Page 1 of 2 12 LastLast
Results 1 to 10 of 11

Thread: Finding a good green for micro projectors

  1. #1
    Join Date
    May 2009
    Location
    UCSB
    Posts
    670

    Default Finding a good green for micro projectors

    Hi All, in light of the new 445nm diodes I am rebuilding my micro RGB with a bit more umph. Currently what is limiting me is finding a suitable green.

    I would love to get 300mw, but I will settle for ~150mw for round one at least (with the intention of adding another module in at some point).

    I have been limiting my search to 12mm modules (ie, laser pointer cores), although if you know of a good cheap lab style one I am all ears. I will be adding my own TEC for the 12mm modules to keep them somewhat stable. Modulation performance is going to be hit or miss, but I am assuming that all of the 12mm modules will perform about the same when TEC'ed.

    The current contenders:
    ebay #1
    http://cgi.ebay.com/532nm-150mW-Lase...#ht_3314wt_907
    filter - ?
    power - 150mw +/-10%
    current <350ma
    price - $57.99
    current status - maybe try?

    ebay #2
    http://cgi.ebay.com/Industrial-Lab-D...#ht_2200wt_907
    filter - yes
    power - 130mw guaranteed
    current - <280ma
    price - $62.99
    current status - WINNER

    ebay #3
    http://cgi.ebay.com/INDUSTRIAL-LAB-5...#ht_2233wt_907
    filter - ?
    power - 150mw +/-10%
    current - <350ma
    price - $63.5
    current status - maybe try?

    ebay #4
    http://cgi.ebay.com/150mW-532nm-Soli...#ht_3617wt_907
    filter - ?
    power - 150mw +/-10%
    current - <650ma, duty cycle 60s on 5s off
    price $75
    current status - looser

    CNI OEM Series 150mw
    http://lasershowparts.com/store/inde...&productId=222
    filter - yes
    power - >150mw
    current - ?
    price - $275+shipping
    current status - looser

    Buynow.com
    http://www.buynowmobi.com/200mW-532n...en-Laser-Black
    filer - ?
    power - 200mw, no warranty
    current - ?
    price - $49
    current status - maybe try?

    ecrater.com
    http://www.ecrater.com/p/8529237/200...een-beam-laser
    power - 200mw, no warranty
    current - ?, but runs from a single AAA battery!
    price - $39.99
    current status - WINNER

    The CNI one has been ruled out due to excessive cost (over 3 times other contenders!).

    Of the ebay modules, #4 was ruled out due to excessive current draw (a sign of it having been overdriven? if anything, it means a bigger tec/more heat in the system). #1 and #3 seem about the same (although look physically different), but both state unfiltered power which is why #2 wins--it guarantees 130mw of filtered power from <280ma of drive. Of course the modulation performance is still to be determined....

    I am trying to not become dependent on the ebay modules however, because if I try to build another one of these in a year the chance of the same seller still being on ebay is pretty slim.

    That brings us to the other 3rd party vendors, buynow.com and ecrater.com being the top 2 choices. They both offer a <200mw pointer (however do not guarantee a minimum power, and the output is most likely unfiltered). The ecrater one is $10 cheaper, and comes with a free boost driver (won't be of any use in this build, but those are always nice to have around). It is however tempting to get both of them and compare the modulation performance.

    What are all of you thoughts? It would be great if I could convince someone else to try a module or two, although at the $40-70 price point I can afford to get a few to try out.

  2. #2
    Join Date
    Jul 2007
    Location
    west sussex uk
    Posts
    2,279

    Default lasers

    Hi
    I have a laserlands laser in my micro projector
    Works very well had it running for two days at the last meet
    Without tecs and it was great, just keep below 25deg c
    Wish my proper lasers modulated as well ;-)
    One thing to note they have no ir filter on them even though
    They say they

  3. #3
    Join Date
    May 2009
    Location
    UCSB
    Posts
    670

    Default

    That is interesting, have you measured the power after a filter to see how much IR is there?

