Lens Module Retaining Member Lambertian Surface Stray Light Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current imaging lenses face challenges in eliminating unnecessary stray light, which degrades imaging quality due to the difficulty in identifying and removing stray light paths during manufacturing.
Innovation Solution
A lens module design incorporating a retaining member with Lambertian surfaces on its inner and outer sides, which diffuses reflection light and reduces interference, improving imaging quality by diffusing incident light and reducing ghost images and sparkles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional lens manufacturing is used without stray light control, then manufacturing process is simple, but imaging quality deteriorates due to stray light interference
Solution Approach 1:
A retaining member is introduced as an intermediary component between the lens group and lens barrel. This retaining member includes a Lambertian surface that acts as a mediator to scatter stray light, preventing it from reaching the image sensor. The Lambertian surface converts directed stray light into diffuse reflection, effectively eliminating ghost images and sparkles without complicating the overall manufacturing process
Solution Approach 2:
The inner side surface of the retaining member is processed with Lambertian treatment, which fundamentally changes the surface optical parameters from specular reflection to diffuse reflection. This parameter change in surface roughness and reflectivity characteristics enables the retaining member to scatter stray light in multiple directions, significantly improving imaging quality by eliminating stray light interference
2Volume of moving object
If lens size is reduced to make imaging lens smaller and thinner, then product compactness improves, but stray light control becomes more difficult
Solution Approach 1:
The retaining member with Lambertian surface serves as a compact intermediary that efficiently scatters stray light within the limited space of a miniaturized lens module. By placing this light-scattering component at the rear of the lens group, stray light is intercepted and diffused before it can cause interference, effectively controlling harmful stray light effects without increasing the overall lens module volume
Solution Approach 2:
Instead of treating the entire lens module with complex stray light control measures, the invention applies Lambertian surface treatment locally only to the inner side surface of the retaining member. This localized application of light-scattering properties at the critical position where stray light intersects with the optical path achieves effective stray light control while maintaining the compact size of the lens module
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 Lambertian processing of the retaining member effectively decreases the energy of reflection light, enhancing the overall imaging quality of the lens module by minimizing optical system interference.
Implementation Method 1
The inner side 34 is a Lambertian surface facing towards an optical axis N through Lambertian processing
Implementation Method 2
diffuses reflection light and reduces interference
Data Source
AI summary
The present disclosure provides a lens module. The lens module includes a lens barrel; a lens group accommodated in the lens barrel, the lens group including at least a first lens; and a retaining member located an image side of the lens group. The retaining member is a hollow ring which includes an object side leaning and connecting to the first lens, an image side opposite to the object side, an outer side and an inner side connecting to the object side and the image side, and the inner side is a Lambertian surface through Lambertian treatment.