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Difference between polarized and non-polarized beam splitters

Alaskan

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VisibleGreen

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Well from my understanding if you want to combine two beams together you need polorized. The cube is really for splitting a polarized beam into two but it also works in reverse and is what you are trying to do.
 
Alaskan

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OK thanks, then I need to find one which is either broadband coated or allows me to combine 450nm and 520nm together into one beam, but the thing needs to be about 12.7 to 15mm on a side square and be able to take 6 watts of blue and 1.5 watts of green. I've been searching ebay, found a couple, but don't know if that size of cube can take that much power.
 
VisibleGreen

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Why not just use a dichro to combine the two colors?

A pbs cube won't transmit as much of the light as a dichro will. Less resistance less heat I would think.
Not sure either about what size you would need for 5 watts but you can ask the seller for the maximum power it can handle.
 
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Alaskan

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OK, maybe I should do that, I guess a dicro will allow beams to overlap just as well, good idea.
 
Alaskan

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I'm starting to think I might as well do a R,G,B but finding a high power red laser diode to balance out with the blue at 6 watts just isn't going to happen, there are no 6 watt red diodes out there yet.

Edit: Came back to add a statement, maybe I don't need so much red or blue power to mix with 1.2 watts of green to make white? Perhaps I will have far too much 450nm at 5-6 watts mixed with that power of green. I will google this and see what the typical powers are for each wavelength to make white. I was just basing this on how sensitive our eyes are to red and blue compared to green, which is only 10% as sensitive to the low and high ends of the visible color spectrum, but that might not apply when mixing r,g,b.
 
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VisibleGreen

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Alaskan said:
I'm starting to think I might as well do a R,G,B but finding a high power red laser diode to balance out with the blue at 6 watts just isn't going to happen, there are no 6 watt red diodes out there yet.

Edit: Came back to add a statement, maybe I don't need so much red or blue power to mix with 1.2 watts of green to make white? Perhaps I will have far too much 450nm at 5-6 watts mixed with that power of green. I will google this and see what the typical powers are for each wavelength to make white. I was just basing this on how sensitive our eyes are to red and blue compared to green, which is only 10% as sensitive to the low and high ends of the visible color spectrum, but that might not apply when mixing r,g,b.
Click to expand...

I have a 5w 660nm cmount diode I bought awhile ago. Never been used. I suppose I could sell it to you but it's not cheap. I'd want 400 for it :yabbem:
 
Alaskan

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Ha, I'm out of play money for awhile. I work in the oil field industry and all of the overtime I used to do has gone away with the price of oil, but thanks for the offer. I can't afford large expenses on this project. I do have a 900mw 638nm pointer, maybe I should just take the diode out of it and use for this project.

Edit: I wasn't aware there was such a higher power red laser diode, who made it?
 
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VisibleGreen

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Alaskan said:
Ha, I'm out of play money for awhile. I work in the oil field industry and all of the overtime I used to do has gone away with the price of oil, but thanks for the offer. I can't afford large expenses on this project. I do have a 900mw 638nm pointer, maybe I should just take the diode out of it and use for this project.

Edit: I wasn't aware there was such a higher power red laser diode, who made it?
Click to expand...

I understand. Um not sure who made it. They were available a few years ago and then the stock all dried up and no one had them. It's got a fac lens on it so all you need is a focusing lens. I'll try to find you a few threads about it here on lpf.
 
Isaac Clarke

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i think that's normal for us laserist, we may have a bunch of diodes lying around, too many host that we never use we simply just grab it without second thought Ehgemus work his magic on the aluminium bar stock.
 
VisibleGreen

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FUBeaches said:
i think that's normal for us laserist, we may have a bunch of diodes lying around, too many host that we never use we simply just grab it without second thought Ehgemus work his magic on the aluminium bar stock.
Click to expand...

With this particular diode I wanted to use a copper heatsink and a special driver made by lazeerer. He told me that this diode is picky at start up so it needs a more sophisticated slow start sequence.
I got a host for it but just never got the heatsink and driver made.
I priced it pretty high for me right now so I just put it aside but now that I thought about it I could use the money.

It pains me to even think of selling it as I would love to see 4w of corrected 660nm light
 
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