 nm | 800 mW | Sky Lasers PL

589 nm | 50 mW | Dragon Lasers Spartan
635 nm | 750 mW | Wicked Lasers Inferno
1 W RGB projector
(+ some laser pointers)

Laserpainting artworks:
LPF thread: Radim's laser painting
Latest laserpainting: The Portal
Instagram: @radimmatera

Please use hashtag #laserpointerforums for laser related stuff when you post on social media to help us promote LPF. Thank you.
Radim is online now   Reply With Quote
Old 04-04-2017, 05:37 AM #3
Crazlaser's Avatar
Class 2M Laser
 
Join Date: Oct 2016
Location: Maryland, USA
Posts: 789
Rep Power: 4179
Crazlaser has a reputation beyond reputeCrazlaser has a reputation beyond reputeCrazlaser has a reputation beyond reputeCrazlaser has a reputation beyond reputeCrazlaser has a reputation beyond reputeCrazlaser has a reputation beyond reputeCrazlaser has a reputation beyond reputeCrazlaser has a reputation beyond reputeCrazlaser has a reputation beyond reputeCrazlaser has a reputation beyond reputeCrazlaser has a reputation beyond repute
Crazlaser Crazlaser is online now
Class 2M Laser
Crazlaser's Avatar
 
Join Date: Oct 2016
Location: Maryland, USA
Posts: 789
Rep Power: 4179
Crazlaser has a reputation beyond reputeCrazlaser has a reputation beyond reputeCrazlaser has a reputation beyond reputeCrazlaser has a reputation beyond reputeCrazlaser has a reputation beyond reputeCrazlaser has a reputation beyond reputeCrazlaser has a reputation beyond reputeCrazlaser has a reputation beyond reputeCrazlaser has a reputation beyond reputeCrazlaser has a reputation beyond reputeCrazlaser has a reputation beyond repute
Default Re: am I actually seeing IR light?

Quote:
Originally Posted by Radim View Post
Hi Sean, good to see you here again. It was discussed in some thread recently. There was mentioned in one post that even 1064 nm might be visible for some people. I did not read the study linked yet. But gray-blue look... Hmm...
Been quite busy with school lately.

Oh, do you have a link by any chance?
__________________
Welcome

My lasers
Sanwu 405nm 250mw Sanwu Pocket Series
445nm 1+ watt china generic laser (broken host)
445nm 2.9 watt Sanwu Silver Series
450nm 3mw LP450-1B
532nm 50mw laserbtb
532nm 301
532nm 70mw Pman
532nm 92mw Pman
635nm 800mw Sanwu Challenger multimode
Laserbtb 980nm 800mw
Eagle Pair goggles 190-540nm & 800-2000nm OD4
Crazlaser's Collection
Crazlaser is online now   Reply With Quote
Old 04-04-2017, 06:01 AM #4
Radim's Avatar
Class 2M Laser
 
Join Date: Aug 2016
Location: European Union
Posts: 656
Rep Power: 7421
Radim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond repute
Radim Radim is online now
Class 2M Laser
Radim's Avatar
 
Join Date: Aug 2016
Location: European Union
Posts: 656
Rep Power: 7421
Radim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond repute
Default Re: am I actually seeing IR light?

Sure - here: Visiblity help!

I was just about to get in a car to get to work, so no time to search for it.
__________________
"Lasers are s3xy."
"That feeling when you see colours as their wavelengths."
"Laserpainting is a drug. Do not try it."


Current collection:
405 nm | 500 mW | Wicked Lasers Lunar
445 nm | 3.5 W | Wicked Lasers Arctic
473 nm | 100 mW | Jet Lasers PL-E Pro (Review)
520 nm | 1 W | Wicked Lasers Krypton
532 nm | 100 mW | Wicked Lasers Evo
532 nm | 800 mW | Sky Lasers PL

589 nm | 50 mW | Dragon Lasers Spartan
635 nm | 750 mW | Wicked Lasers Inferno
1 W RGB projector
(+ some laser pointers)

Laserpainting artworks:
LPF thread: Radim's laser painting
Latest laserpainting: The Portal
Instagram: @radimmatera

Please use hashtag #laserpointerforums for laser related stuff when you post on social media to help us promote LPF. Thank you.
Radim is online now   Reply With Quote
Old 04-04-2017, 06:40 AM #5
CurtisOliver's Avatar
Class 3R Laser
 
Join Date: Jun 2015
Location: Brentwood, England (Near London)
Posts: 2,493
Rep Power: 12291
CurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond repute
CurtisOliver CurtisOliver is online now
Class 3R Laser
CurtisOliver's Avatar
 
Join Date: Jun 2015
Location: Brentwood, England (Near London)
Posts: 2,493
Rep Power: 12291
CurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond repute
Default Re: am I actually seeing IR light?

