Optical setup: proper lenses selection

[MG_xy]

Dear all,
I am going to realize an experimental optical setup and I need your suggestions to make the correct selection of lenses.
A polychromatic light beam coming from a monochromator (400-700, slit dimension: 1 mm, cone angle 11°) has to be focused onto the base of a cylindrical lens.
I need the light beam striking onto the glass prism being almost parallel through the path along the prism.
I think that a convergent beam with a section of 2 mm can “simulate” this ideal situation.
Can you suggest me a combination of lenses able to direct the light beam from the monochromator to the prism?

Thank you in advance

 

[UltrafastPED]

Some drawings would help ... it would also help to know what the setup is for.

 

[MG_xy]

Thank you for your fast reply.
In the attachment you can find a raw scheme of my experimental setup.
I thinck that a pair of achromatic doublet lens could be a good choice.
But I need some suggestions to make a proper choice of focal lenses in order to obtain a beam focused on the the base of the prism with a small section (1-2 mm) and with a very small cone angle.
Could you help me?

Thank you in advance

 

[UltrafastPED]

For general principles, in a handy format, always check the optical component vendors!

In this case Newport provides a complete analysis of your situation:
http://www.newport.com/Focusing-and-Collimating/141191/1033/content.aspx

They will also sell you the correct achromats; for example, this one is good for 400-700 nm:
http://search.newport.com/?q=*&x2=sku&q2=APAC17

 

[sardar]

for your help.

I would suggest the following lenses selection for your optical setup. Firstly, it is important to select a lens that can properly focus the polychromatic light beam coming from the monochromator. Since the light beam has a cone angle of 11°, a lens with a wider aperture such as a plano-convex lens or a double convex lens would be suitable. These lenses have a curved surface that can converge the light beam to a focal point, allowing for better control and manipulation of the light.

Next, to achieve the desired parallel path of the light beam through the prism, a collimating lens would be necessary. This lens can be placed after the focusing lens and before the prism to ensure that the light is parallel as it enters the prism. A convex lens with a larger focal length can be used for this purpose.

Finally, to achieve a 2 mm section of the light beam, a beam expander lens can be added after the collimating lens. This lens can expand the diameter of the light beam while maintaining its parallel path. A combination of a convex and a concave lens can be used to achieve this expansion.

In summary, a suitable combination of lenses for your optical setup could be a plano-convex or double convex lens for focusing, a convex lens for collimation, and a combination of convex and concave lenses for beam expansion. However, the specific lenses and their parameters may vary depending on the exact requirements and constraints of your setup. It is always recommended to consult with an optical specialist for a more accurate and personalized lens selection. I hope this helps and good luck with your experiment.