Interchangeable Lens Guide Layout for Compact Multi-Unit Focusing
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Solution Overview
Problem
Existing optical apparatuses with multiple moving lens units face challenges in achieving miniaturization while maintaining impact resistance and functionality, particularly when three or more lens units are involved.
Innovation Solution
The optical apparatus is designed with a configuration that includes a first, second, and third holding member for lens units, guided by respective guide units, and driven by drive units, arranged in distinct regions around the optical axis to minimize size and enhance impact resistance, utilizing a system of guide members and drive units to maintain precise positioning and movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If three or more lens units are moved for focus adjustment, then the close-range image quality is improved, but the device size increases and impact resistance decreases
Solution Approach 1:
The patent arranges guide members in a three-dimensional configuration around the optical axis, utilizing radial and axial dimensions to position multiple guide members without increasing the overall device volume. This spatial arrangement allows three or more lens units to be moved independently while maintaining a compact form factor.
Solution Approach 2:
The guide members are nested within the lens barrel structure, with each guide member positioned within the radial space of the previous ones. This nested arrangement allows multiple guide members to occupy overlapping radial spaces, minimizing the overall device diameter while accommodating three or more moving lens units.
2Manufacturing precision
If three or more lens units are moved for focus adjustment, then the close-range image quality is improved, but the impact resistance decreases
Solution Approach 1:
The guide members are positioned asymmetrically at different radial distances from the optical axis. This asymmetric arrangement ensures that the center of gravity of the moving lens units aligns with the optical axis, reducing rotational moments during impact and improving impact resistance while maintaining the capability to move three or more lens units for high-quality close-range imaging.
Solution Approach 2:
Different guide members are positioned at different radial distances from the optical axis, with each guide member optimized for its specific position. This local differentiation allows the structure to distribute impact forces more effectively across the lens units, improving overall impact resistance while enabling precise movement of multiple lens units.
3Measurement precision
If multiple guide members are arranged around the optical axis, then the lens movement precision is improved, but the device complexity increases
Solution Approach 1:
Multiple guide members serve dual functions: they guide the axial movement of lens units and simultaneously constrain radial deviations. This multi-functionality allows the same structural elements to provide both precise positioning and stability, reducing the need for additional separate guiding mechanisms and thereby limiting the increase in device complexity.
Solution Approach 2:
The guide members are integrated into the lens barrel and holding member structures, combining the guiding function with the structural support function. This merging of functions reduces the number of separate components needed, simplifying the overall structure while maintaining the precision benefits of having multiple guide members arranged around the optical axis.
Data Source
AI summary
An interchangeable lens comprises a first to a third guide units, and a rear unit base. Each of the first to third guide units includes a pair of guide members including one member and the other member, there are three regions divided in a circumferential direction around the optical axis, a region in which one member of the first guide unit is disposed is defined to as a first region, a region in which one member of the second guide unit is disposed is defined to as a second region, and a region in which one member of the third guide unit is disposed is defined to as a third region. The other member of second guide unit is disposed in first region, the other member of third guide unit is disposed in second region, and the other member of first guide unit is disposed in third region.