Lens Barrel Light Leakage via Flexible Cable Cover
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In lens barrels with electronic components and flexible cables for power supply, the presence of openings for cable attachment can lead to light leakage, degrading image quality due to the entry of unnecessary light beams.
Innovation Solution
A flexible cable with a three-layer structure, including a conductive copper foil sandwiched between polyimide films, is used to cover at least a part of the opening in the lens holding frame's wall, reducing light leakage by forming a wiring pattern and using anti-reflection films to absorb light, thereby blocking light passage through the openings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If an opening is provided in the lens holding frame for cable attachment, then cable installation workability is improved, but light leakage occurs and image quality deteriorates
Solution Approach 1:
The patent uses a flexible cable with a thin film structure that covers the opening in the lens holding frame. The flexible nature of the cable allows it to conform to the opening while blocking light, thus maintaining both light tightness and ease of cable attachment without requiring a rigid structure
Solution Approach 2:
The cable assembly employs composite material construction with multiple layers including light-blocking material and flexible insulation material. This composite structure enables the cable to simultaneously achieve light blocking functionality and mechanical flexibility for easy installation
2Adaptability or versatility
If a flexible cable is used for power supply, then cable flexibility and ease of connection are improved, but the opening size increases causing more severe light leakage
Solution Approach 1:
The flexible cable is designed with a thin film structure that can bend and adapt to the opening shape. This flexible thin film effectively blocks light while maintaining cable flexibility, allowing the cable to be easily connected without increasing the effective opening size for light leakage
Solution Approach 2:
The cable structure is designed with different properties at different locations - the portion covering the opening uses light-blocking material with specific optical properties, while other portions maintain flexibility for connection. This local differentiation allows the cable to simultaneously block light and provide ease of installation
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 effectively reduces light leakage through the openings, improving image quality by blocking unnecessary light beams while allowing easy cable attachment and enhancing workability, and provides design flexibility for the circumferential wall.
Implementation Method 1
the flexible cable covers at least a part of the opening to block a light passage through the opening
Implementation Method 2
using anti-reflection films to absorb light, thereby blocking light passage through the openings
Data Source
AI summary
A lens barrel includes an optical imaging system having an optical axis and forming an optical image of an object. The lens barrel further includes a frame including a wall extending in the optical axis direction; an electronic component provided in the frame; and a flexible cable electrically connected to the electronic component. An opening is formed in the wall. The flexible cable covers at least a part of the opening to block a light passage through the opening.