Hello All,
I’m trying to design an optical system to make a collimated line beam.
I use led light source couple to fiber. Light from the fiber end with 0.2 NA is the source for the lens. I used the Plano convex lens to collimate the light (circular beam). after collimating I use the cylinder(Plano convex cylinder lens) to collimate it into a line beam.
will this work or should I use 2 cylinder lens by replacing the first Plano convex ?
Thank you.
Hello Umesh,
Generating a collimated line can be done in many ways but the question is if you have any other requirements and constraints. The following is the result from collimation using two cylindrical lenses from a 200um core MM fibre with 0.2NA.
Is the distribution even enough? Is the X and Y divergence small enough? Does it need to handle a wide range of wavelengths? Is the light later collected and used to the beam should be free of aberrations? Is the space it’s taking small enough? Should it use catalogue optics? …
I would recommend defining the requirements more accurately before starting to choose optics. 
Best wishes,
Daniel