Lens Hood Filter Mount With Independent Rotation and No Vignetting
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Solution Overview
Problem
Existing lens hoods and filters are often incompatible, leading to issues such as vignetting and difficulty in handling large filters, and there is a need for a solution that allows for simultaneous use and independent rotation of multiple filters with a lens hood to enhance light control and reduce image artifacts.
Innovation Solution
A lens hood design with recesses for receiving multiple filters, featuring independent yaw, roll, and pitch rotations, allowing for flexible attachment and rotation of lens filters without vignetting, using mechanisms like hinges, pins, and tracks to enable smooth transitions and compatibility with various lenses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If lens filters are attached to the camera lens, then light control and image quality are improved, but vignetting occurs and handling becomes difficult
Solution Approach 1:
The patent introduces a lens hood as an intermediary device that holds lens filters. Instead of attaching filters directly to the lens, the hood serves as a mediator with a recess that receives the filter. This allows filters to be handled and installed more easily while preventing vignetting, as the hood's structure ensures proper positioning without obstructing the field of view.
2Adaptability or versatility
If multiple lens filters are used simultaneously, then light control capability is enhanced, but device complexity and compatibility issues increase
Solution Approach 1:
The patent divides the filter holding structure into multiple independent recesses within the lens hood. Each recess can accommodate a separate lens filter, allowing multiple filters to be used simultaneously. The hood's structure is segmented to provide individual spaces for each filter while maintaining overall compatibility with the camera lens system.
Solution Approach 2:
The lens hood is designed with universal compatibility features, allowing it to attach to various camera lenses while simultaneously holding multiple different types of lens filters. The hood serves multiple functions: blocking unwanted light, holding multiple filters, and providing a standardized interface for filter installation without requiring lens removal.
3Object-affected harmful factors
If lens hood blocks light, then unwanted light is prevented, but field of view may be obstructed
Solution Approach 1:
The lens hood employs an asymmetric petal-shaped design where the cross-sectional area varies around the circumference. Longer petals are positioned in directions where blocking unwanted light is prioritized, while shorter petals leave more space in other directions to preserve the field of view. This asymmetric configuration allows selective light blocking without uniformly obstructing the imaging area.
Data Source
AI summary
A lens hood system designed to accommodate one or more lens filters via one or more recesses. The lens filters may be inserted through various access points, including front, back, or side openings, and can be secured using methods such as threading, snap-fit tabs, or sliding mechanisms. The lens hood may be equipped with movable frame portions allowing for roll, pitch, and yaw rotations of the filters, independently or collectively, to optimize filter alignment. Additionally, the inner surfaces of the lens hood may be non-reflective or feature designs to minimize unwanted light reflections, enhancing image quality.