IPG Header and Lead Coupling for Stable Optical Reflectometry

The patent replaces the traditional metallic IPG case with a non-metallic case (such as PEEK or other biocompatible polymers) to eliminate electromagnetic interference and improve wireless charging efficiency. This substitution allows for more effective electromagnetic coupling between the external charger and the internal coil, significantly reducing recharge time while maintaining device longevity through the use of corrosion-resistant non-metallic materials.

The patent applies a super-ellipse curve design to the IPG case geometry, which features continuously curved surfaces without sharp edges or corners. This curvature eliminates stress concentration points that would otherwise cause tissue erosion and migration. The super-ellipse shape maintains manufacturing feasibility through modern molding techniques while completely eliminating the harmful sharp edges associated with conventional rectangular or cylindrical IPG designs.

The patent implements a nested connector system where the lead connector is inserted into and secured within the IPG header connector. This nested arrangement provides stable mechanical coupling and precise optical alignment between the light source and photodetector components. The connector includes alignment features and securing mechanisms that maintain consistent optical coupling without requiring complex assembly procedures, thus preserving both assembly simplicity and optical signal accuracy.