Dual-Axis Optical Lens Assembly for Compact Long-Focal Imaging
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Solution Overview
Problem
Conventional photographing modules in mobile devices face challenges in achieving miniaturization with long focal lengths and high image quality, particularly due to increased size and complexity with optical zoom functions.
Innovation Solution
An optical lens assembly with a first and second element group and a light guide element, where specific conditions such as 0.65<CTL/IMH<1.61 and −0.9<f1/f<0 are satisfied, allowing for reduced size and enhanced image quality by minimizing deflection angles and optical distortions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the zoom magnification increases to achieve optical zoom function, then the image quality and resolution are improved, but the total length of the photographing module increases making the device more cumbersome
Solution Approach 1:
The patent employs a nested optical structure where the first and second element groups are arranged along parallel optical axes with a light guide element positioned between them. This nested configuration allows the optical components to be compactly integrated, achieving long focal length and optical zoom functionality without proportionally increasing the overall module length, thus resolving the contradiction between image resolution and module size.
Solution Approach 2:
The patent transitions from a single optical axis arrangement to a dual parallel optical axis configuration. By distributing optical elements across two parallel dimensions (first and second optical axes) and using a light guide element to transfer images between these dimensions, the design achieves long focal length and zoom capability while maintaining a compact form factor that would not be possible with traditional single-axis arrangements.
2Length of stationary object
If more optical elements are added to achieve long focal length, then the focal length is increased, but the device complexity and size increase
Solution Approach 1:
The patent divides the optical system into two distinct element groups (first element group with four lenses and second element group with optical filter) arranged along parallel optical axes. This segmentation allows each group to be optimized independently for its specific function while contributing to the overall long focal length, reducing the complexity that would arise from a single large complex assembly.
Solution Approach 2:
The light guide element serves as an intermediary between the first and second element groups, transferring the image formed by the first group to the second group. This intermediary component enables the system to achieve long focal length without requiring all optical elements to be arranged in a single linear sequence, thereby reducing overall complexity and allowing for more efficient spatial arrangement.
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 optical lens assembly effectively reduces overall size while maintaining high image quality and functionality, suitable for use in extreme temperatures when the first lens is made of glass.
Implementation Method 1
a light guide element passed through by the first and second optical axes, and the first and second element groups located on the same side of the light guide element. The light guide element allows light to transmit from the first element group along the first optical axis to the second element group along the second optical axis via
Implementation Method 2
a first element group located on an object side of the optical lens assembly; a second element group located on an image side of the optical lens assembly. The first element group is disposed along the first optical axis and includes, in order from the object side to the image side: a first lens with positive refractive power, a second lens with refractive power, a third lens with refractive power, and a fourth lens with positive refractive
Data Source
AI summary
An optical lens assembly with a first optical axis and a second optical axis parallel to the first optical axis, includes a first element group located on an object side of the optical lens assembly; a second element group located on an image side of the optical lens assembly; and a light guide element disposed at the position where the first and second optical axes pass. The first and second element groups being located on the same side of the light guide element. The optical lens assembly has a long focal length, a compact size and a relatively higher illumination when satisfying a specific condition.