Multi Line Argon & Long Pass Filter

I got a chance to play with some of the optics out of my sequencer last night. One of the coolest ones is something called a "long Pass Edge Filter." This one is a "532 EFLP" When you shine the multi-line argon at right angles to the filter, it reflects 100%. As you turn it though, magic happens . . . .

As you turn it the filter begins to split the beam about 50-50. However, what is split is too cool. At the first, the green line is passed and the violet line is reflected. As you continue to turn it the colors go through a gradual shift through the color lines until at the farthest angle the violet line is being passed and the green line is being reflected!! This shift happens smoothly and gradually. You can make the beams any color gradient you desire all along the color range of the tube. It is NOT broken up discretely like when the beam is reflected off of or shined through a grate. It is smooth and gradual.

If you have a multi-line argon, get yourself one of these filters.

Peace,
dave

Dave -- I just got a wierd glass prism from ebay. Senkat told me about it. First tests look good for busting up a ML Argon. Diffraction gratings give bunches of lines and "stuff". \

I want a series of dots.

Mike

Hemlock Mike said:

Dave -- I just got a wierd glass prism from ebay. Senkat told me about it. First tests look good for busting up a ML Argon. Diffraction gratings give bunches of lines and "stuff". \
I want a series of dots.
Mike

Click to expand...

Like this? Ignore the up and down "smear" that my movement caused. The dots are round and discrete IRL like the upper photo. This is from a generic, flat diffraction mirror.

At "idle" (4A)


At 6A


At 8A it adds another blue dot in the gap and the dim green dot brightens

There was also a concave diffraction mirror in the sequencer. It give me a repeating "series" of colored dots.

Peace,
dave

That's what I want ;D

Back later --- 4 color show in my back yard!!!!!!

Mike

Hemlock Mike said:

That's what I want ;D

Back later --- 4 color show in my back yard!!!!!!

Mike

Click to expand...

;D I had huge colored dots all across my block wall last night ;D


The flat diffraction mirror throws the rainbow dots in two different directions. They come back at about 23 degrees on either side of center. There is also a direct reflection (on center) of the complete argon beam. You can also break this one up, reflecting in the opposite direction, and have the colored beam "fans" crossing in the air (very cool with fog in the air).

Peace,
dave

Where would someone get something like that from? I'd love to be able to separate out the lines on my argon better than can be done with a diffraction grating.

Man, I wish you could modulate argons (without external optics or mechanical flagging) otherwise I'd buy one for my scanner :'(

Anyone ever seen photonic crystal fiber?  (vs regular old fiber optics)  It will multiply and divide a frequency so that if you shine a red laser in,  the cable will transition through all the colors of the rainbow, and the output will be white.  Look it up on wikipedia if you dono what I'm talking about.  Unfortunately it's new and VERY expensive..   Probably easier/cheaper to make it yourself, if you can learn to pull glass.
But, they're starting to make light synths out of them.  I was reading about them late last night, but I think the general idea was that the length of the cable determines the output frequency/color.



(I love my argon! Supposed to be under 100mw, but it will instantly light a cigarette w/out any focusing. My 300+ mw red diode doesn't come close to that capability. Every time I read this forum I get the urge to power that circuit breaking beast up)

That fiber sounds amazing

Btw, I can't help to think of a liquid sky effect using your filter instead of a mirror daguin It should look so awesome with one extremity of the plane green and then slowly changing to violet towards the other.And you should get 2 fans opposed to each other with the colours reversed, right?

Switch said:

That fiber sounds amazing

Btw, I can't help to think of a liquid sky effect using your filter instead of a mirror daguin It should look so awesome with one extremity of the plane green and then slowly changing to violet towards the other.And you should get 2 fans opposed to each other with the colours reversed, right?

Click to expand...

What a cool idea! Imma try this

I don't think it will give two fans though. You seem to be mixing the long pass filter and the diffracting mirror here. Or am I misunderstanding?

Peace,
dave

wicked1 said:

(I love my argon!  Supposed to be under 100mw, but it will instantly light a cigarette w/out any focusing.  My 300+ mw red diode doesn't come close to that capability.  Every time I read this forum I get the urge to power that circuit breaking beast up)

Click to expand...

What model is it?  

I have the same problem with mine, I can only run it continuously at 8A or else it starts blowing breakers ;D

wicked1 said:

Anyone ever seen photonic crystal fiber? (vs regular old fiber optics) It will multiply and divide a frequency so that if you shine a red laser in, the cable will transition through all the colors of the rainbow, and the output will be white. Look it up on wikipedia if you dono what I'm talking about. Unfortunately it's new and VERY expensive.. Probably easier/cheaper to make it yourself, if you can learn to pull glass.
But, they're starting to make light synths out of them. I was reading about them late last night, but I think the general idea was that the length of the cable determines the output frequency/color.

Click to expand...

Yes I have, I sold them on ebay a while back, got them in a lot of prototype optics at a Coherent auction. On the 'bay they went for a song, usually $10 to 40.00 for a lot of 2 of them. The only drag was they were meant to be pumped with femptosecond ti-sapphire lasers, though won could use them for green to IR light with an littrow tuner and a q-switched yag laser.