Six-Lens Optical Module for Slim Mobile Terminals

The patent applies parameter changes by optimizing the refractive powers, curvatures, and thicknesses of each lens element. Specifically, it defines conditional expressions for the refractive powers (e.g., -0.3 < f1/f < -0.1, 0.2 < f2/f < 0.5) and surface curvatures to achieve compact dimensions while maintaining high resolution. The sixth lens is designed with an inflection point on its image-side surface, creating a complex aspherical profile that enhances aberration correction in a shortened optical path.

The patent extensively uses aspherical surfaces with inflection points to reduce optical system length. The sixth lens has an inflection point on its image-side surface, and other lenses have aspherical surfaces with specific curvature constraints (e.g., |r1| > 10mm, |r2| > 10mm). These curved and aspherical surfaces enable better light control and aberration correction in a compact configuration, allowing high resolution without increasing optical path length.

The patent uses aspherical surfaces with inflection points, particularly on the sixth lens's image-side surface, to maintain high resolution in a compact system. The inflection point creates a complex curvature profile that effectively corrects spherical aberration and other distortions, enabling the system to achieve 1300 megapixels resolution despite the shortened optical path of 5.10 mm or less.

The patent optimizes multiple parameters simultaneously: refractive powers of all six lenses, thicknesses of each element, air gaps between lenses, and aspherical surface coefficients. The conditional expressions (e.g., -0.3 < f1/f < -0.1, 0.05 < d1/f < 0.3) ensure that the compact configuration maintains proper aberration correction and image quality, achieving both short length and high resolution.

The patent manages complexity by defining specific parameter ranges for each lens element. The six lenses have constrained refractive powers (e.g., -0.3 < f1/f < -0.1, 0.2 < f2/f < 0.5), thicknesses (e.g., 0.3 < d1/f < 0.6, 0.1 < d2/f < 0.4), and curvature radii. These standardized parameter ranges enable systematic design and manufacturing while achieving effective aberration correction for high-resolution imaging.

The patent uses aspherical surfaces with inflection points strategically placed on specific lenses (particularly the sixth lens) to enhance aberration correction without adding more lens elements. The inflection point geometry provides superior correction of spherical aberration and field curvature, allowing the six-lens system to achieve 1300 megapixels resolution with effective aberration control while maintaining manageable complexity.