Annular Light Trap Structure for Lens Module Stray Light Control
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Solution Overview
Problem
Conventional optical systems fail to effectively eliminate stray light, leading to halo effects in images due to unwanted light entering the image sensor, particularly in environments with varying light conditions.
Innovation Solution
An annular light trapping component with L-shaped annular grooves and stripe-shaped structures is integrated into the optical lens assembly, designed to capture and trap unwanted light rays, improving image quality by preventing stray light entry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional optical systems are used, then the structure is simple, but stray light cannot be effectively eliminated causing halo effects
Solution Approach 1:
The optical system is segmented by adding a separate light trapping component with L-shaped annular grooves and stripe-shaped structures, distinct from the main lens assembly. This segmentation allows the stray light elimination function to be independently optimized without redesigning the entire optical system, resolving the contradiction between effective stray light elimination and structural simplicity.
Solution Approach 2:
A light trapping component serves as an intermediary element positioned between the lens assembly and image sensor. This mediator component with L-shaped grooves and stripe structures intercepts stray light before it reaches the sensor, effectively eliminating halo effects while maintaining the original lens design, thus resolving the contradiction between stray light elimination and structural complexity.
2Reliability
If the image sensor receives unwanted light, then the optical system structure remains simple, but image quality deteriorates due to halo effects
Solution Approach 1:
The light trapping component performs preliminary action by intercepting and trapping stray light before it can reach the image sensor and cause halo effects. The L-shaped annular grooves and stripe-shaped structures are positioned to preemptively capture unwanted light rays, ensuring high image quality while adding minimal structural complexity to the optical system.
3Illumination intensity
If powerful light sources exist in the environment, then the lighting conditions provide sufficient illumination, but stray light enters the optical system causing halo effects
Solution Approach 1:
The light trapping component converts the harmful effect of powerful environmental light sources into a manageable situation by intercepting stray light rays before they enter the optical system. The L-shaped grooves and stripe structures trap these otherwise harmful light rays, allowing the optical system to benefit from strong illumination while eliminating stray light interference that would cause halo effects.
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 annular light trapping component enhances image quality by effectively capturing and blocking stray light, ensuring high-quality images in diverse lighting conditions.
Implementation Method 1
The L-shaped annular grooves include a first side and a second side connected to each other. The stripe-shaped structures are disposed on either the first side or the second side, and a degree of inclination between the first side and the central axis is larger than a degree of inclination between the second side and the central axis.
Data Source
AI summary
An annular light trapping component includes an inner surface, an outer surface, an object-side surface and an image-side surface. The inner surface includes multiple L-shaped annular grooves. The annular light trapping component includes multiple stripe-shaped structures in the L-shaped annular grooves. The L-shaped annular grooves include an object-side L-shaped annular groove closest to the object-side surface and an image-side L-shaped annular groove closest to the image-side surface. A bottom diameter of the image-side L-shaped annular groove is larger than a bottom diameter of the object-side L-shaped annular groove. Each L-shaped annular groove includes a first side and a second side located between the object-side surface and the image-side surface. The stripe-shaped structures are disposed on the first side or the second side. A degree of inclination between the first side and the central axis is larger than a degree of inclination between the second side and the central axis.