Super Wide Angle Zoom Lens with Four-Lens Segmentation

The optical system is segmented into four specific lenses with different materials and functions. The first and fourth lenses use high-refractive-index glass for efficient light gathering, the second lens uses flint glass for chromatic aberration correction, and the third lens uses plastic for cost reduction while maintaining optical performance. This segmentation allows each component to optimize for its specific function, resolving the contradiction between cost and efficiency.

The patent employs composite material construction with multiple glass types (high refractive index glass, flint glass) and plastic materials with specific Abbe numbers. This composite approach allows the system to achieve high light transmission efficiency through strategic material selection while controlling manufacturing costs by using plastic for the third lens and glass only where optically critical.

The optical system is divided into four functionally distinct lenses rather than using a single complex lens or fewer lenses. This segmentation into specialized components (first lens for light gathering, second lens for chromatic correction, third lens for field curvature correction, fourth lens for final focusing) achieves high transmission efficiency while maintaining manageable structural complexity.

Each lens in the four-lens system performs multiple functions: the first lens contributes to both light gathering and initial focusing, the second lens corrects chromatic aberration while maintaining image quality, the third lens corrects field curvature and contributes to overall focusing, and the fourth lens provides final image formation. This multi-functionality allows the system to achieve high efficiency with a relatively simple four-lens structure.