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Hey Guys I read a threat about using a telescope with a laser and I was wondering if a objective lens of a small sized camera wouldnt be useful for using with a laser? I mean if I manage to control the focus and zoom seperately I could have a pretty handy and even retractable device. Would be...

How about THIS 70W laserdiode

Am I seeing that right? the cube gets the beams from left and up and the combined beam exits down? But did I get it right that there are lenses that can combine these parellel beams? When You get the beams to hit the same spot wouldnt it have the same effect as having a combined beam hit it...

thanks that sounds good. how about materials? are there any limitations to what the lens can be made of?

so could a small objective lens be used to focus it?

As far as I know diodes differ a little in wavelength but you would still need to polarize? what would happen if i used the color combiner with diodes of the same wavelength? I saw arrays with knife edging where they had several beams not too close together but a lens at the end focused them...

so basically any transparent material can act as a lens? could I also use the objective lens of a small old digicam?

Hey cool array youve got there! I am pretty new to knife edging.. why arent you using shine through mirrors? would it be less efficient? Also I am curious: Is this the technique they sometimes use on these very powerful industrial lasers for cutting and welding? Like maybe they combine for 30W...

Hey folks! I thought about this topic for a long time now and want to hear other peoples opinions (and wisdom of course ;)). companies like brother (the air scouter) have made different products that can project pictures right in to your eye. Brother stated that they use laser diodes to project...

ok I think then there is still hope. Since the diode was as bright as it was in the beginning and only stopped emitting light when I cut the energy source. So I hope the spike wasn't too big. I am going to build my laser with a socket so I can test it with this diode and if it turns out dead I...

Thanks for your reply. I was hoping to get a little more detail about that since I dont really know what laser influences wich material. Is any collimator lense appropriate for any laser? Also I am looking for really small lens systems and was hoping for suggestions

So this way is got in order to combine colors but also for increasing power? like instead of three different wavelengths I could have this array with three lasers of the same wavelength? What excactly is knife edging? (I hope I dont interfere too much with the original threat)

Thanks it would be great to get some assistance since I am having a hard time gathering the exact values I need. Well too bad I didn't know that earlier. I just read that this is the way to find out wether your diode is the right one. As my new knowledge goes the problems with direct connections...

ok so the closer I stick to the voltage the diode needs the more efficient the whole circuit will be? thanks for your responses you helped me a lot

So with the driver from this guide I can basically use any diode and an energysource with any voltage?

Hey there! I want to build a real small laser (as small as possible). As far as my knowledge goes any laserdiode needs a lens to reach its full concentrated power. right now I am using a red laserdiode I harvested from a 16x DVD burner. Now what lenses would be best for using with this little...

if you combine two beams of the same wavelenght does the power add up too?

still I need to ask about this guide: Is it only about controlling current? I mean as far as I got it this circuit keeps the voltage constant and lets you control the current. Do I only need to control current in order to control the laser power output? doesnt the voltage affect this too?

Yeah I didn't really know were to start with my questions. I just wanted to see if THIS guide would fit with my project and if I have to modify it.

I don't know if it's my english that starts lacking or missing knowledge but I don't excactly get what You mean. So if You don't mind would You try to explain it in a different way and more detailed? Maybe I should also add a little detail on what I have in mind: I'd like to stuck all the...