Ultraviolet Night Diving

General banter about diving and why we love it.
LarsB
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Re: Ultraviolet Night Diving

Postby LarsB » Sat Jul 05, 2014 12:19 pm

Even more great info about underwater fluorescence and fluorescence diving can be found here:

http://www.fluomedia.org/science/
http://www.fluopedia.org/publications/

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DFessler
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Re: Ultraviolet Night Diving

Postby DFessler » Fri Aug 30, 2013 10:39 pm

I have used them here with not much to see due to our specific life but I had employee who did a study abroad in Bonaire who found this to be her favorite dives up there. They did them regularly at night so I would try it if I was you.
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LarsB
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Re: Ultraviolet Night Diving

Postby LarsB » Fri Aug 30, 2013 3:51 am

BTW, everything you ever wanted to know about underwater fluorescence explained:

On The Rise: Fluorescence Night Dives - Background, Basics and Techniques

jerryehrlich
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Re: Ultraviolet Night Diving

Postby jerryehrlich » Wed Dec 26, 2012 1:05 pm

Jeremy wrote:Thinking of doing this in Bonaire.

Anyone have a chance to try this? Could you share your experience? Sounds amazing with the flourescence being quite different from bioluminescence.

Image


Yes, we have one at Hoodsport n Dive, with the mask filter. It did not light things up in cold water like we thought it would, and the mask filter is a hassle.
Maybe there is something, somewhere in our waters where it is impressive, we have yet to find it.

Good Diving,
Jerry

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Re: Ultraviolet Night Diving

Postby Jeff Kruse » Wed Dec 26, 2012 7:01 am

Since many of us still use supper bright 21W HID’s can we just put a filter on the HID? Would we then still need filter on our masks? Or is the output of the 21W HID and filter not going to be very good? Do you have filters for the Halcyon style HID lights?

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CaptnJack
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Re: Ultraviolet Night Diving

Postby CaptnJack » Sun Dec 23, 2012 7:39 pm

lundysd wrote:Richard there are 1-2W 445nm diodes now available -- check this forum for more details:

http://laserpointerforums.com/f64/

This isn't quite 450-500nm, but there *should* be enough spectral overlap for most things you'd be considering (like visualizing fluorescein perhaps? :))


Alas they are rediculously expensive. The 473nm laser is $330 for instance.
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sitkadiver
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Re: Ultraviolet Night Diving

Postby sitkadiver » Sun Dec 23, 2012 5:46 pm

I have never built a black light myself, but a buddy of mine built himself a black light in the early 90's to shoot macro with. They don't put out a ton of visible light and I think the shorter wavelengths get absorbed in the water column fairly quickly.

Not sure if this helps, but I am guessing macro is what you'll want to start with. Also, I don't recall his camera settings at the time, but he was shooting 1600 ektachrome and close range. Obviously the low light level required the faster film. Not sure how a digital camera will respond, but I'm looking forward to hearing your results.

Good Luck.
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lundysd
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Re: Ultraviolet Night Diving

Postby lundysd » Sat Dec 22, 2012 11:22 am

Richard there are 1-2W 445nm diodes now available -- check this forum for more details:

http://laserpointerforums.com/f64/

This isn't quite 450-500nm, but there *should* be enough spectral overlap for most things you'd be considering (like visualizing fluorescein perhaps? :))

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BASSMAN
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Re: Ultraviolet Night Diving

Postby BASSMAN » Sat Dec 22, 2012 9:00 am

Nwbrewer wrote:
Alexitt wrote:Very Cool!!! This begs the question though... Where does one come up with a waterproof blacklight???? and How much to aquire one???


Most LED Dive lights could be moded easily. Especially something like an SL4 or 6. UV drop ins can be had from DealExtreme or ebay for a couple of $.


http://www.ebay.com/itm/CREE-Purple-Lig ... 25682c28de

H20doc,
Have you played with this yet?
I'm thinking about modifying my SL3 with this :smt064
( :smt035-->Man)
I am a man with no toes. Soon to be a scuba diver, with no toes!!!
How cool is that? :supz:

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CaptnJack
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Re: Ultraviolet Night Diving

Postby CaptnJack » Fri Dec 21, 2012 9:53 am

Does anyone know where I can get a module or adapt a module so I can get 450-500 nm light? (obviously underwater) Slightly longer wavelength than mentioned here.
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Re: Ultraviolet Night Diving

Postby Fordman » Sun Oct 21, 2012 1:02 am

We did this in Wakatobi Indonesia earlier this year. Yellow lense over your mask, 4000 lumen light with lense cover...crap I can't remember if it was black or blue. Incredible scenery and the best part was that the sea life wasn't scared and swam away. I was petting a porcupine fish. You can get right up on anything.

