Five-Lens Imaging System with Inflection Point for Compact High Resolution

The patent applies parameter changes by optimizing the refractive powers, curvature radii, and axial positions of each lens element. Specifically, it defines precise relationships between focal lengths (f1, f2, f3, f4, f5), curvature radii (R1 through R10), and axial positions that enable high imaging performance while controlling total length. The fifth lens is designed with specific meniscus shape parameters and inflection points to achieve compact configuration.

The imaging lens is segmented into five distinct lens elements with alternating positive and negative refractive powers. This segmentation allows each element to contribute differently to the overall optical performance, enabling correction of various aberrations while maintaining a compact total length. The division into specific groups (first through fifth lenses) with defined characteristics facilitates optimized light path management.

Rather than simple proportionate enlargement, the patent employs sophisticated parameter changes including specific relationships between focal lengths (e.g., f2/f1 ratios, f4/f5 ratios), curvature radii proportions, and axial positioning. The fifth lens is designed with specific meniscus shape parameters and inflection points that enable the system to accommodate larger imaging elements without linearly increasing total length.

The patent addresses the scaling problem by introducing dimensional optimization through the fifth lens with specific meniscus shape and inflection points. This allows the system to scale for larger imaging elements while controlling length through optimized spatial arrangement and curvature relationships rather than simple proportional scaling.