Reply to laserboy99
I don't prefer mosfets.
You may get the ferrite core from CRT television circuits.
Coil is put off to the side, because vibration mode is torsional.
This is incomplete. Lacking the FLY-BACK control.
I mentioned about this to the cartoonist (on another forum: PL).
He revised his drawing.
Now it is almost complete. But it is still too slow.
Good job.
Who draw this?
It looks like a professional work!
But KUNTMAN's scanner is much faster than KUTMÜN's.
15625 Hz >> 39575 rpm. (Approx. 30 times)
There are threads on lidar in this forum:
http://laserpointerforums.com/f47/homemade-scanning-laser-color-projector-tv-32628.html
http://laserpointerforums.com/f47/fast-scanning-camera-lidar-69383.html
...Dimensions of the mirror in Kuntman's scanner is very large. There will be no diffraction and undesired interference. (This also means, there is no limit for the power of the incident beam.)
And...
Kuntman's scanner has an additonal advantage over micromechanical systems. Since it is...
--when you make the mirror very small, laser beam will be diffracted (instead of being reflected).
(Figure below).
Tex. Inst. accepts this phenomenon as an undesired fact.
http://focus.ti.com/pdfs/dlpdmd/Using_Lasers_with_DLP(r)_Technology.pdf
we can see a typical inteference pattern in the...
We replace the mirror of a biaxial scanner,
(Kuntman's Scanner: http://laserpointerforums.com/f47/homemade-scanning-laser-color-projector-tv-32628.html)
with a detector and laser. Laser emits short pulses. Detector receives reflected light. Simple calculation gives the distance of the object...
QUOTE:
How did you modulate the green laser at such high frequencies?
Green laser modulation was explained in this thread.
Is this how the scan angle varies click here
Yes.
Also how did you make the scan linear
Is it like this patent i found online click here
No. We dont use any...
Yes, the mirror should be scaled precisely and laser CNC cutting is very important.
While I was working for the university I made use of this technique.
But it is not critical; simple filing is enough for many purposes.
Sorry, I dont understand what you are asking me.
Will you please express it in a simple wording.
I also dont know what "guts and skills" mean. Is it an idiom?
Thanks.
In this scanner we use a resonant fast mirror.
It is not linear, but it is finely tuned to the frequency of the input horizontal sync. pulses.
We also use a resonant galvo for vertical scanning, for simplicity.
If you like, you may use some nonresonant scanning method for slow axis.
At low...
Reply to clurado:
OK. I will try to take a closer picture.
I think that polygonal mirrors are good only for slow axis.
This point have been discussed in this thread.
As far as I know, Kuntman's fast mirror is the simplest solution for fast scanning.
Maybe you mean something else by "solution"!?