Optical Lens Assembly: Film-Coated Sheets for Stray-Light Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
There is a need for an optical lens assembly that balances appearance quality and image quality in portable electronic devices, as existing technologies struggle to achieve both effectively.
Innovation Solution
An optical lens assembly with a lens barrel and optical lens group, incorporating light blocking sheets with specific film layers to control reflectivity and stray light, ensuring a unique visual experience and improved appearance recognition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a light blocking sheet is added to control stray light and improve image quality, then image quality is improved, but the device complexity increases
Solution Approach 1:
A light blocking sheet is introduced as an intermediary component between the lens elements and the image sensor. This sheet selectively blocks stray light paths while allowing useful light to pass through, thereby improving image quality without fundamentally changing the lens structure. The light blocking sheet acts as a mediator that resolves the contradiction by adding a simple, effective element that addresses stray light issues.
Solution Approach 2:
The light blocking sheet is positioned at specific locations within the optical path where stray light interference occurs. By applying the light blocking function only where needed rather than uniformly across the entire optical system, the design improves image quality while minimizing the increase in device complexity. The sheet is strategically placed to block only the harmful stray light paths.
2Shape
If a film layer with specific reflectivity characteristics is applied to the light blocking sheet, then appearance quality is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The film layer on the light blocking sheet is designed with specific reflectivity parameters (Rhigh/R2 ratio between 1.8-6.2) and color index characteristics (CI between 8-41). By carefully controlling these optical parameters, the appearance quality is enhanced with a metallic or gem-like effect. The patent specifies precise parameter ranges that balance aesthetic appearance with manufacturability, allowing standard manufacturing processes to achieve the desired results.
Solution Approach 2:
The light blocking sheet incorporates a film layer that combines light-blocking properties with specific optical reflectivity characteristics. This composite structure integrates the light blocking function with the appearance enhancement function in a single component, avoiding the need for separate layers and reducing manufacturing precision requirements. The film layer is applied directly to the light blocking sheet, creating a unified component that achieves both functional and aesthetic goals.
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 enhances the appearance and image quality of electronic devices by controlling stray light and maintaining consistent color tones, providing a visually appealing and high-quality imaging experience.
Implementation Method 1
A reflected light is obtained from the first film layer irradiated by a standard illuminant D65... the reflected light has a maximum reflectivity in a spectrum in a wavelength range of 380 nm to 780 nm
Data Source
AI summary
An optical lens assembly includes a lens barrel and an optical lens group. The lens barrel includes a light entering hole, which is configured for allowing a light to enter the lens barrel. The lens barrel accommodates the optical lens group, and an optical axis passes through the optical lens group. The optical lens group includes a plurality of lens elements and at least one light blocking sheet. The light blocking sheet is an opaque sheet-shaped element and surrounds the optical axis to form a light passing hole. The light blocking sheet includes an object-side surface and an image-side surface, and the object-side surface is located more adjacent to the light entering hole than the image-side surface thereto. A first film layer is disposed on the object-side surface.