Page 1 of 4 1234 LastLast
Results 1 to 10 of 36

Thread: Laserwave 25mm dichros

  1. #1
    Join Date
    Dec 2006
    Location
    Pflugerville, TX, USA
    Posts
    1,977

    Default Laserwave 25mm dichros

    I received my laserwave 25mm dichros today. I will be comparing them to my Edmund Optic dichros so stay tuned to this thread. The first that I noticed is that they are at least 1/2 as thick as the Edmund dichros. I am wondering if I will have any problems in the mounts. I will let you know.

  2. #2
    Join Date
    Jan 2006
    Location
    Charleston, SC
    Posts
    2,147,489,073

    Cool

    Hmmm... I would think that thinner would equal less losses on the transmission side. Very interested in your results though.

    For what it's worth, those custom dichros I'm ordering from Semrock (the narrow-band ones that reflect 635 and pass 660) will only be ~ 2 mm thick, according to the engineer I spoke with. That's *really* thin compared to the thick honkin' dichros I have from Edmunds... So maybe there's something to the idea of a thin dichro.?.

    Adam

  3. #3
    Join Date
    Jul 2008
    Location
    Eugene Oregon
    Posts
    952

    Default

    sweet i may be interested in some of these later down the road. please let us know
    -Josh

  4. #4
    Join Date
    Apr 2008
    Location
    Amsterdam, NL
    Posts
    2,098

    Default

    Did you finished the test?

    With my laserwave dichro's have about 10% loss on pass trough, so thats pretty bad.

    I think its because of the bad (chinese) AR coating used.

  5. #5
    Join Date
    Oct 2006
    Location
    Central Florida
    Posts
    7,067

    Post

    You may want to check Gary's posting stats... it has been a while since he has visted the forum. Gary is good people but that clue-by-four can be hard to shake off...
    Love, peace, and grease,

    allthat... aka: aaron@pangolin

  6. #6
    Join Date
    Jan 2009
    Posts
    1,622

    Default

    I've never seen dichros with less than 10% loss on pass through. Where would one purchase some?

  7. #7
    Join Date
    Jan 2007
    Location
    Yorkshire, UK
    Posts
    4,585

    Default

    Are you guys using them at exactly 45 degrees?, if so, that could possible be your problem. You may be able to acheive better results if you angle tune them.

    Cheers

    Jem
    Quote: "There is a theory which states that if ever, for any reason, anyone discovers what exactly the Universe is for and why it is here it will instantly disappear and be replaced by something even more bizarre and inexplicable. There is another that states that this has already happened.... Douglas Adams 1952 - 2001

  8. #8
    Join Date
    Apr 2008
    Location
    Amsterdam, NL
    Posts
    2,098

    Default

    Yes, I have only tested it with 45 degrees. But in most cases 45 degrees is the only option.

    Here in Europe we can get dichro's with 3% pass trough, but they will be a little bit more expensive.

    I think the cause is bad Chinese AR coating.

    On my PBS from laserwave I also have 10% loss on pass trough and 4% on refelect.

  9. #9
    Join Date
    Jul 2006
    Location
    Connecticut, USA
    Posts
    2,478

    Default

    i just did this rudimentary set-up:

    Without dichros, beam only.
    Click image for larger version. 

Name:	dichros 006_1.jpg 
Views:	275 
Size:	167.9 KB 
ID:	9841

    Click image for larger version. 

Name:	dichros 007_1.jpg 
Views:	274 
Size:	169.4 KB 
ID:	9842

    45 degree pass through (Reflect RED dichro, pass B/G):

    Click image for larger version. 

Name:	dichros 003_1.jpg 
Views:	275 
Size:	169.7 KB 
ID:	9843

    Click image for larger version. 

Name:	dichros 004_1.jpg 
Views:	272 
Size:	189.6 KB 
ID:	9844

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

    -Marc
    http://www.laserist.org/images/ildalogos/ILDA-logo_colored-beams_Corporate_150w.jpg

    ILDA- U.S. Laser Regulatory Committee

    Authorized Dealer for:

    • Pangolin Laser Software and Hardware
    • KVANT Laser Modules & Laser Systems
    • X-Laser USA
    • CNI Lasers
    • Cambridge Technology & Eye Magic Professional Scanning Systems

    FDA/CDRH Certified Professional LuminanceRGB Laser Light Show Systems


  10. #10
    Join Date
    Nov 2007
    Location
    Bend Oregon USA
    Posts
    3,349

    Default

    Quote Originally Posted by Jem View Post
    Are you guys using them at exactly 45 degrees?, if so, that could possible be your problem. You may be able to acheive better results if you angle tune them.

    Cheers

    Jem

    BULLSHIT!!! the manufacturer should MAKE them to operate at 45 degrees.
    Pat B on alt.lasers


    Visit My Site

    laserman532 on ebay
    laserman532 on LPF

    Been there, done that, got the t-shirt & selling it in a garage sale.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •