Lens Module Serrated Groove Gap Adjustment
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Solution Overview
Problem
Existing lens modules for mixed reality applications face challenges in efficiently adjusting the lens gap to achieve optimal focus and maintain constant resolution during focus adjustments.
Innovation Solution
A lens module design that includes a lens barrel with a movable and fixed barrel, a zoom ring, and a lens gap adjustment member with a sliding portion and bridge portions, which allows for precise adjustment of the lens gap through a serrated sliding groove mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a lens gap adjustment mechanism is added to achieve precise focus adjustments, then focus precision is improved, but device complexity increases
Solution Approach 1:
The lens gap adjustment member is integrated with the zoom ring structure, combining the focus adjustment function with the existing zoom mechanism. The bridge portion connects the sliding portion (attached to zoom ring) and the lens barrel, merging structural support and adjustment functions into a single integrated component rather than separate systems.
Solution Approach 2:
The lens gap adjustment member acts as an intermediary mechanism between the zoom ring and the lens barrel. It translates the rotational movement of the zoom ring into linear movement of the lens barrel, thereby adjusting the lens gap indirectly through this mediating component rather than requiring direct manipulation of the lens elements.
2Stability of the object's composition
If the lens gap adjustment mechanism uses a serrated sliding groove for precise positioning, then focus stability is improved, but manufacturing complexity increases
Solution Approach 1:
The mechanism transitions between two dynamic states: during adjustment, the fixing protrusion slides along the serrated groove allowing continuous movement; during positioning, the protrusion engages with individual serrations to lock at precise intervals. This dynamic behavior provides both adjustability and stable positioning without requiring complex active control systems.
Solution Approach 2:
The serrated groove and fixing protrusion form a self-locking mechanism that automatically maintains focus position without requiring additional actuators or power sources. The mechanical engagement between the serrations and protrusion provides inherent positioning stability, eliminating the need for electronic motors, sensors, or control circuits that would increase manufacturing complexity.
3Productivity
If the lens module uses a movable barrel and fixed barrel configuration for focus adjustment, then focus speed is improved, but device complexity increases
Solution Approach 1:
The lens barrel is divided into a fixed barrel (containing some lens elements) and a movable barrel (containing other lens elements). This segmentation allows the movable barrel to be independently actuated for rapid focus adjustments while the fixed barrel provides stable structural support and housing for stationary components, enabling high-speed focusing without requiring complete lens assembly movement.
Data Source
AI summary
A lens module includes a lens barrel including a plurality of lenses arranged in a first direction, a zoom ring configured to accommodate the lens barrel, and a lens gap adjustment member coupled to the lens barrel and the zoom ring to adjust a gap between the plurality of lenses. The lens barrel and the zoom ring form a sliding groove extending in the first direction to guide a movement of the lens gap adjustment member. The sliding groove includes a serrated portion to which the lens gap adjustment member slidably engages in the first direction.