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  1. X

    Line-Forming Lens sources these days?

    Looking for a (semi-cylindrical?) lens that'll take a +/- 2mm beam, and give me a nice flat divergence such that it projects a line, rather than a spot. Preferably glass - I could be passing up to 8W of 445nm through it, so I want to have the thing have a fairly high optical damage threshold...
  2. X

    Custom host fabrication?

    I have a plastic-bodied hand-held case, the form-factor of which I love. I would like to find someone who can replicate this item in aluminum so I can use it as a laser host and not melt the case and cook my diode. See pics. Yes, it's an old Radio Shack digital tire pressure checker lol. But...
  3. X

    Been a few years - what wattages are we up to now?

    I've been on here on & off since the very beginning. Every few years I pop on to get updated. Last time I was on here around 2017 I picked up several 445nm 3W blues (they're still alive amazingly!) Looking around now I believe I'm seeing that 8W diodes may be available? Looking for some...
  4. X

    Tunable Diode Lasers? Or, 609.5nm?

    I'm doing an experiment with SPPs (Surface Plasmon Polaritons) on a metallic hydride, coupling the beam to the surface with a BK7 prism. I'm needing either a tunable laser that can include the range from 635nm to 609nm, or alternately, a 609.5nm source. Are either available for less money than...
  5. X

    Current Limiting with Resistor only...?

    I am very aware of the value of using constant current sources with my diodes, having started off with the venerable Daedal driver several years ago. But my question here is: If I want to run a simple test setup with a diode from a battery, say for the purposes of the math, a pair of 1/2AAs...
  6. X

    445nm diodes only?

    Long time no see! Back after my usual year+ absence... and I hope this message finds you all well and having a great deal of coherent fun! I'm looking to grab a few 445nm diodes only - 1.0W or above. I didn't see anything in the GB section - anyone have a store that's running with these...
  7. X

    W/cm^2 to Joules conversion?

    I need to convert some laser power specs. For the sake of convenience, let's say I have a 1 Watt 445nm laser irradiating exactly 1 square centimeter. Question 1: Does this represent, properly, 1W/cm^2 ? Question 2: if Q1 is correct, how would I convert that to joules per cm^2? If Q1 is...
  8. X

    EDL-2 Laser Diode Driver IC: 10~350mA, TTL modulation

    In perusing various TTL modulatable LD driver circuits on google, I found this one: EGISMOS Technology, Laser Diode Driver, Laser Driver IC, Laser Driver Circuit, Modulation Laser Driver IC, TTL Modulation Laser Driver Max I of 350ma, in only an 8 pin package with minimal support components...
  9. X

    445nm and skin contact?

    Just wondering if anyone on here has experienced (accidentally or on purpose) beam to skin contact? I ask because I can burn dark items with my 250mw red, but it doesn't burn skin (at least with short (<5 secs duration) contact)... do I need skin protection with the 445nm 1W lasers? And I...
  10. X

    Back after a few years... 445nm Group Buy?

    I've been off of here for a few years - been playing with microcontrollers! I don't see any GBs listed on the GB board - does anyone know if any are being planned? I'm looking for JUST the diodes, not assembled units or kits... 130s, 140s, 150s... anything I can get around a watt from...
  11. X

    State of the Art 2009: Available powers?

    After a long absence, I'm looking to grab a few new diodes. The last time I was on here the Senkat reds were among the best (200+mW) and the PHR-8X (?) BluRays were putting out around 35mw if I recall correctly. I still have 3 Senkats running nicely and one BluRay, and I'm ready for more, but...
  12. X

    Nd:YAG Rod, Ardel Kinematic uPositioning Table

    I put up a few items on eBay that I thought might be of interest to some folks here. They are: Nd:YAG or Nd doped glass Laser Rod, 11" x 3/8": http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=250206059561&ssPageName=STRK:MESE:IT&ih=015 Ardel Kinematic micropositioning optical table...
  13. X

    Question on using polarized beamsplitter/combiner

    I understand that when using a polarized beamsplitter/combiner cube to combine two same-color beams, that one of the beams must be oriented one way, the other beam 90 degrees to that. The resultant beam, I would guess, then has both H and V polarized components, yes? If so, how does one cascade...
  14. X

    Like to see an OPTICS section started

    We by necessity deal with more than just diodes and rods and tubes here - we deal with optics. Many folks are doing extreme stuff with the OUTPUT of their lasers - anything AFTER the generation of the beam is optics. I'd like to see you add a section specifically for optics - lenses, beam...
  15. X

    Cube beamsplitters, pellicles, lens sources?

    Hi - Anyone have any good sources for beam spliter/combiner cubes other than Edmunds? Looking mostly for stuff in the 650-670nm range, specifically combiner cubes to stack multiple diodes. Edmunds lists the 5mm cubes (I want the small ones) at something like $150.00 each! I'm looking for...
  16. X

    20x DVD burners - soon to be CHEAP!

    At CompUSA anyway. They are going out of business, probably close down around end of January. I went there today and saw STACKS - like around 100+ - 20x DVD burners, originally $54, currently 20% off... and there were just as many there today as there were two weeks ago when I went in. I figure...
  17. X

    Custom Plastic Case Fabrication?

    I've rough-designed the case I want to put my laser project in. It's sleek, fits the hand nicely and has some nice curves, monitor/status display windows, adjustment and switch holes, battery compartment with nice cover, internal ribbing and custom circuit supports, etc. Which means that I will...
  18. X

    74154 TTL IC in Surface Mount (SOIC)

    When I started designing digital stuff, I used to use the 7400 series extensively. Now that they have nearly all become available in SOIC (Surface mount) packages, I have been continuing to design with them... BUT - one of the chips I use a LOT is the 74154 - 4 line to 16 line mux/demux - and...
  19. X

    Nd:YAG rod FS/Trade

    Up for trade (or sale, but would prefer trade) is one large Nd:YAG rod. Pictures of this rod are available at this post: http://www.laserpointerforums.com/forums/YaBB.pl?num=1196435338/3#3 If a significant cash offer comes in, I'll consider it (it IS Christmas time... I can hear my credit...
  20. X

    Nd:YAG rods on eBay

    This would have sent me into fits of ecstasy at one time in my life... now they're everywhere! http://cgi.ebay.com/NEW-3mm-x-50mm-Nd-YAG-Rod-for-DPSS-Laser_W0QQitemZ7527429090QQihZ002QQcategoryZ53141QQssPageNameZWDVWQQrdZ1QQcmdZViewItem Nice rods... 3mm x 50mm, $189.00, 50 available. In case...




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