487 nm. Laser possible ?

[Heirophant]

I was sitting 'round thinking ... What if I could combine the spectral photonic brilliance of 532 green and 'heavenly'-blue 445 lasers ... one would end up with 487 nano-meters of Laser ...

Is this possible ?

Can someone engineer/build me a hand-held with at least 1-watt of this ?

Please advise.
I am a relative ' newbie ' to lasers but catching on fast and ready to change the game ...

:evil:

 

[Trevor]

You would be seeing green and blue being cyan, but you would not have a 487nm laser.

Like red, green, and blue combining for white.

-Trevor

 

[Heirophant]

well if i wouldnt have 487 nm what would I have ?

 

[brando132]

532 and 445.

 

[Heirophant]

no it would be 487

 

[Prototype]

You can't create wavelengths like that. Your eyes will see the tealish color of 445 and 532 being combined, but it wouldn't be 487nm.

 

[brando132]

You can't combine laser light. What will be happening is the 532 will be stimulating the green (rods?) of your eye, and the 445 wil be stimulating the blue (rods?), which will trick your brain into seeing somewhere in between. You will NOT have a laser of 487nm, you will have two separate lasers at 532 and 445.

**EDIT** Beaten again...

 

[Trevor]

no it would be 487

c'mon laser geeks, help me here...

To make this facepalmingly obvious for you, please find the white portion on the visible spectrum graph.

Then pick a red, green, and blue wavelength to use to create it. Average them like you did to figure out that 445 + 532 = 487. Now find your new wavelength on this chart. Surprise, it'll be somewhere in the green to yellow range. Green to yellow is not white.

Lasers are not additive.

-Trevor

 

[qumefox]

Closest you'll get to 487nm is the 488nm argon line, but your not going to fit an argon-ion laser in a pointer. They're available in multiple watt as well and with multiline optics you can get, at least in the visible spectrum, from violet to green from them but.. the multi watt argons are going to demand water cooling and three phase power.

There are DPSS 488nm lasers around too but again, not going to end up as anything very portable.

and as others said. Laser light doesn't combine. 532 + 445 = 532 and 445.. Your brain might think they changed wavelength, but if you looked at the dot with a spectrometer, you'd see a 532nm line and a 445 line. If you ran it through a prism, it would separate back out into a 532nm line and a 445nm line as well.


I disagree with Trevor though. Lasers are very addictive.

 

[Weltall]

This may be a little off-topic but why is that of all primary and secondary colors, is magenta the only one that doesnt have a wavelenght?

It kinda seems like nature (or God if u believe in him :na made a mistake and forgot to give that color its own wavelenght

And actually how is we can see violet?, if human vision is trichromatic, i have understood that our eyes mix Red, Green and Blue to see all others colors right?, that also goes for all rainbow colors but violet :undecided:

I mean if u mix red and blue gives purple but that is for pigments, if mix blue light and red light u get magenta, not violet, so what's the "combination" that makes our eyes to perceive violet light? :can:

Im probably missing something but cant figure it out ATM :scared:

 

[Pontiacg5]

There is a difference between printing primary colors and actual primary colors.

 

[Xplorer877]

You can't make 487nm like that.

But you can make 485nm! All you need to do is tape two 445nm laser together so you get 890nm, then simply add on a 405nm laser (pointing the other way) so it subtracts form the overall wavelength, and wala! 485nm!

Or you can microwave green laser diodes and that will shorten their wavelength. Every minute in the microwave will shorten its wavelength by about 20nm or so.

-Tony

 

[Trevor]

You can't make 487nm like that.

But you can make 485nm! All you need to do is tape two 445nm laser together so you get 890nm, then simply add on a 405nm laser (pointing the other way) so it subtracts form the overall wavelength, and wala! 485nm!

Or you can microwave green laser diodes and that will shorten their wavelength. Every minute in the microwave will shorten its wavelength by about 20nm or so.

-Tony

I'm pretty sure that's going to be the highlight of my day. And it's only 1:39.

You, sir, win.

-Trevor

 

[Grix]

There are diodes lasing at 487nm.

 

[Things]

There are diodes for almost any wavelength. Their availability and price is another story

 

[Eudaimonium]

This may be a little off-topic but why is that of all primary and secondary colors, is magenta the only one that doesnt have a wavelenght?

It kinda seems like nature (or God if u believe in him :na made a mistake and forgot to give that color its own wavelenght

And actually how is we can see violet?, if human vision is trichromatic, i have understood that our eyes mix Red, Green and Blue to see all others colors right?, that also goes for all rainbow colors but violet :undecided:

I mean if u mix red and blue gives purple but that is for pigments, if mix blue light and red light u get magenta, not violet, so what's the "combination" that makes our eyes to perceive violet light? :can:

Im probably missing something but cant figure it out ATM :scared:

Human's vision is trichromatic yes, but it's not Red Green Blue.

It's actually Red Green Violet , and "blue" is what you get between violet and green. Take powerful 405nm laser and middle-range-power green pointer and point them at the same dot. You can see how they mix into some sort of bluish color.

It's also same situation with yellow. It's between red and green, same as blue is between green and violet.