Three-Group Lens Assembly for UAV Miniaturization

The lens assembly is divided into three distinct lens groups (first lens group with positive refractive power, second lens group with negative refractive power, and third lens group with positive refractive power), each containing multiple lenses with specific configurations. This segmentation allows for optimized optical performance while controlling the overall length by distributing the refractive function across multiple compact groups rather than using a single long optical path.

The patent employs specific parameter configurations including the refractive power relationships between adjacent lenses (opposite refractive powers), specific lens surface shapes (convex surfaces facing object side, concave surfaces facing image side), and the inclusion of meniscus lenses in specific positions. These parameter changes enable high resolution while maintaining a compact total lens length by optimizing the optical path efficiency.

By segmenting the optical system into three functional lens groups with specific refractive power distributions, the patent achieves compact volume while maintaining optical performance. The first lens group (positive power) provides initial convergence, the second lens group (negative power) provides divergence and correction, and the third lens group (positive power) provides final convergence, creating an efficient compact optical path that preserves image quality.

Each lens group and individual lens is designed with specific local characteristics - the first lens group has positive refractive power with specific surface configurations, the second lens group has negative refractive power with meniscus lenses, and the third lens group has positive refractive power with specific convex-concave surface arrangements. These localized quality optimizations ensure that each component contributes maximally to the overall optical performance within the miniaturized volume.