I hope this is the right place to ask this. It is an experiment question.
I have a 785 nm laser and a 1550 nm laser and I need to converge them down to a point. Now I could just manually align the lasers on the same XY-plane and have them hit that spot, but for reasons I don't want to explain, I need to converge them down with a lens.
So far I have the two lasers parallel and really close together. (Beams separated ~2-3 cm) They go though a spherical plano-convex lens and then hit a detector card. Now I know the focal points won't match due to the difference in wavelength, but is there any combination with this setup that I can get them to converge to the same point.
One thing I was thinking was letting the 1550 laser go straight through the center and have the 785 laser refract and meet up at the center.
Any input on this will be very helpful?
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(The above image shows that I can make them aligned horizontally, but getting them to align vertically is killing me. Also this diagram is very crude.)
I have a 785 nm laser and a 1550 nm laser and I need to converge them down to a point. Now I could just manually align the lasers on the same XY-plane and have them hit that spot, but for reasons I don't want to explain, I need to converge them down with a lens.
So far I have the two lasers parallel and really close together. (Beams separated ~2-3 cm) They go though a spherical plano-convex lens and then hit a detector card. Now I know the focal points won't match due to the difference in wavelength, but is there any combination with this setup that I can get them to converge to the same point.
One thing I was thinking was letting the 1550 laser go straight through the center and have the 785 laser refract and meet up at the center.
Any input on this will be very helpful?
(The above image shows that I can make them aligned horizontally, but getting them to align vertically is killing me. Also this diagram is very crude.)