Welcome to Laser Pointer Forums - discuss green laser pointers, blue laser pointers, and all types of lasers

Buy Site Supporter Role (remove some ads) | LPF Donations

Links below open in new window

FrozenGate by Avery

My top secret project- but what is it :-P

I dont know if this has anything to do with what you are experiancing but..

I noticed the other day when shining a 16mW BR pointer across the length of my aquarium, when the beam hits the corner I get a multicoloured rainbow effect. It can be seen from across the room but not up close. The diode is an 803t running just above threshold.

Im going to try to get pic, but im not sure if it will show up. This is not the first time I noticed this, you can see a rainbow effect with red as the dominent colour.

Anyone else tried this?

Okay took a couple of pics ;) I can see the colour as if white light is passing a prism. It has too much glare in the pics, but up close you can see a very yellowy green teal, blue and red. If you have an aqurium, try it with the lights out, very neet :)


P1200642.jpg

P1200647.jpg
 





What you are doing,in effect, IS CREATING a prism. By using the 2 panes of glass that make up one side, & either the front or back pane, the beam of the laser 'creates' the base of the prism, while the corner where the 2 panes meet, creates the apex of the 'prism'. If a beam of sunlight enters your aquarium at the right angle, you'll get the very same effect. So, your 'TOP SECRET PROJECT' was you creating a prism, with 2 panes of glass, some water, & your laser. I noticed the very same effect with my aquarium. It makes for a beautiful effect ;) rob 8-)
 
phoenix77 said:
What you are doing,in effect, IS CREATING a prism. By using the 2 panes of glass that make up one side, & either the front or back pane, the beam of the laser 'creates' the base of the prism, while the corner where the 2 panes meet, creates the apex of the 'prism'. If a beam of sunlight enters your aquarium at the right angle, you'll get the very same effect. So, your 'TOP SECRET PROJECT' was you creating a prism, with 2 panes of glass, some water, & your laser. I noticed the very same effect with my aquarium. It makes for a beautiful effect ;)  rob 8-)
Click to expand...


Coherent light cant be maipulated that way with a prism from what I know. And for some reason this same thing does not work with a green or red. I believe there must be more to this.

BTW- Its not my top secret post :D

* I think I got it. The 405 is floresing the silicone in the corner of the tank. Its translucent and may be giving the whitish light which the pseudo prism is then separating. I figure that is the most likely as there are none of the separated colours in the reflected beam. Im still going to buy a prism to play with though :)
 
or... you've just discovered a new, super cheap, frequency divider crystal! (if there is such a thing?) ;D
 
To Viracocha, Now THAT would be a project worthy of a 'TOP SECRET' rating ;) rob aka phoenix77 8-)
 
Viracocha said:
or...  you've just discovered a new, super cheap, frequency divider crystal! (if there is such a thing?)  ;D
Click to expand...

Isn't there a frequency doubling crystal. To double frequency hence turning 780nm into 370nm?

I'm very intrigued what this "secret" is.
 
Coherent light CAN be split with a prism like regular light, BUT it is weird that since the blu-ray diodes are monochromatic you are getting other colors. I guess it could come from an adhesive material glowing under the BR light. That is rather interesting though!

Now Smidsy... what is this uber top secret project??? Is is just an LED or is it an actual laser diode?
 
GooeyGus said:
Coherent light CAN be split with a prism like regular light, BUT it is weird that since the blu-ray diodes are monochromatic you are getting other colors. I guess it could come from an adhesive material glowing under the BR light. That is rather interesting though!

Now Smidsy... what is this uber top secret project??? Is is just an LED or is it an actual laser diode?
Click to expand...


I really am no longer sure myself, Its an LD (NOT an LED) but only seems to output in the UV spectrum with minuscule output in the Visible.

It cant be BR as that peaks at 405nm and this seems to peak much lower- things fluoresce but the laser is virtually invisible.

Im going to take it to my physics Dept see what they make of it as they can measure the peak wavelength (measured one of my red lasers for me)

I think I may have bought a BR but its a dud as the wavelength it outputs is too low- is this possible.

I can take more pics of you want- it has adjustable focus :-)
 
Well, how powerful is it? And who did you buy it from so we can get more? hehe...
 
Ok gave it to PHY dept at college. they are unable to accurately verify power or wavelength as its peak is in the UV (as I thought).

They suggest its probably dangerous and for me not to use it :-D

LOL

as for where i got it i think it was either fleabay or somewhere else (was a while ago...)

now the question on my mind is what the f*uck is it? Is it a defective BR? Or a UV diode/ do they even exist?
 
SMIDSY said:
Ok gave it to PHY dept at college. they are unable to accurately verify power or wavelength as its peak is in the UV (as I thought).

They suggest its probably dangerous and for me not to use it :-D

LOL

as for where i got it i think it was either fleabay or somewhere else (was a while ago...)

now the question on my mind is what the f*uck is it? Is it a defective BR? Or a UV diode/ do they even exist?
Click to expand...

Very interesting. Maybe defective BR = UV LD? :-/
 
IDK I ant opinions. Its reallydifficult to photograph as the camera picks up this royal blue colour wich is NOTHING like what it really looks liek its a very very pale sort of violet colour. and the college condirms its <400nm.....
 
How does it compare in colour to a normal blu-ray (405nm)?

Is there any other way to know the wavelength?
 
I don't think it is in the unsafe UV range, as far as I was aware UVC ( the dangerous one ) is right far into the UV and would be not at all visible.

-Adam
 
You must log in or register to reply here.


Back
Top