help on beam knife edge alignment and correction

[ManoleStefan]

Hello! I wish you all a happy new year!
I want to build an rgb, I already have 2 NDG7475T diodes, a NUBM44 v2 diode, a nubm0E diode.
I'm missing a lot of red and I was thinking of building a knife edge configuration with 8 or 10 Mitsubishi 501p73 diodes.
But I don't know what to use to get a beam as thin as possible, especially in red.
what recommendations do you have for optics?

Respectfully,
Manole Stefan

[VDX]

... maybe not "to get a beam as thin as possible", but a "sharp image" of the diode emitter, what's essentially a line, then align them along the knife edge and "stack" all the lines to a quadrat or rectangular beam profile.

For this the common collimator optics, used with the small diode modules, should be enough ...

Viktor

[ManoleStefan]

... maybe not "to get a beam as thin as possible", but a "sharp image" of the diode emitter, what's essentially a line, then align them along the knife edge and "stack" all the lines to a quadrat or rectangular beam profile.

For this the common collimator optics, used with the small diode modules, should be enough ...

Viktor

yes, but after I line up all the beams to form a square, can't I use some lenses to make the square smaller? red diodes generally have a wide beam and must be corrected to look good even at a greater distance.
but I don't know what optics to use, can I use the lenses in the image after combining the rays through PBS? or do I have to use the lenses in the image separately, before PBS for each knife edge separately?

[ManoleStefan]

I found these lenses on ebay, I talk about them in the previous replay

[mixedgas]

If you do some digging on the search engine, you can fix pictures and details of some wonderful designs here... Might be easier then asking questions.

Steve