  4. #4
    Join Date
    Jul 2007
    Location
    west sussex uk
    Posts
    2,279

    Default laser

    Quote Originally Posted by krazer View Post
    That is interesting, have you measured the power after a filter to see how much IR is there?
    no i dont have an ir filter as such but after two dichros (crap ones) i was still getting over 70mw from the 100mw module ,i think the dichro's would have taken out any left over ir
    the beam on the laserlands laser is super tiny, barely 1mm
    so you could knive edge two and still have a tight beam
    but like most laser stuff its a bit of a crap shoot as to if you get a good one or not
    but i was happy with my set up
    i just mounted mine in a ali block with no tec, but did build the whole lot on a heatsink
    see pics
    Attached Thumbnails Attached Thumbnails DSC00721..JPG  

    DSC00720..JPG  

    DSC00730.JPG  

    DSC00694..JPG  


  5. #5
    Join Date
    Dec 2006
    Location
    denver,co
    Posts
    1,078

    Default

    I am looking for the same thing. I did a review of a module on eBay a while ago. I suspect that my results are going to be pretty similar for most of the cheap pointer modules.

    http://www.photonlexicon.com/forums/...ad.php?t=11187

    Chad.


    When the going gets weird, the weird turn pro.


  6. #6
    Join Date
    Jun 2010
    Location
    Washington.
    Posts
    139

    Default

    there is a new "laser company" in town called wlaser.

    i am not promoting them whatsoever yet, as i have not reviewed the "150" mW green module i purchased due to lack of time, but it was reviewed by daguin (LPF member) before i purchased it, and he reported it as over/at spec.

    it was 42.00$ and i truly believe that it is worth ever penny, as i have never had an ebay module do more than ~35 of green for me.

  7. #7
    Join Date
    May 2009
    Location
    UCSB
    Posts
    670

    Default

    I have purchased 2 of the ecrater.com pointer, and so far I have received very good service. The free shipping was actually free (not the we-will-put-it-on-a-camel-for-free-but-its-$12.99-to-ship-it-by-airmail kind of free), the vendor sent me a e-mail in coherent English a few minutes after my order, now I just need the module to arrive

    I am also looking forward to DjHeadie's review of the wlaser module, it sounds like it has high potential as well.

  8. #8
    Join Date
    Jan 2007
    Location
    Cupertino, California
    Posts
    2,130

    Default

    Quote Originally Posted by badger1666 View Post
    no i dont have an ir filter as such but after two dichros (crap ones) i was still getting over 70mw from the 100mw module ,i think the dichro's would have taken out any left over ir
    the beam on the laserlands laser is super tiny, barely 1mm
    so you could knive edge two and still have a tight beam
    but like most laser stuff its a bit of a crap shoot as to if you get a good one or not
    but i was happy with my set up
    i just mounted mine in a ali block with no tec, but did build the whole lot on a heatsink
    see pics
    That thing is tiny!
    CLICKY!!!

    Admin: In the immortal words of Captain Planet: YOU HAVE THE POWER
    Admin: (To quit being a bitch)

  9. #9
    Join Date
    May 2009
    Location
    UCSB
    Posts
    670

    Default

    Update -
    The ecrater pointers are out of the running.

    My 2 pointers arrived today, and they are indeed tiny. They run from a single AAA sized lithium ion cell (unmarked, just generic blue shrinkwrap). They did come charged, but no charger, or other documentation for that matter, was included.

    The power was well below spec, one put out ~100mw, the other put out ~35mw, which dropped to about 70mw/12mw with the addition of an IR filter.

    Furthermore, the modules do not have any kind of beam expander, so the beam is very tiny at the apeture (~0.1-.5mm), but has a very large divergence.

    Conclusion - lets hope DjHeadie's review comes soon!

  10. #10
    Join Date
    Jun 2010
    Location
    Zweibrücken, Germany
    Posts
    606

    Default

    Just following the thread, also building a mini RGB and looking for a usable green.

    Take a look at this, claims 70mW with IR Filter and a divergence of 1.0-1.2mrad in a 12mm housing.
    Sounds realistic

    http://cgi.ebay.de/70mW-532nm-Green-...efaultDomain_0
    Last edited by Solarfire; 08-17-2010 at 08:35.

Posting Permissions

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