Interesting, people usually see IR as red still. But I have noticed an optical effect myself once, but not with IR. If light becomes so dim that you can only just about perceive it, you lose the colour and just get a grey faint light. I'm also wondering whether or not it could be something to do with IR fluorescence. I admit I'm a little bit puzzled by your findings but these are my thoughts.
__________________
View my laser collection



Please make a post in our Member Collections Section. Where you can share your laser collection in one place for all of the forum to see.

Useful Links:
http://darekk.com/kalkulator/wavelength-to-rgb


Feel free to use this +rep icon.
Just right click and open image in new tab,
and then copy and paste the link into those IMG tags.
CurtisOliver is online now   Reply With Quote
Old 04-04-2017, 06:47 AM #6
Radim's Avatar
Class 2M Laser
 
Join Date: Aug 2016
Location: European Union
Posts: 656
Rep Power: 7421
Radim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond repute
Radim Radim is online now
Class 2M Laser
Radim's Avatar
 
Join Date: Aug 2016
Location: European Union
Posts: 656
Rep Power: 7421
Radim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond repute
Default Re: am I actually seeing IR light?

I would expect the fluorescence to be even more red. Just look on my "rainbow" laser in that another thread. There is just original 405 nm, some gap and wavelengths below. However some other effect might be there... Maybe it is just because of brain adjustment. As it cannot assign right color to it? There are many interesting things - what I've noticed with 405 nm for example. It just creates not only a bit blurry dot, but kind of other circle of dots around as I (and not only me) perceive it. These wavelengths in tails seems the most interesting to me due to various special characteristics.
__________________
"Lasers are s3xy."
"That feeling when you see colours as their wavelengths."
"Laserpainting is a drug. Do not try it."


Current collection:
405 nm | 500 mW | Wicked Lasers Lunar
445 nm | 3.5 W | Wicked Lasers Arctic
473 nm | 100 mW | Jet Lasers PL-E Pro (Review)
520 nm | 1 W | Wicked Lasers Krypton
532 nm | 100 mW | Wicked Lasers Evo
532 nm | 800 mW | Sky Lasers PL

589 nm | 50 mW | Dragon Lasers Spartan
635 nm | 750 mW | Wicked Lasers Inferno
1 W RGB projector
(+ some laser pointers)

Laserpainting artworks:
LPF thread: Radim's laser painting
Latest laserpainting: The Portal
Instagram: @radimmatera

Please use hashtag #laserpointerforums for laser related stuff when you post on social media to help us promote LPF. Thank you.

Last edited by Radim; 04-04-2017 at 07:27 AM.
Radim is online now   Reply With Quote
Old 04-04-2017, 08:37 AM #7
CurtisOliver's Avatar
Class 3R Laser
 
Join Date: Jun 2015
Location: Brentwood, England (Near London)
Posts: 2,493
Rep Power: 12291
CurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond repute
CurtisOliver CurtisOliver is online now
Class 3R Laser
CurtisOliver's Avatar
 
Join Date: Jun 2015
Location: Brentwood, England (Near London)
Posts: 2,493
Rep Power: 12291
CurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond repute
Default Re: am I actually seeing IR light?

I couldn't remember the process that I was thinking of. I have just found it however. Double-excitation, where it is possible for the sum of two longer wavelengths to fluoresce and output a shorter wavelength.
__________________
View my laser collection



Please make a post in our Member Collections Section. Where you can share your laser collection in one place for all of the forum to see.

Useful Links:
http://darekk.com/kalkulator/wavelength-to-rgb


Feel free to use this +rep icon.
Just right click and open image in new tab,
and then copy and paste the link into those IMG tags.

