556 vs 561, visible difference?

[Laserboy]

Hello laserists! I am about to purchase a 556 or 561 nM laser module, but I can't decide which one. Anyone who has seen both of these wavelengths IRL? Is there a (significantly) visible difference in colour? Or are they pretty similar?

Cheers,
Filip

[dnar]

I have not seen either wavelength LD yet but theoretically 556nm will appear brighter. Not much difference between the two as they are so close.

Keen to hear opinions.

[norty303]

Those are fairly unusual wavelengths. Care to share which manufacturer and technology? I can find Coherent OPSL for 561nm, but not 556

[edison]

http://www.cnilaser.com/green_laser556.htm

[DrEvil]

Someone had both at SELEM 2011. You can see a slight color difference. You might want to ask over at LPF. There are a few that collect as many different wavelengths as possible.