OptoFidelity Articles

In the world of metrology, achieving precise optical alignment is critical for accurate measurements and ensuring the reliability of the system. The WG-IQ metrology system is no exception, and it presents a unique challenge when it comes to aligning its camera, which is mounted on a 180° rotation stage. In this blog post, we will explore the innovative use of two autocollimators that enable the formation of a stable optical axis, making the optical alignment of the WG-IQ metrology system possible and efficient.

In the rapidly expanding field of augmented reality (AR), the precise measurement of diffractive gratings used in AR devices is crucial for optimizing their performance and user experience. Therefore, the choice of measurement technique can significantly impact the accuracy and efficiency of the process. While Scanning Electron Microscopes (SEMs) have been a popular choice, Littrow diffractometers are emerging as the superior alternative for evaluating AR diffractive gratings. In this blog post, we will delve into the reasons why Littrow diffractometers should be your go-to choice for assessing the performance of diffractive gratings in AR devices.