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Chinese laser pointer question.




paul1598419

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Yeah, that's my sentiment too. Looks very much like many cheap 532nm pointers for sale on sites and on eBay. I have some of those same star caps that came with other 532nm laser pointers. They all still use a 500 mW pump diode and measure 80 mW at best.
 

Lagomorpha

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Well, at least it comes with a "colorful box"! ;)
HAHAHA! Yeah. Mine doesn't even come with the ever-so exciting colorful box. Just the lame laser in all its glory. . .
Gotta be more powerful than a 301, right?

EDIT: Also!

I was also wondering if when I get it/them If I could potentially send it to someone who has an LPM to check the power, and they send it back to me after they measure the power?
If not, it's totally cool, but still a suggestion/question. Thanks everyone for your time!
 
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Lagomorpha

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I'm in western Washington, so not that far from you. I can measure power and wavelength as long as you pay the shipping.
AWESOME! Thanks a bunch bud! I am probably down to do that after I receive 1. The lasers and 2. The money.
I really appreciate your help. I don't often have cash, but if I come across more again or if I am finally approved for SSI(my hearing is in January)
I am really glad someone is down to do that, that quickly after I posted it. Thanks again!
 
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paul1598419

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Thanks, guys. It is of note that though the main line for these Nd:YVO4/KTP lasers is 532.14nm, it isn't the only possible line. Among the other possible lines are 538nm, 543nm and 546nm. I have two lasers doing multiple lines. One has four and the other one has six!
 

Snecho

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Thanks, guys. It is of note that though the main line for these Nd:YVO4/KTP lasers is 532.14nm, it isn't the only possible line. Among the other possible lines are 538nm, 543nm and 546nm. I have two lasers doing multiple lines. One has four and the other one has six!
Wait, 532 DPSS have multiple lines? o_O
 

paul1598419

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They can have multiple lines. They may also lase at another line besides 532nm. That was my only point.
 

Lagomorpha

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Thanks, guys. It is of note that though the main line for these Nd:YVO4/KTP lasers is 532.14nm, it isn't the only possible line. Among the other possible lines are 538nm, 543nm and 546nm. I have two lasers doing multiple lines. One has four and the other one has six!
Interesting. What exactly do you mean, multiple lines?
 

paul1598419

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Lines are just wavelengths. You should get a diffraction grating so you can see how they work. You can get one for as little as a dollar on eBay. One of my multi-line 532nm lasers shown through a grating splits the wavelengths into individual spots that you can see and count. The spectrometers we use have mirrored or holographic gratings in them that are collimated and spread across a CCD or CMOS detector that can then give you a spectrum output that shows the wavelength and relative intensity of all the lines in that particular shot. On the cheaper 532nm pointers it is possible to find a multi-line output, but you can only see that with a grating or spectrometer. I have a sheet of 1 um line width or 1000 lines/mm. I got it years ago before I bought my spectrometer. Can't remember what I paid for it, but it was ~12 inches by 18 inches. I have sent many sheets out to people here so it is smaller now.
 

Snecho

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Lines are just wavelengths. You should get a diffraction grating so you can see how they work. You can get one for as little as a dollar on eBay. One of my multi-line 532nm lasers shown through a grating splits the wavelengths into individual spots that you can see and count. The spectrometers we use have mirrored or holographic gratings in them that are collimated and spread across a CCD or CMOS detector that can then give you a spectrum output that shows the wavelength and relative intensity of all the lines in that particular shot. On the cheaper 532nm pointers it is possible to find a multi-line output, but you can only see that with a grating or spectrometer. I have a sheet of 1 um line width or 1000 lines/mm. I got it years ago before I bought my spectrometer. Can't remember what I paid for it, but it was ~12 inches by 18 inches. I have sent many sheets out to people here so it is smaller now.
Would star cap gratings also show the presence of multiple 532 lines?
 

paul1598419

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No. They are two diffraction gratings that are rotated against each other to get that effect. You need a single line grating. My preference is 1000 lines/mm. There are also many different types of gratings depending on the effect you want to get. Star caps are useless IMO.
 

Snecho

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No. They are two diffraction gratings that are rotated against each other to get that effect. You need a single line grating. My preference is 1000 lines/mm. There are also many different types of gratings depending on the effect you want to get. Star caps are useless IMO.
Thanks Paul. What do the lines/mm dictate? What would be the use cases?
 




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