The '520 ColorWars' Thread... Where it all began..

[dsli_jon]

Hey Kats -

All-Purpose Thread for all things 520nm - results-wise - Better that 'Data threads' be kept pure-data.. Here, we wanna see: Color-shots / tests w/ varying Reds / Blues.. perhaps even 'incestually' other Greens ..A place for photos / videos / arguments / people bashing others about the post w/ 'Chroma-charts' / helpful software-pallete settings / tips / tricks / bits n bobs for klipping 'wings' / splash n' trash, etc... All-welcome..

...Pango-bashers / who-invented-the-Lens-first arguments / spammers / general-purpose douche-hatterers need not apply.. Have at it!

..OK, I'll start:

Saw it in real life for the first time today....The Yellow is less deep....

..Buut with what Red? Not sure why everyone that's 'worried' about the 520's 'color mixing' is forgetting the role the Red-plays... Will be keen to (also) see 520 + 635, 637, 640, 642, and 650-660.. Not to mention 520 + 473 vs 445... Anyone? Anyone? Bueller? ...will be good-data, if anyone's got the 'spread'..

ciao
j

[kecked]

445nm 520nm 638nm looks great to me. I don't see the yellow orange issue though it is a little different. To me it looks like ion laser color. No surprise to that since the green is GREEN like it use to be with argon hene/krypton lasers. I do think my red looks more orange but I'm not sure it's real and not just me. Over all given the drastic improvement in the image modulation I like it and will keep it. Now if I can just get 457nm for blue I'm back to where I started before dpss. I'll try my 642nm diodes again as well. I'M VERY HAPPY.

[masterpj]

From what I had seen with 638nm the red was a more sand white yellow tone of red.
Not even close to the deep yellow color with 532nm.
Brown~orange looked alright and the modulation was superb.

The red used I was 638nm. Gradients look slightly better though.

[White-Light]

What it really needs is someone with 520 and Beyond to apply colour correction via a custom colour profile and see if its possible to alter the yellow / oranges via the software. Setting a red point should avoid any difference with the red as mentioned by Kecked for sure. The other two are much more up in the air as is what happens to the other colours if yellow / orange are corrected.

[masterpj]

What it really needs is someone with 520 and Beyond to apply colour correction via a custom colour profile and see if its possible to alter the yellow / oranges via the software. Setting a red point should avoid any difference with the red as mentioned by Kecked for sure. The other two are much more up in the air as is what happens to the other colours if yellow / orange are corrected.

it's not a software issue.
perhaps the old dvd burned 650nm diode can offer some aid here but that's all really.

[White-Light]

it's not a software issue.
perhaps the old dvd burned 650nm diode can offer some aid here but that's all really.

I think you misunderstood PJ. I know its not a software issue but Beyond's colour profiling allows you to compensate. eg I could set the Green to display Pink and whenever green appeared in a cue it would appear pink. Likewise in a less extreme scenario, if its possible to get a deeper yellow or less browny orange by mixing the colours proportions differently to what Beyond normally does to compensate for the different wavelength, then its possible to set those new colours as yellow / orange and Beyond will display those shades instead of what you get by default, if that makes sense.

To give you an idea, I already have the yellow and orange set to a different shade in Beyond anyway with 532 as I wasn't satisfied by the default colour.

[MIIKKKLLLL]

it's not a software issue.
perhaps the old dvd burned 650nm diode can offer some aid here but that's all really.

Unfortunately this doesn't work like that . You need to choose closer primary colors to obtain a better mixed color.

I think you misunderstood PJ. I know its not a software issue but Beyond's colour profiling allows you to compensate. eg I could set the Green to display Pink and whenever green appeared in a cue it would appear pink. Likewise in a less extreme scenario, if its possible to get a deeper yellow or less browny orange by mixing the colours proportions differently to what Beyond normally does to compensate for the different wavelength, then its possible to set those new colours as yellow / orange and Beyond will display those shades instead of what you get by default, if that makes sense.

To give you an idea, I already have the yellow and orange set to a different shade in Beyond anyway with 532 as I wasn't satisfied by the default colour.

With the example you gave (with a green @t 532nm), it is possible to correct the proportion of red and green
(take a look here : http://www.photonlexicon.com/forums/...807#post282807)
because the color you are looking for exists, and is situated on the straight line connecting the 2 primary colors

The same tint with a green primary color @t 520nm is simply impossible to obtain.

[kecked]

I will be doing this today. I just rewired my projector and with the dpss out it is eerily quiet. I took a lot of optics out and made the whole thing more streamlined. Going to try an achromat based spatial filter on the final combined output and see what I get. If I can't get that yellow ....oh well. I'm happy with what I see. I for one will trade the modulation issues for the color issue any day.

[White-Light]

The same tint with a green primary color @t 520nm is simply impossible to obtain.

Yeah I realise you're never going to get the same tint, but I was hoping it may be possible to get a better tint by shifting the mix slightly.

Just lo0oking at the colour graphs, what we really needs is a 550nm green (which would also give use that fluo green colour by the looks of it.) Now if we had 550nm and 520nm diodes.....

[Vidal Wolf]

Is there an optical mfgr that can make a pass 532 and reflect 520 dichro? Edmunds? CVI? II-V? Melles Griot? *that* would be a game changer.
Same for the reds.