Some RCWA DLLs cannot be found in OpticStudio 21.2.1

  • 13 July 2021
  • 3 replies

Hi, I was reading Michael Cheng's article 'OpticStudio grating tools beta function update history' and have some questions.


This article mentioned 'download link' many times, but I did not see these corresponding links. And I did not see some DLLs mentioned in this article in OpticStudio 21.2.1, for example: 'Polygon grating DLL', 'A new DLL is created for reading pre-calculated efficiency data for 1D/2D gratings'.



I want to know where I can find these DLLs and their usage.



Thanks & Regards,





3 replies

Userlevel 4

The article has this information that may apply to you: 'Note all tools provided here are only available with OpticStudio Premium Subscription.'

Userlevel 6
Badge +2

Hi Dongdong

Sorry for the delay in replying. The dlls are attached to the articles that are mentioned. 

They are actually in the zar file. When you open a zar file, you can check its content here:


I didn’t find the Polygon grating DLL but I’ll check with my colleague

Let us know if there is anything else you need.


Userlevel 6
Badge +2

Hi Dongdong,

Sorry for the confusion. The polygon grating DLL can be downloaded from the following knowledge base article.

We will also upload it into Code Exchange later.


Please let me know if you have any more questions.

Thank you!


Best regards,