Lens Device Optical Axis Adjustment Mechanism
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Solution Overview
Problem
Existing lens devices face challenges in easily performing optical axis adjustments and reducing the size and weight of the device.
Innovation Solution
A lens device comprising a first and second lens frame, first and second adjustment mechanisms, and a stop mechanism, where the adjustment mechanisms allow for eccentricity and inclination adjustments of the lens frames to align optical axes, and the stop mechanism maintains the position of the lens group.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If complex adjustment mechanisms are used to perform optical axis adjustment, then adjustment precision is improved, but device complexity and size increase
Solution Approach 1:
The adjustment mechanism is divided into two independent parts: a first adjustment mechanism for adjusting the first lens frame and a second adjustment mechanism for adjusting the second lens frame. Each mechanism handles specific adjustment tasks separately, simplifying the overall system while maintaining precision.
Solution Approach 2:
The adjustment mechanisms utilize the lens frames' own structures (chord portions) as adjustment elements. The first and second chord portions directly engage with the adjustment mechanisms, eliminating the need for separate complex adjustment components and reducing overall device complexity.
2Ease of operation
If traditional adjustment mechanisms are used, then optical axis adjustment capability is achieved, but device size and weight increase
Solution Approach 1:
The adjustment mechanisms are integrated into the lens frame structures themselves. The first and second chord portions of the lens frames serve dual purposes: structural support and adjustment engagement. This merging eliminates separate adjustment components, reducing device weight while maintaining adjustment capability.
Solution Approach 2:
The chord portions of the lens frames perform multiple functions: they provide structural integrity to the lens frames and simultaneously serve as engagement elements for the adjustment mechanisms. This multi-functionality reduces the number of separate components needed, thereby reducing overall device weight.
3Measurement precision
If multiple adjustment mechanisms are added to both lens frames, then adjustment precision is improved, but device complexity increases
Solution Approach 1:
The adjustment system is segmented into two specialized mechanisms: the first adjustment mechanism handles the first lens frame's optical axis alignment, while the second adjustment mechanism handles the second lens frame's alignment. This segmentation allows each mechanism to be optimized for its specific task with simpler design.
Solution Approach 2:
Each lens frame's chord portion is specifically designed for its local adjustment needs. The first chord portion engages with the first adjustment mechanism for first lens frame adjustment, while the second chord portion engages with the second adjustment mechanism for second lens frame adjustment. This localized design improves precision without requiring a unified complex mechanism.
Data Source
AI summary
A lens device includes a first lens frame that holds a first lens and that includes a first chord portion, a second lens frame that holds a second lens and that includes a second chord portion, a first adjustment mechanism that performs first adjustment of the first lens frame, a second adjustment mechanism that performs second adjustment of the first lens frame and the second lens frame, and a stop mechanism. The first adjustment mechanism and the second adjustment mechanism are disposed at positions that are closer to an image plane side than a first position is and closer to an objective side than the stop mechanism is, the first position being a position at which a second surface and a first optical axis of the first lens intersect each other, and a position of the stop mechanism in an optical axis direction is fixed.