Last edited by CurtisOliver; 04-04-2017 at 08:37 AM.
CurtisOliver is online now   Reply With Quote
Old 04-04-2017, 08:42 AM #8
Radim's Avatar
Class 2M Laser
 
Join Date: Aug 2016
Location: European Union
Posts: 656
Rep Power: 7421
Radim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond repute
Radim Radim is online now
Class 2M Laser
Radim's Avatar
 
Join Date: Aug 2016
Location: European Union
Posts: 656
Rep Power: 7421
Radim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond repute
Default Re: am I actually seeing IR light?

Quote:
Originally Posted by CurtisOliver View Post
I couldn't remember the process that I was thinking of. I have just found it however. Double-excitation, where it is possible for the sum of two longer wavelengths to fluoresce and output a shorter wavelength.
Yes, basically this happens in frequency doubling crystals, or not? But in the case Sean described I assume it is not - he did not mention material hit would be somehow special.

Maybe diachi will know.
__________________
"Lasers are s3xy."
"That feeling when you see colours as their wavelengths."
"Laserpainting is a drug. Do not try it."


Current collection:
405 nm | 500 mW | Wicked Lasers Lunar
445 nm | 3.5 W | Wicked Lasers Arctic
473 nm | 100 mW | Jet Lasers PL-E Pro (Review)
520 nm | 1 W | Wicked Lasers Krypton
532 nm | 100 mW | Wicked Lasers Evo
532 nm | 800 mW | Sky Lasers PL

589 nm | 50 mW | Dragon Lasers Spartan
635 nm | 750 mW | Wicked Lasers Inferno
1 W RGB projector
(+ some laser pointers)

Laserpainting artworks:
LPF thread: Radim's laser painting
Latest laserpainting: The Portal
Instagram: @radimmatera

Please use hashtag #laserpointerforums for laser related stuff when you post on social media to help us promote LPF. Thank you.

Last edited by Radim; 04-04-2017 at 08:44 AM.
Radim is online now   Reply With Quote
Old 04-04-2017, 08:47 AM #9
CurtisOliver's Avatar
Class 3R Laser
 
Join Date: Jun 2015
Location: Brentwood, England (Near London)
Posts: 2,493
Rep Power: 12291
CurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond repute
CurtisOliver CurtisOliver is online now
Class 3R Laser
CurtisOliver's Avatar
 
Join Date: Jun 2015
Location: Brentwood, England (Near London)
Posts: 2,493
Rep Power: 12291
CurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond repute
Default Re: am I actually seeing IR light?

SHG isn't quite the same process, but I can see what you are getting at. It most likely is just a anomaly of the human brain, but it sure would be interesting to find out why.
__________________
View my laser collection



Please make a post in our Member Collections Section. Where you can share your laser collection in one place for all of the forum to see.

Useful Links:
http://darekk.com/kalkulator/wavelength-to-rgb


Feel free to use this +rep icon.
Just right click and open image in new tab,
and then copy and paste the link into those IMG tags.
CurtisOliver is online now   Reply With Quote
Old 04-04-2017, 09:13 AM #10
Radim's Avatar
Class 2M Laser
 
Join Date: Aug 2016
Location: European Union
Posts: 656
Rep Power: 7421
Radim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond repute
Radim Radim is online now
Class 2M Laser
Radim's Avatar
 
Join Date: Aug 2016
Location: European Union
Posts: 656
Rep Power: 7421
Radim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond repute
Default Re: am I actually seeing IR light?

Ah, you are right. My mistake. Sorry about that. That's when I write before I think.
__________________
"Lasers are s3xy."
"That feeling when you see colours as their wavelengths."
"Laserpainting is a drug. Do not try it."


Current collection:
405 nm | 500 mW | Wicked Lasers Lunar
445 nm | 3.5 W | Wicked Lasers Arctic
473 nm | 100 mW | Jet Lasers PL-E Pro (Review)
520 nm | 1 W | Wicked Lasers Krypton
532 nm | 100 mW | Wicked Lasers Evo
532 nm | 800 mW | Sky Lasers PL

589 nm | 50 mW | Dragon Lasers Spartan
635 nm | 750 mW | Wicked Lasers Inferno
1 W RGB projector
(+ some laser pointers)

Laserpainting artworks:
LPF thread: Radim's laser painting
Latest laserpainting: The Portal
Instagram: @radimmatera

Please use hashtag #laserpointerforums for laser related stuff when you post on social media to help us promote LPF. Thank you.

