Lens Barrel Tilt Adjustment via Side Cam Mechanism
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Solution Overview
Problem
Conventional lens barrels with multiple lenses face challenges in making precise tilt adjustments due to limited adjustment points and sensitivity issues, particularly with lenses having large diameters and masses, leading to difficulties in achieving accurate optical axis alignment.
Innovation Solution
The lens barrel incorporates an inclination adjustment mechanism with sliding cams and cam projections that allow independent adjustment of lens inclination along the optical axis, utilizing throughholes and cylindrical cams to facilitate precise tilt adjustments across multiple lenses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If tilt adjustments are made using conventional cam mechanisms from the barrel-axis direction, then adjustments can be made to lenses at the ends of the barrel, but adjustments cannot be made to lenses arranged halfway in the optical axis direction
Solution Approach 1:
The patent introduces a new adjustment direction perpendicular to the optical axis, allowing cam mechanisms to access and adjust lenses from the side rather than only from the barrel-axis direction. This dimensional change enables adjustment of lenses positioned halfway along the optical axis that were previously inaccessible to conventional tilt adjustment mechanisms
2Ease of operation
If tilt adjustments are made using lenses with large diameter and mass, then the photographing object side lens group can be adjusted, but the adjustments become less reliable and flexible
Solution Approach 1:
The patent introduces cam mechanisms as intermediary devices that mediate the adjustment process. These cams provide mechanical leverage and precision, allowing reliable tilt adjustments of heavy lens groups without requiring direct manual manipulation of the large-mass lenses themselves
3Manufacturing precision
If multiple lenses are provided in the lens barrel, then image quality is improved, but the amount of displacement of each lens's optical axis piles up requiring more meticulous adjustments
Solution Approach 1:
The patent divides the adjustment system into multiple independent cam mechanisms, each responsible for adjusting a specific lens's tilt. This segmentation allows each lens to be adjusted independently and precisely, preventing the accumulation of optical axis displacement errors that would occur with fewer, less precise adjustment points
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
This mechanism enables reliable and meticulous tilt adjustments of multiple lenses, improving optical performance by allowing for more flexible and accurate alignment of lenses, even those in the middle of the barrel, thereby enhancing image quality.
Implementation Method 1
the lens barrel has sliding cams, which are disposed in a plurality of places in the lens barrel in the circumferential direction, and which can be moved and adjusted in the circumferential direction, and cam projections, which are disposed in a plurality of places in the lens frame in the circumferential direction
Data Source
AI summary
A number of lenses are provided in a lens barrel along the optical axis direction, and two lenses, among the multiple lenses, are structured so that their inclination can be adjusted independently. Tilt adjustments for a lens frame of one lens, which is arranged on the opening side of the lens barrel in the optical axis direction, can be made through an opening of the lens barrel. The other lens frame of the other lens, which is arranged in the middle of the multiple lenses, is structured so that inclination adjustments can be made through throughholes that are provided to penetrate the peripheral surface of the lens barrel in the diameter direction.