This chapter focuses on the integration of secondary reflectors in Parabolic Solar Trough Collectors (PTCs) as a strategy to overcome key optical inefficiencies. It examines the design and construction of secondary reflectors aimed at improving beam concentration and ensuring more uniform heat flux distribution along the receiver surface. Uneven heating in traditional PTC designs can lead to thermal stress, material fatigue, and reduced system lifespan—challenges this chapter addresses in detail. By analyzing the impact of secondary reflectors on thermal and optical performance, the chapter highlights their potential to enhance overall system efficiency. It also explores the technical trade-offs involved, balancing design complexity with performance gains. This discussion offers valuable insight into the optimization of PTC systems for more reliable and effective solar thermal energy conversion.