Hello Raju

Yes OpticsStudio can be used to simulate light propagation/ray tracing through microlenses. There is a forum thread that gives the limitations of our software: 

The main point to get from that is “As long as the optical components in the system are larger than about 10x the System Wavelengths and accurate dispersion data is available, OpticStudio can be used to model propagation at any part of the electromagnetic spectrum.”. So I believe this is the case for your system.

You can model your system in both sequential and non-sequential. I have a copied a few references below:

• In sequential, you will use a user-defined surface and the most commonly used is us_array.dll. A sample file is here "{Zemax}\Samples\Physical Optics\Lenslet Array.ZMX". To study diffraction effects with micro-lenses in sequential mode: https://support.zemax.com/hc/en-us/articles/1500005575542-How-to-use-POP-with-lenslet-arrays.
• In non-sequential, have a look at the array object. There are some examples here {Zemax}\Samples\Non-sequential\Geometry Creation. 
  An illumination example is given here: https://support.zemax.com/hc/en-us/articles/1500005489121-Fly-s-eye-arrays-for-uniform-illumination-in-digital-projector-optics

Tomorrow and Wednesday (September 28-29), we have our user conference called Envision 2021. There will be a talk from Wilfried Noell , Director of Research & Development at Suss. They are specialized in micro-optics. Their talk is about multichannel micro-optics for compact automotive lighting solutions. 

I believe today is the last day to register: https://go.zemax.com/envision-europe-2021-registration.html

Even if you cannot attend the conference (because it is in european hours), you will able to access via on demand until Friday 1st October.

If you have any questions, feel free to contact us. If you’d like a trial version or a demo, please email our sales@zemax.com. I’ll let them know about our conversation.

Sandrine