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Re: Ultraviolet Night Diving

Postby LarsB » Wed Oct 17, 2012 10:17 pm

Tom Nic wrote:I would love to have some of our DIY nerds figure out the best way to do it on our own, make a cover for the Dusty light and our masks, and spend the 80 on two dinners at the Rib factory!!

See e.g. here: http://www.firedivegear.com/science/spectrographs/ :

"As mentioned earlier, the best combination is a torch with high performance blue LEDs and a dichroic filter. However, some have found the results of just using a dichroic filter over a white light source "gets the job done" to their satisfaction. This is why we offer custom filters and mounts for many white light torches."

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Tom Nic
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Re: Ultraviolet Night Diving

Postby Tom Nic » Wed Oct 17, 2012 4:38 pm

BASSMAN wrote:
Tom Nic wrote:IIRC most outfits in Bonaire use a light cannon with some sort of lens that you bungie over the end, combined with lenses that you kit over your mask - both are necessary to get the effect.

We checked into it while in Bonaire (last June) $80.00 and a local dives op will provide the gear light and mask options. When I asked if it was worth the $80.00, We were told, "everyone should try it, at let once."
I might add it to the Bonaire budget, for the next trip, but $80.00 is a couple of Rib Factory dinners and a few Gillatto's sp?) So I'm still undecided.


I would love to have some of our DIY nerds figure out the best way to do it on our own, make a cover for the Dusty light and our masks, and spend the 80 on two dinners at the Rib factory!!
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BASSMAN
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Re: Ultraviolet Night Diving

Postby BASSMAN » Wed Oct 17, 2012 12:45 pm

Tom Nic wrote:IIRC most outfits in Bonaire use a light cannon with some sort of lens that you bungie over the end, combined with lenses that you kit over your mask - both are necessary to get the effect.

We checked into it while in Bonaire (last June) $80.00 and a local dives op will provide the gear light and mask options. When I asked if it was worth the $80.00, We were told, "everyone should try it, at let once."
I might add it to the Bonaire budget, for the next trip, but $80.00 is a couple of Rib Factory dinners and a few Gillatto's sp?) So I'm still undecided.
( :smt035-->Man)
I am a man with no toes. Soon to be a scuba diver, with no toes!!!
How cool is that? :supz:

LarsB
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Re: Ultraviolet Night Diving

Postby LarsB » Mon Oct 15, 2012 1:42 am

P.S.: If you are interested in bio-luminescence, then have a look at this video: https://www.dropbox.com/sh/q6nhp5girta4vnq/tdHZj99n6I

They used starlight cameras (normally used by astronomers for their observations) which are extremely sensitive to light, in order to discover the giant squid in the deep sea. They did not quite succeed, even though there is a faint something which very likely was a giant squid, but the footage is amazingly beautiful, and the whole endeavour is fascinating!

Have fun!

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Re: Ultraviolet Night Diving

Postby LarsB » Mon Oct 15, 2012 1:04 am

oregondiver wrote:Scuba board has this incredible guy named Lars B (or just plain ole Lars?) who can go all technical and awesome at teh drop of a penny. So if you ask HIM questions...be prepared for an answer.


Dear oregondiver,

thanks a lot for the high esteem and compliments! :-)

Actually UV light (< 400 nm) has a slight advantage but also quite a disadvantage:
The advantage is that you don't need any filters, neither for your mask nor for your camera.
The big disadvantage is that UV light does not stimulate fluorescence as much as does blue light.
There are even corals that do not fluoresce in UV light at all, but they do with blue light.
On top of that, high-power UV LEDs are much more expensive and less powerful than comparable blue LEDs.
(And I am not talking about 5 mm LEDs here, obviously!)

Results with UV light around 400 nm aren't much better. See here http://www.youtube.com/watch?v=Jop8jQYRBQ8 for a comparison with a small torch with blue light (the brighter one) and a torch with a UV LED (the much darker one).

So unless you want to experiment or take fluorescence photos or videos different from most other people, blue light is much better! Probably because marine life has adapted to water, which is more transparent to blue light than it is to UV. The downside is however that you will also need the right filters.

