High-resolution optical and electro-optical microscopy for PV- modules

摘要

Non-destructive methods for high-resolution inspection are of great importance for quality assurance, reliability assessment and for research and development. Especially for samples like solar modules or large specimens high-resolution microscopy measurements are not used and therefore observable details are strongly limited by the optical resolution. Small defects can grow and cause a reduction of the module's lifetime. A portal-based inspection system has been set up for large samples like a PV-module or any other large sample. It can be equipped with several optical systems like cameras or a microscope. The optical properties are optimized for visual or for electroluminescence imaging on a macroscopic and microscopic scale and complements an existing Dark Lock-In Thermography (DLIT) setup for modules.