Page 3 of 3 FirstFirst 123
Results 21 to 30 of 30

Thread: four to one?

  1. #21
    Join Date
    Jan 2006
    Location
    Charleston, SC
    Posts
    2,147,489,446

    Smile

    Plus or minus a few degrees is close enough. If you're off by much more than, say, plus or minus 5 degrees, you'll see the power drop off, but the loss should be linear. At 45 degrees, your power loss will be close to 50%, and if you're exactly 90 degrees off, your power output should be zero, or very close to it.

    Adam

  2. #22
    Join Date
    Aug 2007
    Location
    Netherlands
    Posts
    417

    Default

    You're the man! Thanks again. I'll explain my idea/concept by posting the renders later today.

  3. #23
    Join Date
    May 2007
    Location
    Milwaukee WI
    Posts
    1,355

    Default

    Joroen,

    Just to expand Dichros do combine based on wavelength and like mentioned above PBS cubes rely upon polarization. But PBS cubes also have a particular wavelength that they work best at.

    -Max

  4. #24
    Join Date
    Nov 2005
    Location
    Melbourne, Australia
    Posts
    3,702

    Default

    Quote Originally Posted by JeroenVDV View Post
    Just a new question without starting a new topic..

    I have one 1W Viasho laser, and there will be a second one in some time. I would like to try to combine the 2 beams to create a 2W green source. Is this possible? Can someone do me a children-style-explanation of PBS-cubes and other toys?
    if what the specs say, you should have no problem,

    however we had a customer who bought 4 1.5w's with the intention of combining them in to 2 3w's with PBS cubes. He tried and then said the lasers seem to be randomly polarized at best... He ended up stacking the beams side by side to combine them....

    I would be interested to see whether you have more luck
    KVANT Australian projector sales
    https://www.facebook.com/kvantaus/

    Lasershowparts- Laser Parts at great prices
    https://www.facebook.com/lasershowparts/

  5. #25
    Join Date
    May 2007
    Location
    Milwaukee WI
    Posts
    1,355

    Default

    Jeroen,

    If you already have the lasers you could take a PBS cube and see how much you lose at certain degrees.

    -Max

  6. #26
    Join Date
    Aug 2007
    Location
    Netherlands
    Posts
    417

    Default

    Dave and Max,

    Thanks for the message. I don't have the second Viasho at the moment, and I don't have a PBS cube yet.

    Maybe Frank can confirm whether or not the 1W models are random polarized or not.

  7. #27
    Join Date
    May 2007
    Location
    Milwaukee WI
    Posts
    1,355

    Default

    I am willing to bet they are spec'd at 1:100 polarization ratio - whether or not that is the truth. Like Dave mentioned, sometimes they are spec'd at something that they are not. Hopefully in your case it is a 1:100 ratio. That would mean that in your case (in an optimal situation - that is assuming no loss with the cube) you would lose 1mw per 100 through the polarization. So you would end up with 1980mw with two 1 watt lasers.

    If you go through with this process please post the steps you took and more importantly the results! I would love to do something like this...

    -Max

  8. #28
    Join Date
    Aug 2007
    Location
    Netherlands
    Posts
    417

    Default

    Quote Originally Posted by mliptack View Post
    I am willing to bet they are spec'd at 1:100 polarization ratio - whether or not that is the truth. Like Dave mentioned, sometimes they are spec'd at something that they are not. Hopefully in your case it is a 1:100 ratio. That would mean that in your case (in an optimal situation - that is assuming no loss with the cube) you would lose 1mw per 100 through the polarization. So you would end up with 1980mw with two 1 watt lasers.
    Hm, let's hope so..

    If you go through with this process please post the steps you took and more importantly the results! I would love to do something like this...

    -Max
    I'll definately go through with this process. However, it will not be within some days or weeks. But I'll keep ya'll up to date!

  9. #29
    Join Date
    Nov 2007
    Location
    Southampton, UK
    Posts
    458

    Default

    Sorry - deleted, posted to wrong thread
    Last edited by greenalien; 04-03-2008 at 01:42. Reason: Deleted - wrong thread!

  10. #30
    Join Date
    Nov 2005
    Location
    Melbourne, Australia
    Posts
    3,702

    Default

    Quote Originally Posted by mliptack View Post
    I am willing to bet they are spec'd at 1:100 polarization ratio - whether or not that is the truth. Like Dave mentioned, sometimes they are spec'd at something that they are not. Hopefully in your case it is a 1:100 ratio. That would mean that in your case (in an optimal situation - that is assuming no loss with the cube) you would lose 1mw per 100 through the polarization. So you would end up with 1980mw with two 1 watt lasers.

    If you go through with this process please post the steps you took and more importantly the results! I would love to do something like this...

    -Max
    I have not tested myself, so I really don't know. I just reposted what a customer who knows his stuff said...
    KVANT Australian projector sales
    https://www.facebook.com/kvantaus/

    Lasershowparts- Laser Parts at great prices
    https://www.facebook.com/lasershowparts/

Posting Permissions

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