6 ms·
But can I use it to burn things?
by xellisx 7y ago
But can I use it to burn things?
- dhabxkxbx 7y agoWhat does “Burn” mean? Break the bonds of just about anything except fluorides and metals? Probably. Deposit enough energy I locally heat the material above it’s auto ignition T? Well that’s a flux question
- xellisx 7y agoYes, to raise the temperature of a material in which ignition can occur. I know the cheap hobby laser machines use a 405-450nm module, which works decent on stuff like wood. Now since it's about half the wavelength, is it more affective in cutting / etching these materials with a lower optical output power.
- wbl 7y agoThat's just straight up energy transfer. Doesn't matter exactly what wavelength you use provided you dump enough energy in, and this one is so inefficient it doesn't make sense.
- semi-extrinsic 7y agoIf you look at CO2 lasers, at 40W ($350 on eBay) you can cut plywood, at 150W ($5000 on eBay) you can cut metal. Both of those are 1040 nm. The 450 nm modules you can get up to 5W ($100 on eBay), but those can hardly cut anything, they're more like engravers.
- deleted 7y ago[deleted]
- mdturnerphys 7y agoCO2 lasers are typically at 10.6 microns. They can cut metal but you need at least 100W and RF pumping. Metal-cutting lasers are more commonly fiber lasers with wavelengths of ~1050nm.
- dhabxkxbx 7y ago“ is it more affective in cutting / etching these materials with a lower optical output power.” Probably because it’s more likely to be absorbed. On the other hand, absorption can’t be > 100%. So a longer wavelength laser an cut just as well for the same power as long as the mtls absorbs all the photons
- dang 7y agoThis looks like a great HN comment, but could you please stop creating accounts for every few comments you post? We ban accounts that do that. This is in the site guidelines: https://news.ycombinator.com/newsguidelines.html https://news.ycombinator.com/newsguidelines.html. HN is a community and we want it to remain one. For that, users need some identity for others to relate to. Otherwise we may as well have no usernames and no community, and that would be a different kind of forum. https://hn.algolia.com/?sort=byDate&dateRange=all&type=comment&storyText=false&prefix&page=0&query=by:dang%20community%20identity https://hn.algolia.com/?sort=byDate&dateRange=all&type=comme... You needn't use your real name, of course.
- dhabxkxbx 7y ago“ This looks like a great HN comment, ” Thank you. I thought it was rushed w/out the explanation that it deserves (it has fascinating implications about the lack of the color blue in nature). Also, I felt it came out as snarky or arrogant, which I didn’t intend. But I was juggling other things :S Unfortunately, I’m afraid you’ll have to ban me. I’ve abused the site far too long but I also have no intention to expose myself w/ a profile (any user with a karma > 1000 is trivial to dox).
- deogeo 7y ago> any user with a karma > 1000 is trivial to dox How so?
- Gatsky 7y agoCan you elaborate? Detach to another thread maybe?
- downwithdang 7y agoYea you go dhabxkxbx! Anonymous or bust!
- shpeedy 7y agoIt's result of frequent shadowban without reason.