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beam profile
So I just 'test mounted' my filters and RGV lasers, as follows:
[IMG]file:///C:/Users/3ricj/AppData/Local/Temp/moz-screenshot.jpg[/IMG]
http://www.flickr.com/photos/3ricj/3440541651/
http://www.flickr.com/photos/3ricj/3441354316/
The final beam is white, more or less, with a bit of yellow to it due to green being a bit hot. I will someday at a 473, but for now I'm stuck with a 405.
Anyway.. each of the lasers I have has a slightly different beam profile, and it's making the alignment tricky. Are there any tricks to improving the beam profile? One of the lasers is more oval than round (405nm, if I recall). I know I can swap the optics on that and help a bit, but are there any lenses which will help 'circularize' oval shaped beam profiles?
What's a good method for getting clear photos of beam profiles? ND filters on the camera?
Cheers,
-3ricj
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Anamorphic prisms, masking with knife edges, cylindrical lens pairs and in rare cases with high power, , running the whole mess through a fiber.
Somebody just posted a Melles Griot/CVI app note on anamorphics, and for the the cylindrical lenses the Newtonian collimator math works just fine.
We need dot on the wall at a distance pics to help you.
Steve
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