Optical Imaging Lens Group With Variable-Curvature Autofocus
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Solution Overview
Problem
Existing mobile phone cameras, particularly front cameras, often have fixed-focus lens assembly structures that hinder optimal image capture in varying shooting scenarios, necessitating an autofocus function for improved imaging quality.
Innovation Solution
An optical imaging lens group with a variable radius of curvature and adjustable intervals between lenses, incorporating an autofocus component with a light-transmitting module, liquid material, and flexible film, allows for autofocus adjustment based on object distance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a fixed-focus lens assembly structure is used, then the device complexity is reduced, but the adaptability to different shooting scenarios deteriorates
Solution Approach 1:
The patent applies the dynamics principle by making the lens assembly movable along the optical axis through a driving mechanism. The lens can dynamically adjust its position between a first position (for distant objects) and a second position (for close-up objects), transforming a static fixed-focus structure into a dynamic autofocus system that adapts to different shooting scenarios.
2Reliability
If the number of lenses is increased to improve imaging quality, then the imaging performance is improved, but the device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the lens assembly into multiple independent lens elements (first lens, second lens, third lens, and fourth lens) with different optical powers. Each lens element can be independently designed and positioned, allowing the system to achieve complex imaging functions while maintaining manageable structural complexity through modular design.
Solution Approach 2:
The patent makes the entire lens assembly multi-functional by enabling it to serve multiple purposes: capturing distant scenes in the first position and close-up macro shots in the second position. This universal design allows a single lens assembly structure to handle various shooting scenarios without requiring separate dedicated lenses for each function.
3Adaptability or versatility
If the focal length is varied for autofocus, then the adaptability to different object distances is improved, but the device complexity increases
Solution Approach 1:
The patent replaces complex optical mechanisms (such as moving multiple individual lenses or using complex lens groups) with a simpler mechanical system that moves the entire lens assembly as a unified unit. This substitution simplifies the autofocus mechanism by using a single driving mechanism to achieve focal length variation, reducing the overall device complexity while maintaining adaptability.
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 group achieves stable image quality, miniaturization, and high imaging performance through optimized refractive power distribution and autofocus functionality, reducing sensitivity and aberrations.
Implementation Method 1
a radius of curvature of an image-side surface of the liquid material and a shape of the flexible film are variable
Data Source
AI summary
An optical imaging lens group, along an optical axis from an object side to an image side, sequentially includes: an autofocus component, a first lens, a second lens, a third lens, a fourth lens, and at least one subsequent lens. A radius of curvature of an image-side surface of the autofocus component is variable; and there is an interval between each two adjacent lenses among the first lens to the at least one subsequent lens.