Six-Lens Optical Imaging Lens with Variable Air Gaps
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Solution Overview
Problem
The challenge is to design an optical imaging lens that is lightweight, thin, small, and capable of macro focusing with an infinite object distance, while maintaining excellent imaging quality and minimizing space, as existing multi-lens systems face issues with discontinuation of images when switching between different functions.
Innovation Solution
A six-lens optical imaging lens configuration with specific refracting powers and surface shapes, allowing for variable air gaps to form different focusing states, ensuring the lens is light, thin, and small, with a design that includes a first lens element with positive refracting power, and a sixth lens element with a concave optical axis region and convex periphery region, satisfying conditions such as TTL*ΔHFOV/ΔG≤19.500 degrees.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple lenses are arranged to meet different photographic needs, then functional versatility is improved, but device size and complexity increase
Solution Approach 1:
The patent implements a single lens system that performs multiple photographic functions including macro focusing, infinity focusing, and variable aperture control. The lens achieves this through a multi-element design (at least 6 lens elements) with specific power distribution and movable components that can adjust focal length and aperture dynamically, eliminating the need for separate specialized lenses
2Measurement precision
If multiple lenses with different functions are used, then imaging quality is improved, but image discontinuation occurs during function switching
Solution Approach 1:
The patent employs dynamic adjustment mechanisms within a single lens system, including movable lens elements for focusing and a variable aperture stop that can continuously adjust opening size. This dynamic capability allows seamless transition between different photographic modes (macro, infinity, various apertures) without discrete switching, ensuring continuous image capture and eliminating image discontinuation issues
Solution Approach 2:
By designing a single lens system capable of performing multiple functions through internal adjustments rather than external lens switching, the patent ensures uninterrupted imaging. The lens can adapt its optical parameters (focal length, aperture, focus distance) to meet different photographic needs while maintaining continuous operation
3Volume of stationary object
If lens structure is simplified to reduce size, then device compactness is improved, but optical performance deteriorates
Solution Approach 1:
The patent divides the lens system into multiple discrete elements (at least 6 elements) with specific optical powers and functions. This segmentation allows each element to be optimized for its specific role while collectively achieving compact overall size. The divided structure enables better control of optical aberrations and more efficient use of space compared to a single large lens
Solution Approach 2:
The patent utilizes aspheric surfaces with specific mathematical parameters (aspheric coefficients) to optimize optical performance within a compact form. By carefully controlling parameters such as curvature, thickness, and refractive index of each lens element, the design achieves high imaging quality while maintaining a small overall footprint
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 solution enables the optical imaging lens to maintain excellent imaging quality, achieve macro focusing, and reduce volume, while ensuring good optical performance across varying object distances, effectively addressing the limitations of existing systems.
Implementation Method 1
Each of the first lens element, the second lens element, the third lens element, the fourth lens element, the fifth lens element and the sixth lens element respectively has an object-side surface which faces toward the object side and allows imaging rays to pass through as well as an image-side surface which faces toward the image side and allows the imaging rays to pass through
Data Source
AI summary
An optical imaging lens includes a first lens to a sixth lens and correspondingly forms a first focusing state and a second focusing state. The first lens element has positive refracting power, a periphery region of the image-side surface of a fifth lens element is concave, an optical axis region of the image-side surface of the sixth lens element is concave, a periphery region of the image-side surface of the sixth lens element is convex. Lens elements included by the optical imaging lens are only six lens elements. The rear lens group enables the optical imaging lens to form a first focusing state and a second focusing state to satisfy TTL*ΔHFOV/ΔG≤19.500 degrees.