Lens Barrel Adjuster Positioning for Optical Axis Alignment
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Solution Overview
Problem
Existing lens barrels face performance degradation due to positional variations of the lens group holding frame caused by distortion during the mounting process, leading to inaccurate adjustments of the optical axis orientation and position.
Innovation Solution
A lens barrel design that includes an adjuster positioned at an opening portion of the mounting member, allowing for precise adjustment of the optical element's orientation and position with respect to the frame body holding member after the mounting member is attached, minimizing errors and ensuring high accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the mount member is fixed to the fixing cylinder after adjustment, then the mounting structure is secured, but the adjusted position may vary due to member distortion, resulting in performance degradation
Solution Approach 1:
The adjuster is positioned to enable final adjustment actions to be performed after the mount member is fixed to the fixing cylinder. This preliminary positioning of the adjuster allows the optical element's position to be precisely adjusted after mounting, compensating for any distortion that occurs during the mounting process and maintaining adjustment accuracy despite the secured mounting structure.
2Reliability
If the adjuster is positioned inside the mounting member, then the adjustment mechanism is protected, but the adjuster becomes inaccessible for adjustment operations
Solution Approach 1:
The opening portion of the mounting member serves as an intermediary access path. It allows adjustment tools to reach the adjuster mechanism while maintaining the protective enclosure of the mounting member. The opening portion is positioned and sized to provide necessary accessibility for adjustment operations while preserving the protective function of the mounting member structure.
3Ease of operation
If the adjuster is positioned outside the mounting member, then the adjuster is easily accessible, but the adjustment mechanism is exposed to damage and contamination
Solution Approach 1:
The opening portion of the mounting member acts as an intermediary that allows the adjuster to remain positioned within the protected interior space while still being accessible for adjustment operations. This intermediary access path enables the adjuster to enjoy both protection from the mounting member structure and accessibility through the strategically positioned opening.
Data Source
AI summary
In a lens barrel of the present invention, a frame body holding an optical element is held in a frame body holding member, includes an adjuster for adjusting the position of the frame body with respect to a predetermined axis of the frame body holding member so as to be able to adjust at least one of the orientation of an optical axis in the optical element and the position of the optical element in a direction of the optical axis, and the adjuster is arranged at a position adjustable from an opening portion of a mounting member to be mounted on the frame body holding member.