Eight-Element Camera Optical Lens for Wide-Angle Imaging
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Solution Overview
Problem
There is an urgent need for a wide-angle imaging lens with excellent optical characteristics, small size, and fully corrected aberrations to meet the increasing demand for miniaturized camera optics in handheld devices with high image quality.
Innovation Solution
A camera optical lens design comprising eight lenses, each with specific refractive powers, surface curvatures, and thicknesses, optimized to achieve a field of view between 100.00° and 135.00°, focal length ratios, and curvature radius ratios, ensuring wide-angle performance and ultra-thin design with reduced aberrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a multi-piece lens structure is used to improve imaging quality, then image quality is improved, but device complexity and size increase
Solution Approach 1:
The optical lens system is divided into eight individual lens elements with specific refractive powers and surface curvatures. Each lens element (first lens through eighth lens) is independently designed and positioned along the optical axis, allowing for precise correction of various optical aberrations while maintaining a manageable structural complexity through systematic segmentation of the optical function.
2Volume of moving object
If the pixel area of the photosensitive device shrinks to achieve miniaturization, then device size is reduced, but imaging quality deteriorates
Solution Approach 1:
The patent specifies precise parameter ranges for the optical system including field of view (100.00°≤FOV≤135.00°), focal length ratios (−3.20≤f1/f≤−1.00), and curvature radius ratios (2.30≤R15/R16≤5.00). These parameter optimizations enable the lens system to maintain excellent imaging quality with wide-angle performance while being miniaturized for handheld devices, directly addressing the contradiction between size reduction and quality maintenance.
3Adaptability or versatility
If a wide-angle lens design is implemented to increase field of view, then FOV is improved, but optical aberrations increase
Solution Approach 1:
Different lens elements are assigned specific local functions to correct particular types of aberrations. The first lens has negative refractive power for wide-angle correction, the fifth lens has negative refractive power for aberration control, and subsequent lenses have specific convex/concave surface configurations. This localized optimization of each lens element's properties enables comprehensive aberration correction across the wide field of view range.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The lens design achieves a wide-angle effect with improved imaging quality, reduced aberrations, and a compact form factor suitable for handheld devices like smartphones and digital cameras, while maintaining a large aperture for better light capture.
Implementation Method 1
a first lens having a negative refractive power, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens
Data Source
AI summary
The present invention discloses a camera optical lens, including from an object side to an image side in sequence: a first lens having a negative refractive power, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens; wherein the camera optical lens satisfies the following conditions: 100.00°FOV135.00°, −3.20f1/f−1.00, and 2.30R15/R165.00. FOV denotes a field of view of the camera optical lens in a diagonal direction. F denotes a focal length of the camera optical lens. f1 denotes a focal length of the first lens. R15 denotes a central curvature radius of an object side surface of the eighth lens. R16 denotes a central curvature radius of an image side surface of the eighth lens. The camera optical lens according to the present invention has a wide-angle effect.