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  1. Anthony P

    batteries placement on laser

  2. Anthony P

    laser for cutting plywood

    Look here. https://jtechphotonics.com/ Good company.
  3. Anthony P

    Is the "UV Handheld Laser Engraving Kit" legit?

    You may want to contact "Lifetime17". I recently purchased a very nice 405 complete pointer that approaches 2W from him.
  4. Anthony P

    BlackBuck 8M PWM Control

    Any 10k pot will do. Yes, it can be adjusted under power.
  5. Anthony P

    The spam

    ganis622... spam, maybe porn. did not open pm.
  6. Anthony P

    UFO Sightings

    I think there are aliens. I also think that they would consider the human race unremarkable and a minor curiosity at best. There are no resources on this planet that are not easily available elsewhere in the solar system and in the galaxy. Further, human beings are far too high maintenance to...
  7. Anthony P

    Gas lasers still relevant?

    Pics Please. I may be interested in tinkering with them.
  8. Anthony P

    Hologram Laser Questions

    The PL530 OPSL is not that hard to power. It does require a heater circuit. Basically, it just needs 2 LM317 circuits. One for CC to the diode and one for CV to the heater. A simple Al heat sink is adequate, no TE. Green sensitive plates are available from Thor and Integraf. I don't remember all...
  9. Anthony P

    Hologram Laser Questions

    I would recommend starting with transmission holograms first just to get the hang of it. They are simpler and more forgiving. Reflection holograms are far more demanding. Everything has to be perfect. Also, viewing a reflection hologram can be difficult. It may look like a blank plate until you...
  10. Anthony P

    Hologram Laser Questions

    To measure coherence length set up interferometer as shown in the post I referenced with the two mirrors equal distance from the beam splitter. Move one mirror further and further away from the splitter until you can no longer get a nice interference pattern on your screen. The distance you were...
  11. Anthony P

    Hologram Laser Questions

    Use interferometer to determine coherence length of laser. It must be at least several inches or more. Even the slightest vibration during exposure will ruin hologram. Exposure time should be seconds, not minutes. Even at 5mW 2-3 seconds should be enough. Are you using glass plates? Are you...
  12. Anthony P

    Pumping a Ruby Rod

    I read that Edmund Optics now has the ability to custom polish and coat crystal ends which would eliminate the need for external mirrors.
  13. Anthony P

    First build, assembled, not turning on

    Saw your picture on the tape. Something is definitely wrong. BTW I am using single 18650 battery.
  14. Anthony P

    First build, assembled, not turning on

    I have a nearly identical laser here that is fully functional. The beam in the dark is nothing to write home about. To see it clearly requires smoke or dust or maybe spray a mist of water in the beam path. Adjust focus and shine it on a piece of black electrical tape. It should instantly smoke...
  15. Anthony P

    Single line argon = 488 collimated + royal blue flashlight?

    You got me curious (thanks!) so I tried this with 2214 SL 488. I also see the halo even with the actual beam in shadow. It is not noticeable with room lights, only in darkened room.
  16. Anthony P

    Reliable red dot laser module?

    If you want reliability go to Edmund Optic$.
  17. Anthony P

    Hello newbie here trying to troubleshoot a Galileo pointer

    I once had a problem with one of their pointers because the black coating was on the tail cap threads preventing good contact.
  18. Anthony P

    Are there any books or magazines on lasers?

    https://www.ebay.com/itm/184685903981?_trkparms=ispr%3D1&amdata=enc%3AAQAFAAAAkAxbj8gu7l1oU2zDN0lI9nchl76rjjJrOJFlpAgmE0t47uATY%2Bauz%2BtujHZnxf362F2vBUWyDCQQI%2FgCNWqJ%2FeHI0vvQ2bT81HKqNUZOqLj3ECHd39ptdDQBxLYx12tYy3i8v0e1Z4lzOt923hqoDBXtzghsUrCSD367NP%2BJdZn%2FlG%2BxJbOYa73MLE08ydmIxQ%3D%3D&chn=...
  19. Anthony P

    New toy! Uniphase 1145P

    https://www.edmundoptics.com/p/model-1145p-21mw-linear-polarization-lumentum-hene-laser/17389/
  20. Anthony P

    Powering Driver With Very High Amp Battery..

    In product description it states that at 12v input, max output is 120 watts... so at 75v out, max amp out would be 1.6. Also, dummy load is necessary for testing and adjustment.


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