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Any1 successfully combine 405nm with 532nm?

blrock

blrock

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I believe combinding 405nm with some 532nm can give you some nice blue. Now that 405nm is rather affordable has anyone attemped this with positive results?
Do you need a dicrotic mirror to combined them? Or could you use a prism beam splitter?

UPDATE:

I held my 15mw greenie and 150mw violet as close together as possile with some of the green beam going down the violet beam....the beam is blue! So is the spot of the wall with the two lasers mix..

So the back to my orginal question.. what optics are need to mix the two beams.

Definitely the cheapest blue laser to make :) :)
 
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Flaminpyro

Flaminpyro

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405+532

Sounds like something I should try right now ! :yh: think I'll give it a try, :pop:stand by...

Pyro...:eg:
 
millirad

millirad

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That's going to be interesting to see a beam shot of. The wavelengths won't focus to the same spots, but if it is tight enough for about 30 feet, it would look quite good assuming it is multiline blue.
 
T

The_Muffin_Man

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I have done it. Mine produces a more cyan. Its still really nice. I might have a beamshot . It is closer to 532. I was using a 120mW violet and a 50mW green. It would might work with a 4:1 v:g. It wouldn't be TRUE blue though. You can use the dichro from the phr sled or the cube.
 
thesk8nmidget

thesk8nmidget

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i have also done it in my projector...

check out an old video and you need to use a dichro to combine the colors. i have a couple if you are interested

towards the end there are good shots
YouTube - 405nm and 532nm mixed scanner


EDIT:

looks like someone already posted my video lol
 
thesk8nmidget

thesk8nmidget

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heres some pictures

DSCF7718.jpg


DSCF7729.jpg


DSCF7700.jpg


DSCF7702.jpg

more green
DSCF7703.jpg


DSCF7705.jpg

a little wave fading
DSCF7713.jpg


DSCF7719.jpg
 
E

ElektroFreak

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It's interesting that this topic popped up, as I was just contemplating this last night. If the output of the green and blu-ray lasers was properly adjusted and the beams were perfectly superimposed both near- and far-field it should be possible to get a very nice sky blue.

The reason I've been thinking about this is that all my 473nm lasers suffer from the so-called "blue problem". Normal 473nm DPSS lasers produce a "noisy" output with power fluctuations at a high rate of speed (into the kHz range) of as much as 30%. The fluctuations are generated in the doubling crystal and are a side effect of the doubling process in LBO. This manifests itself as a slight flicker in the output. 473nm lasers that utilize special cavity configurations (ring, z-fold, etc.) produce a much more stable output, but they are much, much more expensive than the already expensive standard 473nm configuration.

When used in an RGB system these fluctuations are barely noticeable (if at all), but being the anal-retentive laserist that I am I notice them, and I know that there could be better, more stable, sources of a sky-blue hue than the standard DPSS route. Combining a 532nm DPSS (which will be far more stable than 473nm DPSS) with a 405nm diode (which is extremely stable) could be a way to make a blue system for much less money than nearly any 473nm DPSS system. Beam alignment and shaping would be crucial, however, if a clean blue beam is to be produced rather than a beam that is more green (or blue) on one side than the other.

Right now it's just food for thought for me. I'll be giving it a try quite soon and if some form of analog modulation can be achieved for both lasers simultaneously, I'll be using this type of blue source in an upcoming RGB project.
 
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thesk8nmidget

thesk8nmidget

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ElektroFreak said:
It's interesting that this topic popped up, as I was just contemplating this last night. If the output of the green and blu-ray lasers was properly adjusted and the beams were perfectly superimposed both near- and far-field it should be possible to get a very nice sky blue.

The reason I've been thinking about this is that all my 473nm lasers suffer from the so-called "blue problem". Normal 473nm DPSS lasers produce a "noisy" output with power fluctuations at a high rate of speed (into the kHz range) of as much as 30%. The fluctuations are generated in the doubling crystal and are a side effect of the doubling process in LBO. This manifests itself as a slight flicker in the output. 473nm lasers that utilize special cavity configurations (ring, z-fold, etc.) produce a much more stable output, but they are much, much more expensive than the already expensive standard 473nm configuration.

When used in an RGB system these fluctuations are barely noticeable (if at all), but being the anal-retentive laserist that I am I notice them, and I know that there could be better, more stable, sources of a sky-blue hue than the standard DPSS route. Combining a 532nm DPSS (which will be far more stable than 473nm DPSS) with a 405nm diode (which is extremely stable) could be a way to make a blue system for much less money than nearly any 473nm DPSS system. Beam alignment and shaping would be crucial, however, if a clean blue beam is to be produced rather than a beam that is more green (or blue) on one side than the other.

Right now it's just food for thought for me. I'll be giving it a try quite soon and if some form of analog modulation can be achieved for both lasers simultaneously, I'll be using this type of blue source in an upcoming RGB project.
Click to expand...

what about adding 405nm to your RGB to make it a RGBV laser? laser wave made a custom dichro just for this, i have 3 if you are interested, and i have no use for them if your interested in one for trade or sale?

it may help hide your 473 jitters.

pm me if you want anymore info on them.

what power is your 473nm?
 
E

ElektroFreak

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Not a bad idea to add 405. I was considering adding 405nm starburst grating effects and a laser sky to my projector setup externally on each side of the main projector, but adding 405nm to the RGB itself never occurred to me. PM sent.

Regarding the jitters, the laser in my RGB is a 50mW CNI unit that's pretty new (probably not more than 50-100 hours). The fluctuations are barely noticeable even to me so it's not a huge problem, but it's there nonetheless. I used to have a 10mW blue CNI pointer that did the same thing, and at the time I did a little research and it turned out that it is common in blue DPSS lasers.
 
BrewCityMusic

BrewCityMusic

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I swapped out the reds in a pair of RGY stepper-type displays way back before the 6X was available, the 803t's were running at just over 110mW and to get the most consistant blue mixes I ended up turning the greens down to just over threshold (30mW) - here's a pic:

gbv_01.jpg


so the 4:1 ratio is probably just about right, IMHO
 
jayrob

jayrob

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blrock said:
I believe combinding 405nm with some 532nm can give you some nice blue. Now that 405nm is rather affordable has anyone attemped this with positive results?
Do you need a dicrotic mirror to combined them? Or could you use a prism beam splitter?

UPDATE:

I held my 15mw greenie and 150mw violet as close together as possile with some of the green beam going down the violet beam....the beam is blue! So is the spot of the wall with the two lasers mix..

So the back to my orginal question.. what optics are need to mix the two beams.

Definitely the cheapest blue laser to make :) :)
Click to expand...

This is one of the combination's that you get in the 7 color build from rog8811. We are calling it 'turquoise'. My camera does not capture it well. But I do have some beam shot comparisons. In person, it is very 'blue-green'...
My 7 Color Laser In Clear Enclosure... - Laser Pointer Forums - Discuss Lasers & Laser Pointers
Jay
 
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