Multi-Lens Optical System Low-Light Aperture Design

The patent applies parameter changes by optimizing the focal lengths, refractive powers, and spacing of multiple lens elements (first lens L1 through eighth lens L8) to achieve a balanced optical system. The specific arrangement of positive and negative power lenses, along with the conditional relationships between focal lengths (e.g., f1>0, f8<0, and specific ratio constraints), enables the system to maintain large aperture capabilities while controlling overall size and complexity

The optical system is segmented into multiple discrete lens elements (eight lenses total) with different refractive powers and surface curvatures. This segmentation allows each lens to contribute specifically to aberration correction and light gathering, enabling the system to achieve high performance in low-light conditions without requiring a single oversized aperture element

The patent divides the optical system into eight distinct lens elements (L1-L8) with specific refractive power assignments (positive for L1, L3, L4, L6; negative for L2, L5, L7, L8). Each lens element is optimized for specific aberration correction tasks, allowing the system to achieve high image definition through distributed functional specialization rather than relying on fewer, more complex elements

Different regions of the optical system are assigned different functional qualities: the first lens (L1) with positive power handles initial light convergence, intermediate lenses (L2-L7) with alternating positive and negative powers correct specific aberrations in their respective zones, and the eighth lens (L8) with negative power provides final aberration control. This local optimization of each lens element's properties contributes to overall high image quality