Fabrication of Ultrathin Polyimide Optical Filter Films

<div class="section abstract"> <div class="htmlview paragraph">Polyimides are a class of polymers with imide rings in their main chains. They are renowned for their exceptional mechanical properties, high-temperature resistance, low-temperature endurance, and resistance to chemical solvents, which allow for long-term use under harsh medical operating conditions. Consequently, research on polyimide films has garnered widespread attention. In this study, a two-step method was employed