Recent content by Jubathoph

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...

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.

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

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...

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

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

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

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...

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!

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...

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.

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.

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

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