This is all described in detail here http://www.firedivegear.com/products/#technology and here: http://www.firedivegear.com/science/barrierfilters/

You might also want to read http://www.firedivegear.com/science/excitationfilters/ in order to find out why blue excitation filters are necessary in addition to the blue light source (LEDs).

Hope this helps not to waste your money.

In order to see fluorescence with UV, you need a really powerful torch, which will cost about 400 Euros for the LEDs (4x Nichia NC4U133A) alone.

See here http://picasaweb.google.com/ostbey/HowT ... ivingLamp3 for such a torch and here for a video made with that torch: https://picasaweb.google.com/1108157129 ... 8634462546

And see here for a smaller UV torch http://picasaweb.google.com/ostbey/HowT ... ivingLamp2 (2x Nichia NCSU033B) and here for the pitiful results obtained with it: https://picasaweb.google.com/1108157129 ... 8695653586

Now compare that to a video taken with blue light: http://www.youtube.com/watch?v=4V9TCdCbX6U

Good luck!

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dwashbur
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Re: Ultraviolet Night Diving

Postby dwashbur » Mon Sep 17, 2012 10:22 pm

H20doctor wrote:And I cant ? I've been building Dive lights since 1990.. I don't doubt dusty can.. it's a matter of does he want to?.. not every diver wants a UV set up.. and it's a matter of just throwing the module into SLK.. anyone here on the board can do that

I don't know if you can or not, I don't know you. I do know Dusty and have one of his lights and love it. Take a chill pill, bro.
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H20doctor
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Re: Ultraviolet Night Diving

Postby H20doctor » Mon Sep 17, 2012 9:21 pm

And I cant ? I've been building Dive lights since 1990.. I don't doubt dusty can.. it's a matter of does he want to?.. not every diver wants a UV set up.. and it's a matter of just throwing the module into SLK.. anyone here on the board can do that
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dwashbur
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Re: Ultraviolet Night Diving

Postby dwashbur » Mon Sep 17, 2012 8:50 pm

H20doctor wrote:
dwashbur wrote:Hey, Dusty! Interchangeable heads for your Dusty's Lights?????


um did you read? wrong voltage..3.7 volts.. the Chip is 3 watts max voltage

If anybody can figure it out, he can.
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H20doctor
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Re: Ultraviolet Night Diving

Postby H20doctor » Mon Sep 17, 2012 6:54 pm

dwashbur wrote:Hey, Dusty! Interchangeable heads for your Dusty's Lights?????


um did you read? wrong voltage..3.7 volts.. the Chip is 3 watts max voltage
NWDC Rule #2 Pictures Or it didn't Happen

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dwashbur
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Re: Ultraviolet Night Diving

Postby dwashbur » Mon Sep 17, 2012 3:55 pm

Hey, Dusty! Interchangeable heads for your Dusty's Lights?????
Dave

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Re: Ultraviolet Night Diving

Postby KneeDeep » Mon Sep 17, 2012 3:29 pm

Wow.. I missed this post. I have a topical tank at home with lots of hard corals, and when I only turn on my Actinic lights (12,000 Kelvin range) I get this. It's amazing... almost looks like a 70's black velvet poster :)
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oregondiver
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Re: Ultraviolet Night Diving

Postby oregondiver » Mon Sep 17, 2012 3:08 pm

I have a UV dive light on my xmas list. Scuba board has this incredible guy named Lars B (or just plain ole Lars?) who can go all technical and awesome at teh drop of a penny. So if you ask HIM questions...be prepared for an answer.

Anyway, there are serveral options (sounds like H20Doc is the man to make one!). NightSea offers them

http://guest.engelschall.com/~sb/fluo-diving/
Excellent discourse/links/information

http://www.firedivegear.com/products/torches/
As of today, 1/2 the owners of this company are diving in asia but they said they can get me one for under $200 for what i want it to do.

http://www.tek-tite.com/src/products.php?c=3025
This company (again today...) sent me this link for their Flouro diving lights

And last of all...You can order woods glass to go OVER your HID light (look on scuba board and a guy I have been talking to did this, along with pictures) http://www.bhphotovideo.com/c/search?Nt ... yes&sts=ma
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Jeremy
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Re: Ultraviolet Night Diving

Postby Jeremy » Sun Sep 16, 2012 9:44 pm

H20doctor wrote:the drop in would be the easy way .... as it has the driver all ready in it and i can Frankenstein the bad boy ..


How many do you want to make?

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Jeremy
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Re: Ultraviolet Night Diving

Postby Jeremy » Sun Sep 16, 2012 9:41 pm

Image

Image

Image


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