Adjustable Polarizing ND Filter with Elastic Axial Securement
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Solution Overview
Problem
Conventional polarizing ND filters require multiple filters of different specifications for varying light conditions, leading to inconvenience, financial burden, and instability in maintaining desired light reduction levels due to independent ring rotation, which can result in unintended adjustments.
Innovation Solution
An adjustable multiple-ring polarizing ND filter assembly with an elastic engaging member for axial ring securement, allowing for stable unison rotation of polarizing lenses or independent adjustment of light reduction, ensuring consistent light reduction and ease of use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple ND filters of different specifications are used to deal with varying light intensities, then the adaptability to different shooting environments is improved, but the device complexity and inconvenience of carrying multiple filters increase
Solution Approach 1:
The patent combines multiple ND filters with different light reduction specifications into a single integrated filter assembly. The assembly includes a first ND filter and a second ND filter mounted together on a common structure, allowing both filters to be attached to and removed from the camera lens as one unit. This merging eliminates the need to carry and mount multiple separate filters, reducing complexity while maintaining adaptability to different lighting conditions.
Solution Approach 2:
The filter assembly is designed to perform multiple functions simultaneously - it can operate with either the first ND filter, the second ND filter, or both filters together, providing universal applicability across various light intensity conditions. The assembly acts as a multi-functional unit that replaces multiple single-function filters, enhancing versatility while simplifying the overall system.
2Ease of operation
If polarizing filters are rotated independently to adjust light reduction, then the ease of operation for adjusting polarization is improved, but the stability of maintaining desired light reduction levels deteriorates due to unintended adjustments
Solution Approach 1:
The filter assembly is segmented into functionally independent but structurally integrated components - the first ND filter and the second ND filter are mounted on separate rotatable structures within the same assembly. This segmentation allows each filter to be adjusted independently for its specific function (polarization and light reduction) while the overall assembly structure prevents unintended interactions between the two adjustment mechanisms, maintaining stability.
Solution Approach 2:
The patent introduces an intermediary coupling mechanism between the first ND filter and the second ND filter that allows independent rotation while preventing unintended adjustments. This intermediary structure acts as a mediator that decouples the rotational movements, enabling ease of operation for each filter while maintaining the stability of the other filter's position and light reduction level.
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
Enhances convenience, accuracy, and stability by allowing photographers to maintain desired light reduction levels and polarizing effects, reducing the need for multiple filters and minimizing accidental adjustments.
Implementation Method 1
the elastic engaging member has a free end that can extend out of the receiving groove and retract into the receiving groove when subjected to an external force
Implementation Method 2
A polarizing filter, on the other hand, is a filter constructed on the principle of polarization of light and includes grate-like crystals arranged in a parallel manner
Data Source
AI summary
An adjustable multiple-ring polarizing neutral-density filter assembly with an elastic engaging member for axial ring securement includes a fixedly connecting ring and a first pivotally connecting ring. The fixedly connecting ring is mounted with a polarizing lens and has a first end threadedly connectable to a camera lens and an opposite second end axially provided with a receiving groove. The elastic engaging member is mounted in the receiving groove and has a free end extending out of or forced into the receiving groove. The first pivotally connecting ring is mounted with another polarizing lens and has one end pivotally connected to the second end of the fixedly connecting ring and circumferentially provided with an engaging portion. The free end of the elastic engaging member can press against the bottom wall of any of the engaging recesses in the engaging portion to maintain the corresponding light-reducing effect while being shaken.