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  1. Jubathoph

    Results: Collimating with cylindrical lens instead of Asphere

    Update, I did a back-to-back comparing to a long FL asphere lens (Thorlabs A240, 12mm diameter & 8mm FL), and 6x cylinder lenses operating on the slow axis. This is similar to the tried and true approach for correction with cylindrical lenses, and ultimately is superior in that there is much...
  2. Jubathoph

    Results: Collimating with cylindrical lens instead of Asphere

    That's right, but only at a certain distance; if you match the size on fast & slow axes at aperture you would still have different divergences & the beam will eventually turn into a long rectangle.
  3. Jubathoph

    Results: Collimating with cylindrical lens instead of Asphere

    Just measured it, it was .365" at aperture, .930 at 36', calcs to .67mrad if I did that right.
  4. Jubathoph

    Results: Collimating with cylindrical lens instead of Asphere

    I have been experimenting with different setups to reduce divergence on multimode diodes. One idea was to just use 1 cylindrical lens for each axis (rotated 90 degrees) and eliminate the aspheric collimation lens completely. Doing this allows you to use an extremely long focal length cylindrical...
  5. Jubathoph

    Garage Machine Shop: open for business

    Not sure who this is directed to, but just to be clear I am not selling drivers or software.:cool:
  6. Jubathoph

    Garage Machine Shop: open for business

    Teaser for next project. Designed in CAD & printed, next step is machining parts.
  7. Jubathoph

    Garage Machine Shop: open for business

    OK I see what you are saying, that would probably work for the right application, with the right grind. Cheers
  8. Jubathoph

    Garage Machine Shop: open for business

    That would work for some applications where the diameter is not critical. When parting it is not very predictable when the remaining material will break off as it gets extremely thin. Even with light tool engagement. Therefore you don't know exactly how close the cutter is and the diameters...
  9. Jubathoph

    It is hard not to, you are everywhere. Are you the new step mom for the forum? Cheers!

    It is hard not to, you are everywhere. Are you the new step mom for the forum? Cheers!
  10. Jubathoph

    Garage Machine Shop: open for business

    You would be trading time for precision trying to part at the same time as turn a diameter. Not sure how precise that would be. Those pins had to hold .0003" (3 ten-thousanths) for a press fit. One thing I learned is time saving meathods only work if you don't end up scrapping the parts!
  11. Jubathoph

    Garage Machine Shop: open for business

    I made system that allowed me to machine multiple parts with 1 operation, i.e. turning the diameter for 10 parts at a time then the smaller diamter, chamfer & parting for each part. saves a lot of time vs making a whole part 1 at a time. for the stainless bracket parts I machined the outside...
  12. Jubathoph

    Garage Machine Shop: open for business

    When I get some bandwidth I'm thinking high power RGB handheld. It's been done to death I know, but may as well put my spin on it.
  13. Jubathoph

    Garage Machine Shop: open for business

    It was kind of tricky. I milled 1 side flat then superglued it to a sacrificial piece of aluminum. Then milled the other 3 sides on a rotary table. Superglue softens at elevated temperatures so I hit it with a blow torch and it came right off.
  14. Jubathoph

    Garage Machine Shop: open for business

    Had a customer needing very small precise parts. They are for an optical assembly, not sure exactly what (top secret)
  15. Jubathoph

    Garage Machine Shop: open for business

    Those are totally doable. But for the effort may as well go with something original.
  16. Jubathoph

    Garage Machine Shop: open for business

    The metal casting and 3D printer really work well together, & open up some pretty cool possibilities.
  17. Jubathoph

    Garage Machine Shop: open for business

    Thanks, from the machined surface I sanded with 250, 400, 1000, & 1500 grit then polished with the dremmel. the sanding was really quick because the surface was perfectly flat, no more than a few minutes per side.
  18. Jubathoph

    Garage Machine Shop: open for business

    LeBlonde lathes are solid & that would be a great one for someones garage. Mine is maxed out, no way my wife would allow another lathe in there!
  19. Jubathoph

    Garage Machine Shop: open for business

    Hello LPF, it has been a long time since I have posted, having taken a break from the hobby for some time. In that time, I have been pretty fortunate to acquire a garage and a solid assortment of manual machining tools: full-size knee mill Lagun FTV-2, precision lathe Monarch 10ee, engine lathe...
  20. Jubathoph

    1.2W red build: Vishio HL63283HD

    This diode has a lot more potential but it will need corrective optics. Something to be said for trying something different.




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