In optical module and component packaging, the end-face condition of TOSA, ROSA and single-fiber FA (fiber array) components directly determines the transmission performance of the optical coupling link. Devices with poorly polished end faces, scratches or contamination that flow into coupling and assembly often surface later as high insertion loss or unstable coupling efficiency during final testing. Shenzhen Xingte Technology Co., Ltd. has developed a single-fiber core end-face inspection machine for single-core fiber devices, which uses an optical microscopy system to auto-focus, capture and interpret images automatically, providing a repeatable and traceable inspection workflow.
1. Inspection Targets: TOSA, ROSA and Single-fiber FA
The machine is mainly aimed at single-core fiber devices such as TOSA (transmitter optical sub-assembly), ROSA (receiver optical sub-assembly) and single-fiber FA components. Their end faces consist of the fiber core, cladding and ceramic ferrule, forming small optical interfaces with high precision requirements; any scratch or contamination in the core area can directly affect the optical path. The machine is structured around the geometry and end-face position of single-core devices, so the optical system can consistently align with the area to be inspected.
2. Auto-focus, Image Capture and Interpretation Workflow
During operation, the optical microscopy system first auto-focuses on the device end face to keep the core area sharply in view, then captures the image and hands it to the built-in algorithm for automatic interpretation. The whole focus-capture-analysis sequence runs without manual adjustment part by part, offering high inspection efficiency that suits paced line operation. Automation frees operators from repetitive microscopy and reduces interpretation drift caused by focus shift or viewing angle differences.
3. Defects Covering Core, Cladding and Ferrule Areas
The inspection range covers the core, cladding and ferrule areas of the fiber end face, identifying scratches, pits, chipping and contamination, and assessing end-face polishing quality. Defects in different areas affect the optical path to different degrees: scratches and contamination in the core area usually require tighter control, while flaws on the cladding and ferrule relate to overall end-face cleanliness and appearance. Zone-based inspection makes judgments more targeted and helps process engineers locate polishing or cleaning issues.
4. Configurable Pass/Fail Thresholds
Different products tolerate end-face defects to different degrees. The inspection criteria are configurable, supporting custom Pass/Fail thresholds. Process engineers can set acceptable or rejectable limits for each defect type according to specific device specifications and customer quality requirements, rather than applying a single standard to all products. Once configured, the machine judges each part of a given specification by the same rule, keeping criteria consistent in batch production.
5. Automatic Image Saving and Full-process Traceability
The image and judgment result of every inspection are saved automatically and linked to the device record, enabling full-process quality traceability. When an issue appears in later coupling or final testing, the corresponding end-face inspection image can be retrieved for comparison, to judge whether the problem originated from an end-face defect. Shenzhen Xingte Technology Co., Ltd. provides intelligent equipment such as single-fiber core end-face inspection for quality control before and after optical component assembly, helping customers embed end-face quality control into a traceable line process.
