laser wavelength change?

Blade · Nov 22, 2011

Fiddy said:
what did you do with your 'sometimes ~500nm' one?

yeah i exchanged it cuz it began putting out a noticeably lower output. even the dot became dimmer. so i wasnt gonna let my money go to waste. and yeah, the darn thing mode hopped to TEM30 constantly and soon i gave up :yabbmad:...

StardustSprinkles · Nov 22, 2011

VERY rude tags you guys..... He seems to know more than any tr0ll and I don't blame 'em a bit for returning a mode hopping laser. Just say'n.

foulmist · Nov 22, 2011

Well, I didn't put those tags at all ... I just saw them and I thought it was funny

Don't take everything to seriously... after all the OP didn't actually have serious proof about the whole thing ... so people assumed it might be fake..

that's how the world goes

Atomicrox · Nov 22, 2011

Blade said:
i never tried this, but i believe you might be able to use a prism. (just another alternative maybe)

BTW i recieved my replacement laser not too long ago and its way more stable than the other :wave:

I tried a prism, didn't see more than one wavelength.

I'll try the diffraction grating when I get one, meanwhile I welcome any suggestions.

Blade · Nov 23, 2011

foulmist said:
Well, I didn't put those tags at all ... I just saw them and I thought it was funny

Don't take everything to seriously... after all the OP didn't actually have serious proof about the whole thing ... so people assumed it might be fake..

that's how the world goes

i dont blame them for thinking that, which is why im not worried bout the tags. but i didnt have the right stuff to give real proof and stuff so thats another reason i gave up. but i still thought it was worth posting to see if anyone else had similar experiences or had any info on such phenomena.

G4nJ4M4n · Dec 7, 2011

Hi all,

Im new here and i know ur reaction might be "whaa?" I work with graphics, designs, etc... Im not accusing "Blade" guy i just want to show something and you all can decide urself. Here is the same picture on the left (original has natural consistent exposure fading ) and edited on the right (added HUE of blue and creating a visible exposure "ring " barrier ):

Then try to compare his two types of photos. Any other explanation is welcome.
My english is not very good so i hope you understood well what i was trying to say here.

Thanks

Dave.

weeba2kv · Dec 7, 2011

So your saying that when you change or add blue in that photo with PS you can expose the littlebit of 473nm in 532 laser light ?

Things · Dec 7, 2011

No, you are simply changing the hue of the overall colour. The amount of 473nm light emitted is so tiny, that some lasers won't produce any at all, and others will look like a very faint blue dot if you look into them with goggles. You can't actually see the dot on the wall at all.

G4nJ4M4n · Dec 7, 2011

Forget about lasers.. Ever you used photoshop or any other picture editor? if yes you must be heard of HUE so i think it was easiest way to make it that kinda color, ofc w/o knowledge of photo being affected and any guy like me would definitely notice "cheap" trick.

weeba2kv · Dec 7, 2011

LOL don't think i belive that photoshop crap can reveal the blue in a green laser

Blade · Dec 7, 2011

i dont even own any photo editing program :crackup: and that ring thing is from the laser being so bright. you can probably get that from any laser dot you take a picture of, especially with cheap cameras. and of course that ring is gonna be different if the color is different... btw i saw a post of someone else having a similar experience on this forum (not sure where though)

and welcome to the forum G4nJ4M4n

G4nJ4M4n · Dec 7, 2011

As i said im not accusing so you dont need to explain urself, it was only an opinion if it were a fake. You know best if it's true or not so chillax :umbrella:

BShanahan14rulz · Dec 7, 2011

weeba, he was just showing you how easy it is to falsify pictures. He's not trying to show how to detect other wavelengths that lasers are emitting. Cameras just aren't good for that sort of stuff. I don't know why you think that adjusting the hue of a photo can give you information about constituent wavelengths of a beam, but you are wrong on that bit. You can modify a photo to show whatever you want. I can take a picture of a green laser and make it look like a rainbow. That doesn't mean that the green laser is a full-spectrum eximer or something crazy.

Thanks, ganjaman, for the example :beer:

Blade · Dec 7, 2011

gotcha

anyway, your examples were pretty interesting...

BShanahan14rulz said:
That doesn't mean that the green laser is a full-spectrum eximer or something crazy.

that would be cool!

BShanahan14rulz · Dec 7, 2011

yeah, I'm still waiting for someone to make a handheld argon first ;-)

Who knows, maybe you got lucky and got some strange crystal set for another f-doubled laser. All the crystals probably look about the same to the people manufacturing the huge batches of 'em...

laser wavelength change?

Blade

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StardustSprinkles

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foulmist

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Atomicrox

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Blade

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G4nJ4M4n

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weeba2kv

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Things

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G4nJ4M4n

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weeba2kv

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Blade

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G4nJ4M4n

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BShanahan14rulz

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Blade

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BShanahan14rulz

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