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underwater test shots

brucemir

brucemir

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Aug 3, 2012
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These pics were taken using a Laserbtb HL-445nm 100mw D50M laser, which can be used underwater. I used a 2.5 gallon aquarium and only submerged the nose of the laser about an inch in the water. I am still quite apprehensive about putting the whole unit underwater even though Offroads posted a demonstration of total submersion. Eventually I will do this when, and if I get a bigger tank, or if I have a good reason to. I was not trying to be "artsy" with these pics, but this was just an experiment to see how the beam behaves underwater. On the bottom of the tank I used a mirror, a prism, a reflective fan diffraction grating, and a beam splitter to see what happens. The beam(s) was more stable than I thought it would be. And even when using a diffraction grating, the reflected beams are still slightly visible.


mirror


mirror


against bottom glass in tank


when changing the angle of the laser, water acts like a lens focusing the beam


mirror


mirror (photographed from above)


mirror (photographed from above)


prism set up


prism


prism


reflective fan diffraction grating


reflective fan diffraction grating


reflective fan diffraction grating


reflective fan diffraction grating


reflective fan diffraction grating


beam splitter


beam splitter


beam splitter
 





Bruce, nice photos as always. The water sure seems to reduce the effect that the grating, prism, and beam splitter have on the beam.

Glad to see some new photos coming our way, we've missed your photonic artistry lately!
 
Hey BowtieGuy,
Thanks! I thought since the laser used is 1000mw, it would light up the tank more than it did and drown out the beam, which it didn't. It was very cool photographing this as it was an easy set up, and no fog was used. I think this weekend I will set it up again after I shoot my "normal" laser ideas and use fog to enhance what light comes out of the tank.

I have not posted any photos in a while but I have still been photographing my lasers every weekend. I have many sets I have not yet posted. When I get home from work I will post a set using a Slinky toy and some mirrors that came out exceptionally well.
Have a good one!
 
Thanks for posting those photos - Cool to see. Because the refractive index difference of water, surface coatings will all misbehave, and thus optical components will behave differently than expected - reflecting when expected to pass etc.
 
I don't think you know how not to be "artsy" lol
Always enjoy your shots;)
 
I need to start giving out more rep... Have no idea how many more people I need to give it to.
 
Last edited:
brucemir said:
These pics were taken using a Laserbtb HL-445nm 100mw D50M laser, which can be used underwater. I used a 2.5 gallon aquarium and only submerged the nose of the laser about an inch in the water. I am still quite apprehensive about putting the whole unit underwater even though Offroads posted a demonstration of total submersion. Eventually I will do this when, and if I get a bigger tank, or if I have a good reason to. I was not trying to be "artsy" with these pics, but this was just an experiment to see how the beam behaves underwater. On the bottom of the tank I used a mirror, a prism, a reflective fan diffraction grating, and a beam splitter to see what happens. The beam(s) was more stable than I thought it would be. And even when using a diffraction grating, the reflected beams are still slightly visible.


mirror


mirror


against bottom glass in tank


when changing the angle of the laser, water acts like a lens focusing the beam


mirror


mirror (photographed from above)


mirror (photographed from above)


prism set up


prism


prism


reflective fan diffraction grating


reflective fan diffraction grating


reflective fan diffraction grating


reflective fan diffraction grating


reflective fan diffraction grating


beam splitter


beam splitter


beam splitter
Click to expand...

A detailed set of equations solves th is
 
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