Last edited by Radim; 04-04-2017 at 09:14 AM.
Radim is online now   Reply With Quote
Old 04-04-2017, 09:23 AM #11
CurtisOliver's Avatar
Class 3R Laser
 
Join Date: Jun 2015
Location: Brentwood, England (Near London)
Posts: 2,493
Rep Power: 12291
CurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond repute
CurtisOliver CurtisOliver is online now
Class 3R Laser
CurtisOliver's Avatar
 
Join Date: Jun 2015
Location: Brentwood, England (Near London)
Posts: 2,493
Rep Power: 12291
CurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond repute
Default Re: am I actually seeing IR light?

To be fair, both are TPA (Two Photon Absorption) based processes, just how they achieve it is slightly different. So you wasn't far off with your thinking at all.
And you don't have to apologise, we all get things wrong.
Take a look at this image. Double Excitation seems to take the name more commonly of two-photon fluorescence. How simple.

__________________
View my laser collection



Please make a post in our Member Collections Section. Where you can share your laser collection in one place for all of the forum to see.

Useful Links:
http://darekk.com/kalkulator/wavelength-to-rgb


Feel free to use this +rep icon.
Just right click and open image in new tab,
and then copy and paste the link into those IMG tags.

Last edited by CurtisOliver; 04-04-2017 at 09:26 AM.
CurtisOliver is online now   Reply With Quote
Old 04-04-2017, 09:36 AM #12
Radim's Avatar
Class 2M Laser
 
Join Date: Aug 2016
Location: European Union
Posts: 656
Rep Power: 7421
Radim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond repute
Radim Radim is online now
Class 2M Laser
Radim's Avatar
 
Join Date: Aug 2016
Location: European Union
Posts: 656
Rep Power: 7421
Radim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond repute
Default Re: am I actually seeing IR light?

Yes, I just did not realized what non linearity means at that moment. And nice pic - thanks for sharing.

Edit:
Nice illustration of SHG:




Source: https://en.wikipedia.org/wiki/Second...nic_generation
__________________
"Lasers are s3xy."
"That feeling when you see colours as their wavelengths."
"Laserpainting is a drug. Do not try it."


Current collection:
405 nm | 500 mW | Wicked Lasers Lunar
445 nm | 3.5 W | Wicked Lasers Arctic
473 nm | 100 mW | Jet Lasers PL-E Pro (Review)
520 nm | 1 W | Wicked Lasers Krypton
532 nm | 100 mW | Wicked Lasers Evo
532 nm | 800 mW | Sky Lasers PL

589 nm | 50 mW | Dragon Lasers Spartan
635 nm | 750 mW | Wicked Lasers Inferno
1 W RGB projector
(+ some laser pointers)

Laserpainting artworks:
LPF thread: Radim's laser painting
Latest laserpainting: The Portal
Instagram: @radimmatera

Please use hashtag #laserpointerforums for laser related stuff when you post on social media to help us promote LPF. Thank you.

Last edited by Radim; 04-04-2017 at 09:42 AM.
Radim is online now   Reply With Quote
Old 04-04-2017, 09:39 AM #13
CurtisOliver's Avatar
Class 3R Laser
 
Join Date: Jun 2015
Location: Brentwood, England (Near London)
Posts: 2,493
Rep Power: 12291
CurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond repute
CurtisOliver CurtisOliver is online now
Class 3R Laser
CurtisOliver's Avatar
 
Join Date: Jun 2015
Location: Brentwood, England (Near London)
Posts: 2,493
Rep Power: 12291
CurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond reputeCurtisOliver has a reputation beyond repute
Default Re: am I actually seeing IR light?

That was the sort of picture I wanted to find earlier.
If I knew it was as simple as searching 'two-photon' fluorescence I would of had it ages ago.
__________________
View my laser collection



Please make a post in our Member Collections Section. Where you can share your laser collection in one place for all of the forum to see.

Useful Links:
http://darekk.com/kalkulator/wavelength-to-rgb


Feel free to use this +rep icon.
Just right click and open image in new tab,
and then copy and paste the link into those IMG tags.
CurtisOliver is online now   Reply With Quote
Old 04-04-2017, 07:50 PM #14
Cyparagon's Avatar
Class 4 Laser
 
Join Date: Sep 2007
Location: Wisconsin
Posts: 9,080
Rep Power: 5350
Cyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond repute
Cyparagon Cyparagon is online now
Class 4 Laser
Cyparagon's Avatar
 
Join Date: Sep 2007
Location: Wisconsin
Posts: 9,080
Rep Power: 5350
Cyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond repute
Default Re: am I actually seeing IR light?

