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  1. L

    Shooting in Las Vegas

    First, I'm not going to argue which theory is more valid. I will argue that there is more that one theory. Second, Your rants sound pretty emotional to me. Third, If you think that money doesn't have a huge impact on society, then I'm afraid you are a bit deluded. Further, If you don't...
  2. L

    Shooting in Las Vegas

    I believe as humans we have a need to try and understand why things happen. Its both emotionally helpful and practical to do so. Truth is though, we will never fully understand exactly what goes on in another persons mind. One simple theory why this guy left no clues or manifestos could be he...
  3. L

    Shooting in Las Vegas

    It should pretty obvious. The "Who" are those that stand to make more money from gun sales. Answer the following question. How is my theory any less relevant than Andrew124C41's? Not just your emotional take on it, actual facts. Here is another mental exercise. Use your same "Who and...
  4. L

    Shooting in Las Vegas

    I have another theory that can compete with yours.... What if it was perpetrated to make people think the feds were going to make stricter gun laws, thereby increasing the sale (profit) of guns and ammo.
  5. L

    The " Blue Katar " project

    Exciting project. Is this meant for handheld? I was thinking about something similar for a projector. What about the N465? I thought it was the same as the 07E minus the ball lens?
  6. L

    Knife-edging four NUBM44 in Lasertack micro module

    You will have some aberration from the beams entering at a slightly oblique angle. It will be much less that the "knife edge" technique with some of the beams entering off center of the cylinder (especially when the beams are converging) I would think you only need to shim the cylinders on the...
  7. L

    Knife-edging four NUBM44 in Lasertack micro module

    Have you thought about "stacking" instead of "knife edging"? ---- instead of llll. Basically, turn the diodes 90 deg and the cylinders 90 deg. This way all beams go through the center of the lenses. Also when you converge the spots to overlap the aberration effects are much less.
  8. L

    RGB laser on ebay for 9 bucks??

    Thanks RC. The world really needs DO-GOODERS like yourself to protect them from all the evil doers. Maybe you should check all ebay sellers to make sure they are listing things at the "correct" price.
  9. L

    Knife-edging four NUBM44 in Lasertack micro module

    Move your cylinder lens pair farther away from the diode for greater magnification. At some point you will exceed the aperture of the output lens. As mentioned earlier the distance from diode to telescope lens make a big difference on magnification.
  10. L

    Knife-edging four NUBM44 in Lasertack micro module

    The far-field spots can be made to overlap as shown. The more the beam is expanded the larger the "gaps" on the output lens of the expander will get. You will need to make a modification to your knife edge set-up. The distance from each diode to the input of the BE has to be equal...
  11. L

    Seeking links to good knife edging techniques material.

    The problems is the distance between the emitters. Even with the diodes close together the emitters are very far apart(relative to the width of the emitters). You will always end up separate beams after the focusing lens. Knife edging effectively put the emitters next to each other. And if...
  12. L

    Fun find! may be useful to you builders?

    I thought the same thing until I saw the patent document. Look it up. You will be surprised at how simple but brilliant it is.
  13. L

    NUBM07E How I have missed thee.

    I found that my 07's were just slightly out of focus with the gball. It is very easy to "re-focus" the g ball with 2 positive lenses. 07=====()===()====> . Adjusting the distance between the two positive lenses can bring the diode into perfect focus. I didn't try, but am guessing it can help...
  14. L

    NUBM07E 465nm 2.9W Diode Test (Hitting 470nm+)

    Actually, no need to rotate 90deg. Correction actually takes place on the slow axis. The orientation of the diode in the picture will produce a "-" horizontal line in the far field with the orientation shown. The blue "pill" shape on the picture is what strikes the collimation lens. This...
  15. L

    My first DIY laser diode array - honing the details

    When driving laser diodes in parallel best practice dictates the use of ballast resistors. 1 ohm non-inductive in series with each LD. As mentioned above, if one dies open the other gets 2X the current. I would recommend series if l possible.
  16. L

    Extracting Diodes From Nichia diode bank

    Solders are available with many different melting points. Here is how I would do it if the '06 has a built in lens.... First I would cut two diodes of the block with a band saw. Next I would cut into the block on each side of the diode till I hit, or very near hit, the diode rim. After...
  17. L

    Seeking links to good knife edging techniques material.

    Good to know. Thanks for testing.
  18. L

    Seeking links to good knife edging techniques material.

    How much power is lost on the 3 element as compared to the G2? I know I have measured myself but don't remember.
  19. L

    Seeking links to good knife edging techniques material.

    I try to teach my photons to be nice to each other. Not really. Just necessity. This was before DAve had his 2mm lenses available and before cylinder pairs specifically for diodes were available. The shortest FL -cylinders I could find were -12.5. If I recall the positive cyl was 90mm FL...
  20. L

    Seeking links to good knife edging techniques material.

    Here is a design I did a few years ago. Just another way to arrange things. [/URL][/IMG]


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