Camera Lens Assembly Using Separating Pieces for Stray Light Control
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Solution Overview
Problem
Existing camera lens assemblies face challenges in controlling the spacing distance and thickness of lenses, leading to increased sensitivity and adverse effects such as stray light, which affect imaging quality.
Innovation Solution
The optical camera lens assembly comprises six lenses with specific refractive powers, separated by multiple separating pieces, which are carefully arranged within a lens barrel to satisfy specific optical parameters, including spacing distances, thicknesses, and focal lengths, to reduce sensitivity and stray light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the spacing distance and thickness of lenses are not properly controlled, then the lens assembly can be simpler to manufacture, but the sensitivity increases and imaging quality deteriorates due to stray light effects
Solution Approach 1:
The patent introduces separating pieces as intermediary elements positioned between adjacent lenses. These separating pieces serve as mediators that precisely define and maintain the spacing distances between lenses, converting a complex precision spacing requirement into a simpler assembly process where the separating pieces physically determine the gaps. This resolves the contradiction by making the spacing control inherent to the structure rather than requiring precise manufacturing tolerances.
Solution Approach 2:
The separating pieces are pre-designed with specific thicknesses that correspond to the required spacing distances between lenses. By preparing these spacing elements in advance with precise dimensions, the patent eliminates the need for complex real-time spacing adjustments during assembly. The preliminary preparation of spacing components transforms a precision manufacturing challenge into a straightforward assembly task.
2Object-affected harmful factors
If the spacing distance between lenses is increased to reduce sensitivity, then stray light effects are reduced, but the overall lens assembly length increases
Solution Approach 1:
The patent optimizes the thickness parameters of the separating pieces to achieve the minimum effective spacing that reduces stray light while minimizing the overall length contribution. By carefully selecting and adjusting the spacing parameters, the patent finds the optimal balance between reducing harmful stray light effects and controlling the total assembly length, rather than simply increasing all spacing distances.
3Manufacturing precision
If multiple separating pieces are added to control spacing and reduce stray light, then imaging quality improves, but the device complexity increases
Solution Approach 1:
The patent divides the lens assembly into discrete segments with separating pieces positioned between individual lenses. This segmentation approach allows each separating piece to independently control the spacing for its adjacent lenses, simplifying the overall design logic. Instead of a complex continuous adjustment mechanism, the assembly uses multiple simple identical components (separating pieces) that can be independently positioned and secured.
Solution Approach 2:
The separating pieces are designed as universal components that serve multiple functions: they define spacing distances, block stray light paths, and provide structural support between lenses. By making each separating piece multi-functional, the patent reduces the total number of different component types needed, thereby reducing overall device complexity while maintaining precise control over imaging parameters.
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
This design enhances the control over the thicknesses and imaging quality of the fifth and sixth lenses, improves the stability of lens assembly near the image plane, and reduces the impact of stray light, resulting in improved overall image quality.
Implementation Method 1
a lens group, a plurality of separating pieces, and a lens barrel that is used to accommodate the lens group and the plurality of separating pieces. The lens group is composed of six lenses having refractive powers
Data Source
AI summary
An optical camera lens assembly is provided. The optical camera lens assembly comprises a lens group, a plurality of separating pieces, and a lens barrel used to accommodate the lens group and the plurality of separating pieces. The lens group is composed of six lenses having a refractive power, and comprises, sequentially along an optical axis from an object side to an image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens that have a refractive power. The plurality of separating pieces comprise a first separating piece, a second separating piece, a third separating piece, a fourth separating piece and a fifth separating piece. The optical camera lens assembly may satisfy: 10<(EP45+CP5)/T56<40.0, 0<d5s/f5<1.0 and 0<d5s/f6<1.0.