Recent content by sltvm2007

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...

I dont know much about those tiny vibrating structures. what are their dimensions, reflectivity, flatness etc.?

Which mirror? ...The half reflecting mirror?..

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...

step by step diy video projector step3: Modification

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...

step by step diy video projector step3: Modulation

step by step diy video projector step2: TEST1 Before going to play with the video signal:

step by step diy video projector step1: Syc separator

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.