Potential resolution

[Feign]

The OWL printers use a rather complex lensing system to reduce their laser footprint. After watching someone's beta assembly video, it looks like there's plenty of room in front of the Peachy's laser for a small lens stack. Just making a smaller aperture would not necessarily make the beam tighter, as you start getting dispersive lensing effects at very small apertures for physics reasons that I can't remember the names of.

Of course, that would be something for an upgraded or modded Peachy.

[Pete]

Just making a smaller aperture would not necessarily make the beam tighter, as you start getting dispersive lensing effects at very small apertures for physics reasons that I can't remember the names of.

diffraction is the one you're looking for.

[bovalis2037]

Im soo glad what I said made some sense. Thank you for explaining!

Now does that mean that I will be able to (in highly improbable theory) be able to print my own apertures?

[Anuvin]

You probably could, but it would be challenging. If your resin is clear or semi transparent, it won't work. But if you have opaque material, sure. Probably just simpler to poke a hole in tin foil or whatever though.

On the other hand, I bet it prints a little hole in a disk really well. Perhaps one could print sequentially finer and finer aperture disks, which would be really cool.

[bovalis2037]

Thats exactly what I was thinking! The more fine I get my aperture the more fine I can print one and it then becomes a cycle. Im sure that the accuracy would increase but after a certain point it would be negligible.

[rylangrayston]

Thats exactly what I was thinking! The more fine I get my aperture the more fine I can print one and it then becomes a cycle. Im sure that the accuracy would increase but after a certain point it would be negligible.

There is something very appealing to me about cycles like this. I keep joking with everyone about the idea of printing a record, on which is encoded a "song" which when played into a peachy printer, prints another record.
And of course Im very excited to try printing a peachy printer with a peachy printer (Peachy RepRap) .

I have no clue how well these things work in actual practice but I can tell you that the resin blocks uv light very well. Im sure you can print a large aperture, but i don’t know how small you could print one.

What ever happens be sure to post because others (like me ) will really enjoy seeing the process !

[Feign]

diffraction is the one you're looking for.

Considering that the original subject of the thread was using diffraction to create colored prints, I'm a bit embarassed to not have remembered it.

I have no clue how well these things work in actual practice but I can tell you that the resin blocks uv light very well. Im sure you can print a large aperture, but i don’t know how small you could print one.

You've mentioned before though that you can fill a hollow print and it will cure under sustained UV, which would suggest that the cured resin isn't completely opaque to UV. I'm sure it's too opaque to make into a focusing lens for the laser though.

I think most glasses-wearing watchers had the lens printing idea after seeing the column print video. I look forward to running some tests to see what kind of refractive index the resin has and just how smooth it can print with that sub-layer interpolation that was talked about.

I think that it would be easier to write an equation to directly generate lens cross-section based on z-axis and focal point than it would be to make a parametric lens model and use a slicer. The machine that grinds out the lenses for the optomitrist already uses a CNC process that might already be very similar to g-code.

[bovalis2037]

I will!! But I wanted to print a record! One of my friends and i were working on some software to convert super high quality mp3 files to record "bumps" as we've been calling them. And i kept telling him that i have full faith in the peachy cause of its insane z axis resolution. I am still soo shocked at how clear and glass-like that column was in update 13

[Morten]

So is the cured transparent resin transparent to UV light as well as visible? Because I'm thinking about printing lenses now

[nka]

So is the cured transparent resin transparent to UV light as well as visible? Because I'm thinking about printing lenses now

Not sure what you're trying to do, but I dont think you'll be able to print lenses. Those need very high precision and polishing to be acurate.