News

In the field of precision optical manufacturing, even the slightest error can lead to disastrous consequences. We relentlessly pursue nanometer-level precision every day. But in the machining of aspherical or freeform surfaces, have you ever encountered this dilemma: despite using extremely precise polishing machines and repeatedly optimizing process parameters, the surface shape error remains stubbornly high? Even on some high-order curved surfaces, the more you polish, the more bizarre the shape becomes? The problem may not lie in your polishing process, but in your "eyes"—the inspection system. More precisely: have you rigorously corrected the distortion of the core component for aspherical zero-point testing—the CGH (Computer Hologram)? If this step is neglected, the inspection data itself is skewed, and subsequent precision machining will naturally continue to "go astray."

How can you measure what you can't see? Zhixing Optics' dual-wavelength CGH solution not only illuminates the infrared "visual blind spot," but also deeply evaluates the impact of material properties on high-reliability loads through transmission wavefront detection.

In the landscape of modern precision optical manufacturing, cylindrical lenses play a crucial role. From cutting-edge laser shaping in laboratories to LiDAR in industrial production lines, from barcode scanning equipment to high-precision semiconductor wafer inspection systems, cylindrical lenses, with their unique "one-dimensional focusing" characteristics, have become core components for shaping coherent light sources and correcting light spot shapes. It can be said that the precision of a cylindrical lens directly determines the "vision" of high-end equipment. However, how to accurately measure this "ruler" has long been a difficult problem for optical engineers.

Recently, the national standard "Optics and Photonics - Optical Elements - Test Methods for Geometric Parameters of Complex Curved Surface Optical Elements," jointly formulated by several domestic research institutions, universities, and leading industry enterprises, will be officially implemented on June 1, 2026. As a high-tech enterprise in China specializing in ultra-precision optical inspection and wavefront measurement technologies, Ningbo Zhixing Optical Technology Co., Ltd. was invited to participate in the drafting and compilation of this national standard, contributing its professional expertise to the standardization of complex curved surface optical inspection in my country.

In today's booming commercial space industry, the speed of satellite constellation deployment has become a lifeline for enterprises. As the preferred choice for high-resolution space remote sensing payloads, off-axis three-mirror array (TMA) systems are being widely adopted due to their advantages such as unobstructed views, long focal length, and high imaging quality. However, while providing superior performance, off-axis TMA systems also present significant challenges to backend assembly. With increasingly tight project cycles and a surge in launch missions, the traditional "experience-driven" assembly and commissioning model is becoming a serious bottleneck restricting production capacity.

In the field of precision optical inspection, computer-generated holograms (CGH) are the "ultimate tool" for inspecting aspherical and freeform surfaces. However, many engineers often feel overwhelmed when they first encounter this complex diffractive optical element: they can't distinguish the signal light from the dense diffraction orders, they can't find the alignment reference, and they can't quickly reproduce the designed pose in an interferometer. Today, we'll break down the complex inspection process into five standardized steps. Just remember these points, and you too can master CGH like an expert.