To accurately account for the diffraction efficiency and the polarization state of diffracted rays, characteristics of gratings like their microstructure is important to consider in the optical simulation. OpticStudio has supported the simulation of gratings for a long time but without considering the diffraction efficiency. Their ability to diffract rays in any desired angle, and their wavelength and angular selectivity allow the creation of optical systems that are more compact and lighter than traditional designs, where complicated and bulky structure with prisms and freeform surfaces are usually required to achieve the same performance. Recently, SRGs have become popular in modern applications, such as head-up displays (HUD), augmented reality (AR) and virtual reality (VR) head-mounted displays (HMD). Surface-relief gratings (SRGs) are widely used in many types of traditional optical systems, such as spectrometers, beam splitters, 3D scanning systems, diffractive lenses, and pulse amplification systems. For simulation with 2 dimensional gratings, please refer to Dynamic workflow between Lumerical RCWA and Zemax OpticStudio. Note the plugin introduced in this article mainly support 1 dimensional gratings. OpticStudio grating tools beta function update history | Zemax Community The DLLs in this article receives regular updates. Note: This feature is only available in Ansys Zemax OpticStudio Premium/Enterprise. This article will also explain how to use the Vizualisation tool to check the grating profiles. In this article, the methodology used in the DLLs will first be briefly introduced, and then the DLL parameters will be explained. They are all diffractive DLLs to model surface-relief 1D gratings. In this article, several Dynamic Link Library (DLL) files that have been added since OpticStudio 20.1 are introduced.
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