Long exposure laser pictures......

[greenlasersrule]

idea from the 'My modified greenie vs ordinary red laser' thread with the long exposure picture of his lasers. Basically take pictures of your laser on interesting surfaces/liquids anything, with long exposure picture 1-2 seconds or more. you can get some interesting resutls, i shone my laser on a orange uv rist band thingy and you get green and orange, looks pretty kool i though /ubbthreads/images/graemlins/smile.gif

 

[sharkeeper]

That pumpkin is on the receiving end of about 2 watts of 532. The beam looks brighter because of the steam coming out of the pumpkin as the beam heats the flesh and boils off the water.

Cheers!

 

[i7r7]

Hey, good idea, start a gallery forum. Which brings me to the next idea, wouldn't it be great to have a dedicated mini website on CPF which is dedicated to pictures, beamshots, show-offs etc.

Anyway, turned off the lights, drew the curtains and got out my digital camera:

My greenie with a linear expansion lens (obtained from a laser printer) going through a fan... looks pretty ordinary with 1/25 sec exposure.

Forced 2 sec exposure:

Now that's a little more interesting. Now eveyone knows the meaning of overexposure /ubbthreads/images/graemlins/cool.gif

Jeff

 

[OddOne]

Anybody got a chunk of KTP big enough for my Nd:glass laser? Here's the rod from it:

25mm x 250mm Hoya RG8, estimated threshold power requirement of 2,200 joules, works quite nicely with a pump energy of 75,000 joules (albeit at the detriment of the cavity mirrors - 1KJ+/cm2 is a bit much).

If I could get a KTP chunk hooked up to it I might can draw a visible smiley-face on the moon. /ubbthreads/images/graemlins/grin.gif
/ubbthreads/images/graemlins/grin.gif

oO

 

[iddibhai]

what is *that*??

 

[kakcoo]

Oooh.. -Big- ruby... *Must have*Oo.. Build laser.. Explode gasstations from 20 miles away.

 

[kakcoo]

Where did you get that? Wanna sell it? How much? If not, keep us up'to'date about your project..

 

[OddOne]

The rod came from LLNL's Shiva laser array. It was a spare single-pass amplifier rod. When I got my mitts on it, it was still wrapped in paper wrapping for storage.

I've been told it's worth about $35,000 new. Worked a deal for it and a couple of its kin, and ended up with it for free. /ubbthreads/images/graemlins/grin.gif

oO

 

[IsaacHayes]

Wow, and wow at how much it's worth!!! Unless I had the means to utilize that rod fully, i'd be selling it!! $$$!

Btw nice pics everyone, I esp. dig the cooking jackolantern!!

 

[greenlasersrule]

im kinda new to the laser scene lol, err... what is that rod thingy for and how does it work? i have never seen one b 4, also why does it cost so much? thanks

 

[kakcoo]

It's a ruby for rubylasers. If you place a mirror on one side, a half transparent mirror on the other, put flashlamps around it, place it in a crome tube an give high voltage you should be able to blow all the gasstations in town from your own bedroom window /ubbthreads/images/graemlins/cool.gif
Here is a short guide

 

[The_LED_Museum]

It looks like a rod of Nd:YVO4 (neodymium yttrium vanadium oxide)-doped glass to me. The purple color is caused by neodymium (a metal), and it can produce a laser line at 1,064nm (infrared) when exposed to a strong light, such as from xenon flashlamps or very high wattage halogen light bulbs.

This is like the Nd:YV04 block found in green laser pointers, but can emit many thousands of times more laser radiation.

I believe kakcoo has it right - if you place a fully reflective mirror on one side, and a partially reflective mirror on the other, the rod will lase when you flash it or otherwise expose it to strong light.

 

[FNinjaP90]

OMGOMG ruby lasers are teh 0wnZ.