Recent content by donprado

Thanks for your work and the great insight into the diode :wave:

Hey - great work! Now we finally have Terminator 5 :beer: Rep+ for you!

I had to laugh when I saw the beer - seems to be a good place to work:beer: What nice lasers do you have? Do you work on a RGB labby set?

I'm not sure if Trevors link already helped - I'll try to explain: Look at the attached image: green is the laser beam. The divergence is the full angle between the two green lines. You measure the diameter of the beam at two positions D(initial) and D(final). To calculate the divergence, you...

I have a similar camera case for the optics of my telescope - it's a very good solution, especially because it's dust free. But I really like your antique case - it has style!

Thanks for this nice summary of diffraction theory:gj: I just want to give a warning: savety goggles are a MUST with diffraction gratings, especially with glass gratings. Plus, with goggles you can measure the distance of the spots much more precise, because you avoid the large blooming:yh...

Thanks for your tricks guys. :wave: I'm sure both approaches are very helpful, depending on the the host and the preferences. Especially when you don't have a focus ring, it's very bothering to adjust minimum divergence. I have a similar problem: somehow stopping my beam expander at minimum...

Hey - we have almost the same frame with a mirror! Now I only have to figure out where to get this color and when my wife is at her parents:eg: Very cool - probably you could add a permanent installation of a spirograph in your living room...

Re: FS: Moving Sale - 405nm (600mW+), 445nm (1,200mW+), 650nm - Various Lasers & Stuf Rep+ for showing responsibility and giving good advice! This is unfortunately very rare! PS: I have to spread some rep first - sorry.

Wow - great beamshots! I wonder if we find the lasers after March 26th here in our BS&T section:drool:

You must have a great mechanical talent and equipment:wave: Thanks for your answer!

Wow - a very demanding project. I think precise scanning is more complicated that having the small focus in the right position! :bowdown: if you get some results with this project!

Hallo DAST - willkommen im Forum! It was more or less the same for me - I was interested in lasers since I was a child but lasers became a hobby for me when I bought a green pointer at ebay and I discovered this great forum! Have fun participating ... :beer:

Yesterday I reached the page and saw some changes at least on the page for Laser Accessories - for sure maintenance. Probably they come up with some new stuff:yh:

I got excellent batteries from LarryDFW: Sanyo - low internal resistance He has a webpage for very easy ordering and payment. The batteries came very well packed with a small manual and savety instructions. Very professional. The only minor issue was that I didn't get a confirmation of my...