Optical Lens Assembly Thermal Compensation Miniaturization

The patent applies parameter changes by optimizing the focal lengths, curvature radii, and thickness parameters of each lens element. Specifically, the first lens has a negative focal length with specific curvature radii for object-side and image-side surfaces, while subsequent lenses have positive focal lengths with optimized parameters. This parameter optimization allows achieving high resolution with a compact six-lens configuration rather than requiring more lenses.

The patent employs composite material design by combining different lens materials with specific refractive indices and Abbe numbers. The first lens uses material with refractive index 1.856 and Abbe number 26.0, while other lenses use materials with varying optical properties. This composite approach enables effective aberration correction and high resolution within a compact form factor.

The patent applies dynamics principle through the aspherical surface design of lens elements. The aspherical surfaces dynamically adjust light ray paths to correct spherical aberration and other optical imperfections, enabling compact optical length while maintaining high resolution. The aspherical coefficients are optimized to balance miniaturization with image quality.

The patent optimizes the parameter ratio TTL/F (total track length to focal length) to achieve miniaturization. By carefully controlling this parameter and other lens parameters such as focal lengths and curvature radii, the patent compresses the optical system length while preserving resolution through precise parameter coordination.

The patent applies local quality principle by selectively using glass material for the first lens element where thermal stability is critical, while other elements may use different materials. The first lens, being a negative meniscus lens with specific curvature, benefits from glass material's superior temperature performance in the critical front element position, while overall system cost is managed through material selection strategy.

The patent uses composite material approach by combining glass and plastic materials in different lens elements. The first lens uses glass material (refractive index 1.856, Abbe number 26.0) for superior temperature performance, while other elements may use plastic materials with optimized refractive indices. This composite strategy balances temperature performance with manufacturing cost across the optical system.

The patent applies merging principle by cementing the fourth and fifth lenses together as a compound lens element. This reduces the number of air-glass interfaces, minimizes reflections and aberrations, and simplifies the overall assembly while maintaining high image quality. The cemented doublet design consolidates two lens functions into a single integrated unit, reducing complexity.

The patent optimizes the focal length distribution and curvature parameters across six lens elements to achieve high image quality without increasing complexity. Each lens element has specifically optimized parameters (focal lengths, curvature radii, thickness) that work synergistically to correct aberrations and produce high-quality images with a compact six-element design.