Percieved brightness outdoors - 4W 445nm vs 1W 532nm

[Humphry]

Hi all.

I am contemplating purchasing a 5W CNI DPSS (so.expensive) :O
So I did the figures for a standard 4W knife edged 445 setup - it's much more affordable!

Could someone kindly tell me how bright and effective this is going to be for outdoors compared to:
1) 5w 532nm which is 5x the price
2) 1w 532nm which are my sats
3) And if I used 1W 532 and 4w 445 combined as a single lighter blue for the duration of the show, would this greatly help with visibility? My potential client is only concerned with brightness, nothing else.

Thanks in advance!

[edison]

1 watt green is almost 5x as bright as blue. So mixing it with a 5 watt blue makes a huge difference to increase the brightness of the projector compared to only blue. However the green will not be enough to get an almost white cyan. But i don,t think the customer cares about this. Also divergence is very important and without beamcorrection the divergence will be higher of that blue so less visible then when its corrected. A 3 watt blue with correction looks as bright as a 5 watt without.These days everyone thinks that when you have enough mw you are safe. Until the customer asks to do a logo. You do the logo and it looks crap and he never will hire you again. Its better to go 3- 4 watt blue and with beamcorrection and mix that with a 1 watt green. I don,t want to look like a salesman but just have a look here :

http://www.photonlexicon.com/forums/...ue-preojectors

Its prepared to drop in a green and the 3.2 watt has beamcorrection. Mix it with green and you have a shitload of brightness

[Humphry]

Thanks for your advice edison, you are allowed to be a bit of a salesman! In fact I am finding our more and more that getting gigs if you are new to the scene is all about composing shameless emails to organisers! :/

So lets say I pop in a 4watt prism pair corrected module with my 1W green and run them on white (and maybe TTL for max brightness) for the duration of the show.
Around what strength pure green would this be perceived as?

Thanks!

[edison]

I would say about 3 watt of green. But its also depends per person. Yes doing shows for the local townhall as a hobbyist is totally different then doing it as a company. I.m on the other end and i never did one show in my live. I only build systems and i look at things in a different way. I,m very picky when it comes to stability in allignment and divergence and i want the best of the best. I support people by having a couple of projectors on loan for free to help people out when they have a bigger gig and need more then 1 projector. When they can get money for that they can afford my modules and projectors later in time so its a win-win situation. The projectors are payed anyway so sharing them with my customers for now helps them to get them in the market.

[Humphry]

Your opinion is very much appreciated, regardless of your source of income. Thanks!

Let's hope someone with experience doing shows will offer their opinion...

[edison]

There are a few here that own high powered greens so they might can give you some extra info. Where are you from by the way?

[Humphry]

Cape Town, South Africa.

[mccarrot]

For outdoor use you have a much more visible beam with 2w of green compared to a 4w cyan (1w green +3w)

I recently added blue to all my projectors and i was amazed how little extra brightness it added. It did add nice colors offcourse, so for the costs its a nice addition. But for brightness, no

Blue only makes no sense at all outdoors unless you go +10w.

[planters]

I think there is some effect if the beam size is taken into account. Most of the multiple diode modules produce a relatively fat and less visible beam as the power goes up. If you want to push the combo beam approach ( nice and less common color) then if you are comfortable with replacing diodes, I would push the diodes in a 445nm much harder. If they are M diodes run them at say 1.9 A and expect over 4W out of a dual. This beam will be very tight and if modestly expanded will stay tight. Even if they last only a couple of hundred hours ( this is a conservative estimate) they cost only $40 each. If one was to fail during a show, then big deal... the color shifts a little and the brightness decreases, but you are not running a dual independent color projector so this effect will be relatively less important.

[edison]

In one of the blue projectors i have such a setup with the 9mm nicha diodes. They can be pushed well over 2 watt. I have it at 3 watt but it can be done. Mixing that with a 1 green woulld already give you a nice cyan. I mixed it with a 500mw one that was doing 700mw (viasho) and its amazing how fast brightness goed up.
Ok the more green the better versus the blue but that is also expencive.
I can fit in an OEM-H in one of those projectors if your interested in buying one. Just a suggestion not a way of trying to sell things here.

Ki