3 Dec
2017
3 Dec
'17
2:44 p.m.
Well, if this is to be believed
https://www.hindawi.com/journals/ijp/2009/150389.fig.002.jpg, I think the
only real problem might just be a slightly less stright line, which could
be compensated for in software. Pretty sure the f-theta lens I have is
made from PMMA. It looks plasticish and most of the cheap lenses are made
from this these days.
Really informative reddit conversation on this:
https://www.reddit.com/r/askscience/comments/3p88vp/how_is_plexiglass_pmma_…
Unfortunately, the f-theta lens that you get with it is optimized for
the near infrared wavelength the laser printers
operate at and uses a
lot of energy when used with a 405nm laser. So direct mirror might
still be the best option (but I have never myself tried the f-theta
lenses in these equipments with 405nm, maybe it still is viable
enough?)
I am currently experimenting with bending mirrors to get a cone mirror
( https://github.com/hzeller/ldgraphy/blob/master/design.
md#cone-mirror-arc-exposure
), but these experiments were not that successful yet (but this
project is only one of many, so things are slower than they could be).
--
*Cere Davis*
Science-Art | Kinetic Sculpture
CereDavis.com
@ceremona <http://Twitter.com/Ceremona>
I have a BB and all
the other components are pretty easy to acquire.
I am currently working on a cape for the pocket beagle for LDGraphy.
which will be nice and compact and also cheaper as the PocketBeagle is
only $25.
https://plus.google.com/u/0/+HennerZeller/posts/SnVTjc24AbJ
Goal here is to actually make double sided boards with two lasers from
two sides.
Anyway, I will probably only have more time on this more later this
year or January to finish up things.
-h
I’m not inclined to work on this alone, but if
other people have a
burning
need for something like this, then I would
certainly like to collaborate!
-Cere
On Sat, Dec 2, 2017 at 11:53 AM, Adam <me(a)adammunich.com> wrote:
Wrong wavelength, resolution.
On Dec 2, 2017 11:04 AM, "Cere Davis" <ceremona(a)gmail.com> wrote:
>
> I mean cool, but why not just use a laser cutter on low power?
>
> ...emailing on the go...
> @ceremona
> http://ceredavis.com
>
> On Dec 1, 2017 5:23 PM, "Jake" <jake(a)spaz.org> wrote:
>>
>> Henner made an open-hardware system for UV curing photoresist, and it
>> works:
>>
>> https://github.com/hzeller/ldgraphy
>>
>> On Fri, 1 Dec 2017, Cere Davis wrote:
>>
>>> I mean if it could be UV laser cured with just a laser cutter on low
>>> power
>>> etch mode, that would be ideal.
--
Cere Davis
Science-Art | Kinetic Sculpture
CereDavis.com
@ceremona