IR appears red. If you're seeing a grey or blue, that is likely spontaneous emission from the laser diode.
__________________
A problem well stated is a problem half solved.
Cyparagon is online now   Reply With Quote
Old 04-04-2017, 08:00 PM #15
Radim's Avatar
Class 2M Laser
 
Join Date: Aug 2016
Location: European Union
Posts: 656
Rep Power: 7421
Radim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond repute
Radim Radim is online now
Class 2M Laser
Radim's Avatar
 
Join Date: Aug 2016
Location: European Union
Posts: 656
Rep Power: 7421
Radim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond reputeRadim has a reputation beyond repute
Default Re: am I actually seeing IR light?

Thanks. Makes sense - do you have some link for more reading about that?
__________________
"Lasers are s3xy."
"That feeling when you see colours as their wavelengths."
"Laserpainting is a drug. Do not try it."


Current collection:
405 nm | 500 mW | Wicked Lasers Lunar
445 nm | 3.5 W | Wicked Lasers Arctic
473 nm | 100 mW | Jet Lasers PL-E Pro (Review)
520 nm | 1 W | Wicked Lasers Krypton
532 nm | 100 mW | Wicked Lasers Evo
532 nm | 800 mW | Sky Lasers PL

589 nm | 50 mW | Dragon Lasers Spartan
635 nm | 750 mW | Wicked Lasers Inferno
1 W RGB projector
(+ some laser pointers)

Laserpainting artworks:
LPF thread: Radim's laser painting
Latest laserpainting: The Portal
Instagram: @radimmatera

Please use hashtag #laserpointerforums for laser related stuff when you post on social media to help us promote LPF. Thank you.
Radim is online now   Reply With Quote
Old 04-04-2017, 08:02 PM #16
diachi's Avatar
Class 4 Laser
 
Join Date: Feb 2008
Location: Yellowknife, NT, Canada
Posts: 7,589
Rep Power: 12740
diachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond repute
Send a message via Skype™ to diachi
diachi diachi is online now
Class 4 Laser
diachi's Avatar
 
Join Date: Feb 2008
Location: Yellowknife, NT, Canada
Posts: 7,589
Rep Power: 12740
diachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond repute
Send a message via Skype™ to diachi
Default Re: am I actually seeing IR light?

We've seen ~490nmn from ~980nm diodes before, so not all that surprising.

See this post: Confirmed cheap multi-line 980nm/490nm pen

Whole thread may actually be worth a read for anyone that hasn't seen it already.
__________________


445nm | Sanwu Laser Pocket Series | 400mW Metered
445nm | NDB7242E Pen Build | 60mW Metered | >>Build Thread<<
450nm | LaserPointerStore - Thor H2 | 1W(?) | Review Unit - Awaiting Arrival | >>LaserPointerStore Thread<<
488nm | Spectra Physics 163 Argon | ~30mW Metered
515nm | PL515 Pen Build | 50mW Metered | >>Build Thread<<
520nm | Laserlands 520 | 5mW | Review Unit | 3mW metered | >>Review<<
532nm | Gearbest 303 Pointer | 50mW Metered
532nm | Gearbest JD.850 Pointer | 30mW Metered (I think, need to re-test).
633nm | HeNe | 6mW
633nm | Spectra Physics 155 HeNe | <1mW >>Thread<<
650nm | Sanwu Laser Pocket Series | 200mW Metered
808nm | Melles Griot 532nm Lab Unit | No Crystals >10W | X2



Check out my Reddit Subreddit! >>/r/laserpointers<<


Last edited by diachi; 04-04-2017 at 08:03 PM.
diachi is online now   Reply With Quote
Reply





Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On











Loading












Privacy Policy | Advertising Disclaimer | Terms of Use


 


All times are GMT. The time now is 08:35 AM.


Powered by: vBulletin
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO
Privacy Policy | Advertising Disclaimer | Terms of Use
Copyright (C) 2017 Laser Pointer Forums, LLC