Tobias Lauinger
Ansys Employee

Hello Yassine,

to have something to start, I would recommend to have a closer look on the the project data of this AppGallery Article:

https://optics.ansys.com/hc/en-us/articles/9216542212115-Backlight-Unit-Analysis-and-Optimization

The article adresses most of the topics you have mentioned.

In addtion the "Ansys Speos Getting Started Training" on our Ansys Learning HUB and you're able to master your project: (https://jam8.sapjam.com/groups/n6eyR8p8BeUofcheLnuqBL/overview_page/uwVjLWyXRyvOzNFRrIdiNE)