Concentrator Photovoltaic Module Housing for Optical Axis Stability

The patent changes the material parameter of the housing from conventional materials to resin materials (PET or PBT) with specific thermal expansion coefficients that match the optical components. This parameter change ensures that the housing expands and contracts at the same rate as the lens and power generating elements during temperature variations, maintaining optical axis alignment accuracy while allowing continuous operation in severe environments.

The patent employs composite material selection by using resin materials (PET or PBT) for the housing that combine appropriate mechanical strength with thermal expansion properties matching the optical components. This composite approach resolves the contradiction by selecting materials whose thermal characteristics harmonize with the optical elements, preventing misalignment while ensuring reliable continuous operation.

The patent implements the self-service principle by designing the housing itself to provide the optical axis confirmation function through integrated confirmation portions. The housing structure includes built-in features that automatically indicate optical axis alignment without requiring separate confirmation devices or complex assembly procedures. This eliminates additional components while maintaining high alignment accuracy, reducing both device complexity and manufacturing costs.

The patent merges the optical axis confirmation function into the housing structure itself by integrating confirmation portions directly into the housing. This consolidation eliminates the need for separate optical axis confirmation members and simplifies the assembly process, achieving high alignment accuracy without increasing device complexity.