Chroma - a laser color blender

**tocket** · 08-24-2009, 18:26

Originally Posted by hobbybob

The speed is very ok! I really do love my 100/100Mbit fiber connection.
Thanks Tocket for this excellent and interesting piece of software.

Nice to see that people down on the continent can enjoy the high speed as well. Wish I had 100/100 myself, 50/10 (cable) is the best I can get.

Originally Posted by mccarrot

How thick is your 405 beam?, if its a normal 5mm beam it makes sense becouse it fatter than your other beams.

I have replaced my original aixis lenses with 5mm beam for special lenses with 1mm beam diameter and 0,8mrad and this made a huge improvement for my red and color mixing

I only made a temporary setup to test 405 and 532 nm mixing. You're right though, the beams didn't quite match. Especially since it was a low power green laser with a tight beam. Those are some very impressive specs for a direct injection laser though. Care to share what lens it is you're using?

Regardless, I have trouble focusing on a 405 nm beam alone as well, so I suspect the problem is in fact in the wavelength. Or rather, a combination of the nearsightedness I seem to have developed lately and the wavelength.

Originally Posted by cyberb0b

Is the beam diameter not an factor that's relevant to the color table?

It is relevant, yes. I chose not to include it and many other factors that also may or may not have an effect for the sake of simplicity. A perfect beam is assumed. In most cases that's close enough.

It is of course possible to calculate the impact of different beam geometries, distributions and alignments separately. Then enter the spectral power distribution for different positions in the beam in my application to get a more accurate color.

**mccarrot** · 08-24-2009, 18:39

The lenses are aspherical glass lenses available with broadband and red AR coating.

I have purchased them from Pritzler.

They are about 50 euro/pc

, but compared to the Rötner Lens27 it got better specs.

Lens27 got 1,5mRad

this lens 0,8mrad

and only 1% loss on the optics

and it comes with the complete diode mount.
the beam will be 1mm x 2mm so very good for stacking 2 beams on top of each other.

**-bart-** · 08-26-2009, 02:14

Could it be possible to add some more functionality to the calculated cumulative luminous flux ?
I can imagine that the term luminous flux is not that clear for many users.
You could add a functionality that that says:

This cumulative luminous flux of 7698 lm equals the brightness of a single [enter wavelength here]nm beam.

For many (starting) laserists who want to know how their rgb projector compares to a single 532 projector, this might be a valuable addition.

**tocket** · 08-26-2009, 13:54

That's pretty easy to add, but I can only compare luminance, not brightness. Two beams of equal luminance don't necessarily have the same brightness. It's a bit complicated. I can certainly imagine that people have trouble understanding these weird units and concepts. Even I do.

Do you think the user should be able to choose what wavelength to compare it against or should I simply set it to 532 nm?

**Doc** · 08-26-2009, 14:29

532 would make sense, but then again it would be useful to be able compare say 671nm with 445 or 405 for instance.

**-bart-** · 08-28-2009, 06:50

Comparing against 532nm would suffice for 90% of the time.

In a wider perspective, right now chroma is a tool for calculating theoretical ideal white balance. Not every bodies cup of tea.
If you add selectable wavelength comparison, it would widen its use to all kinds of chromatic laser issues.
If you want more people to discover the possibilities of chroma, adding this functionality might help it reach more laserists.

**cyberb0b** · 08-28-2009, 11:33

Real nice software.. Good job

..

**cfavreau** · 08-28-2009, 12:08

This software is really helpful! Now all I need is a power meter

BTW: I noticed that using the 660 + 532 + 405 (is really popular here) yields a not so great blue range (as others have very well pointed out). However if you add 488 and even just a little such a 1/10 the power of the 660 and 405 that you get a really nice blue coverage. I did see some 488nm solid state lasers for sale too. I used ~100 mW for the 660 ~150 mW and 532 ~25mW. Now if we can just find a 510nm laser that would be totally awesome.

**shrad** · 08-28-2009, 12:25

just get a small argon head, you'll have 515 and 488

**cfavreau** · 08-28-2009, 13:34

Yes that would appear to the best answer... however the size/weight/power and modulation requirements are going against the grain of the rest of the projector. A nice little omnichrome and a PCAOM would fit the bill... Direct modulated solid state would be better... although the price on those is high too.

Anyone out there already setup similar to this?

**laserpic** · 09-24-2009, 02:17

http://blue.orgchem.kth.se/Chroma/distrib/
don't open it. have anybody can test it.

**tocket** · 09-24-2009, 03:31

It's up again. This shit happens way too often with linux...

**White-Light** · 09-24-2009, 04:58

Originally Posted by laserpic

don't open it. have anybody can test it.

It's been sat on many of our computers for a long time and there are no reported viruses or spyware.

**Doc** · 09-24-2009, 10:53

It's installed on 2 of my home machines and on my work PC (with mega security) with no warnings.

Ian

**cfavreau** · 09-24-2009, 17:31

No problems here either... Program works well and does exactly what it is supposed to do...

**-bart-** · 09-25-2009, 04:07

Originally Posted by laserpic

http://blue.orgchem.kth.se/Chroma/distrib/
don't open it. have anybody can test it.

I'm not that sure he means we should not open it.

Laserpic could just as well mean:

Not able to open the link, could anybody check it.
It sounds very chinenglish to me.

**laserpic** · 09-25-2009, 12:15

Originally Posted by -bart-

I'm not that sure he means we should not open it.

Laserpic could just as well mean:

Not able to open the link, could anybody check it.
It sounds very chinenglish to me.

yes, my English is poor. but go with trend of chinenglish.

Thanks tocket for up it again.

**cyberb0b** · 10-01-2009, 17:57

Every good program needs an icon

so..

Sorry its in a rar.. but the board doesnt alow me to upload a icon file.

**Stoney3K** · 11-08-2009, 21:09

Originally Posted by -bart-

Not able to open the link, could anybody check it.
It sounds very chinenglish to me.

Same problem here, DNS is good but the server seems to be down.

Would love to give it a test run, but of course then I need the prog and the MCR from somewhere! Mirrors! Mirrors!

**Laserman532** · 11-09-2009, 01:26

it is probably just me but I cant get it to work.

Scenario one - 100mw 532 250mw 405 250 mw 642

Scenario two- 100mw532 250mw 405 125mw 642 125mw 660

Scenario three- 100mw 532 250mw 405 250mw642 250mw 660

which scenario is best?

**tocket** · 11-09-2009, 03:38

Originally Posted by Stoney3K

Same problem here, DNS is good but the server seems to be down.

Would love to give it a test run, but of course then I need the prog and the MCR from somewhere! Mirrors! Mirrors!

Sorry about that, it was time for updates again and I forgot to type in sudo httpd as usual. Mirrors seems a bit overkill, but I guess I could put it up at home as well.

**Doc** · 11-09-2009, 03:40

Figure 1 = scenario 1 etc

added scenario 4 - 100mW 532, 125mW 642, 500mW 405

**Laserman532** · 11-09-2009, 11:48

Thanks Doc. Appears I need to bump my green up to get use of my dual 642's and dual 405's if I am reading charts correctly.

DOH!!

**instinct** · 11-10-2009, 02:34

I had a problem with the program at first, but got it running smooth now! It's so fun to play with and imagine what kind of laser I could I have. My girlfriend could care less though.

**daedal** · 02-15-2010, 14:05

Is it just me, or does the MCR 7.9 not work on Vista 32/64 or W7 32/64?

--DDL

Thread: Chroma - a laser color blender

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Chroma & 488 nm

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