Laserwave 25mm dichros

**White-Light** · 10-12-2009, 16:34

Originally Posted by Laserman532

BULLSHIT!!! the manufacturer should MAKE them to operate at 45 degrees.

I don't think he was disputing that only pointing out that sometimes a steeper angle works better. I agree they should be designed to work at a 45° optimum angle though.

**Laserman532** · 10-12-2009, 17:43

yes my harshness was not poised at jem...it was poised at those manufactures. sorry jem if I implied you, I too am aware of the angle problem...thats why I want it SOLVED!!!

**Jem** · 10-12-2009, 18:40

Ahhh... You have such a delicate way with words Pat

No offence taken at all, and I know what you're getting at. I was merely pointing out (for those who weren't aware) that angle tuning can improve things somewhat

.

Interestingly, even the custom 'Semrock' dichro, which is supposedly a top notch piece of kit (and custom made for us), requires angle tuning to get the best out of it.

Once I get myself a new camera i'll post some pictures of my projector re-build that Rob (Stanwax) did for me. You'll see from the pictures that some strange angles are employed to get the best out of the dichro's.

Cheers

Jem

**mccarrot** · 10-13-2009, 00:26

Hi Marc,

Would you be so kind to test again with 45 degrees.

Myself in multiple projectors and many other people got way different results at 45 degrees!

**Doc** · 10-13-2009, 04:55

I'm loosing a crap load of red through the blue dichro.

**smogthemog** · 10-14-2009, 01:16

Just out of interest, what wavelength red?

I am about to use the LW 25mm's

**mccarrot** · 10-14-2009, 02:02

I think the Laserwave dichros got a good price/quality ratio and a nice mount.

But they are definitely not the best dichro's, if you are looking for high quality dichro's with low losses I would look further, I know I will for my next RGB build.

You can also read in Insanity's "monster" RGB tread how big the losses are.

For quality dichro's try:
Pritzler
Swislass
Kvant

But expect to pay more...

**sbk** · 10-14-2009, 02:28

Originally Posted by Doc

I'm loosing a crap load of red through the blue dichro.

Me too, I have at least 15% less red after that dichro

You can still try to limit the loss by turning a little the dichro, so it will make a more perpendicular angle to the incoming red beam.

**Doc** · 10-14-2009, 10:44

Originally Posted by smogthemog

Just out of interest, what wavelength red?

I am about to use the LW 25mm's

2x 800mW 650nm combined with a PBS

**mccarrot** · 10-19-2009, 01:13

Originally Posted by gottaluvlasers

i just did this rudimentary set-up:

now, i did not use a protractor to measure exactly 45 degrees. but its pretty damn near close.

-Marc

Hi Marc, did you had a chance to test at exactly 45 degrees?

As you can read in this post I have 15% loss of red trough the blue dichro.

http://www.photonlexicon.com/forums/...?t=9121&page=2

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