400mw 640 vs 1W 650?

[norty303]

Ok, so as the title says, which is better/brighter?

640nm @ 400mW
650nm @ 1000mW

Chroma has the 650 ahead on luminous flux, but I'm hearing conflicting stories about how they look in real life.

Even better, anyone got any pics of similar ratios of 640/650 they can post?

Thanks

[allthatwhichis]

Even better, anyone got any pics of similar ratios of 640/650 they can post?

Dammit man!!! I clicked on this thinking you were doing the comparisson and had the pics already...

[daedal]

Ok, so as the title says, which is better/brighter?

640nm @ 400mW
650nm @ 1000mW

Chroma has the 650 ahead on luminous flux, but I'm hearing conflicting stories about how they look in real life.

Even better, anyone got any pics of similar ratios of 640/650 they can post?

Thanks

Well... as you mentioned, our own fantastic Chroma tool shows the following
1W 650 @ 73.081 lm
0.4W 640 @ 47.81 lm

Although, is this going to be a purchased 650? or a DIY 658?

I have a 200mW 640 and a 500mW 658 that I can compare... if interested...

--DDL

P.S. 1W of 658nm = 46.9681lm

[norty303]

Looking at your signature pic, you've got 300mw of 532 and 640. How do they balance up?

The reason I'm asking is I have a RGY with ~400mW 532 and 1.1W of 650. I'm looking to build a partner projector using 400-500mW of 532 and wondered whether to go with ~900mW of 650 or ~400mW of 640

Although, is this going to be a purchased 650? or a DIY 658?

This'll be a Laserwave module, although I'm aware they're not doing more than 350mW of 640 at the moment (it'll probably still be knocking on 400mW I'd expect)
The 1.1w is a LW module I got off Marc

[mccarrot]

Ok, so as the title says, which is better/brighter?

640nm @ 400mW
650nm @ 1000mW

Chroma has the 650 ahead on luminous flux, but I'm hearing conflicting stories about how they look in real life.

Even better, anyone got any pics of similar ratios of 640/650 they can post?

Thanks

640nm period.

the 650nm is most probbably a flashlight with a ver fat beam. this fat beam will most probbably spill over your galvo mirrors causing allot of power loss.
It also got a high divrigence an will be very dim after a few meters and will not reach to the end of the venue like a laser with a small divirgence.


here are some specs of a high quality lasermodule I resell: (no Chinese crap)


- Diodelaser
- 642nm +/- 3nm
- >650mW
- <2,6mmx2,6mm diameter of beam
- <0,7 mrad beam spread angle
- analog modulation 0-5V 0-100kHz
- 75mmx48mmx45mm!!!!!!!

Arctos got a nice article on there website explaining why divrigence is so important:

http://www.arctoslaser.de/en/arctos_arguments.htm

[Francesco]

640nm period.

Arctos got a nice article on there website explaining why divrigence is so important:

http://www.arctoslaser.de/en/arctos_arguments.htm

Hmmz, just noticed that the info on the OPS laser from Coherent is not "correct". Probably this data is from a not collimated version.
Not really fair in this way, the OPS laser has a divergence of <1.5mrad with standard collimator (Diameter <1.0mm).
So I would say a OPS red has more brightnes than the arctos 640nm diode combinement.
But a lot more expensiver

Here a link to a video where I did the control of the lasers. The setup was 2x 5W green OPS and 1x 1.5W Red OPS.
Because the red OPS has a very small diameter and divergence it has a quite good visability together with the higher powered greens.
Sure the greens where a lot brighter but I was supprised myself
http://www.youtube.com/watch?v=2lRVBZA5r0I
http://www.youtube.com/watch?v=zGk2GCPxPNo

Ontropic:
I would go for the 640nm laser. Lower power but probably around the same visability = more safety
Keep in your mind that the 650nm is probably a flashlight beam so after some distance not that usefull...

[edison]

Thanks for the info Francesco but i,m guessing that no one can afford those. So lets stick to the lasers that we can afford.

[Carl B]

Hey Guys

I've just bought a laserwave 650nm 350mW head from Rob Stanwax doing 415mw with tight beam specs just like the 640's.
In RGB No.1, my 640 is a 150mW spec head doing just over 200mW. This is then cubed with a 250mw 671nm red dpss head. (I am losing about 40% of the 671 through the cube. )

I've not had chance to compare but I'm quite confident that the 650 with in RGB No.2 will look just fine against the 640 + 671 red.

Carl

[Doc]

I can't really comment on the smaller 640, but the centre projector in this video is outputting 1.1W of (Laserwave) 650 red after the lossy cube with 1W of 532.

I would hardly call it a flashlight.

PS turn down the sound, the audio is blown to pieces!

http://www.youtube.com/watch?v=RkYErDPStkU

[mccarrot]

@ Doc

I think the 532nm in that projector is also higher than 1,5mRad, because non of the beams reach to the end of the room with equal brightness.

Look at this picture I made, this RGB block got less than 1mRad so the lasers penetrate furter into the room