Lens Apparatus Eccentric Roller Optical Axis Shift Correction
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Solution Overview
Problem
Existing lens barrel designs require a large number of components and occupy significant space due to the need for reinforcing plates and screws, limiting design flexibility and space efficiency in correcting optical axis shifts.
Innovation Solution
A lens apparatus with a base member and lens holder connected via eccentric rollers and grooves, allowing for efficient adjustment of the optical axis shift without additional screws, thereby reducing size and enhancing design flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a reinforcing plate and multiple screws are used to correct optical axis shift, then the optical axis shift can be corrected, but the total number of component parts increases and design flexibility is limited
Solution Approach 1:
The patent combines the optical axis adjustment function and the lens holder support function into a single integrated base member structure. The grooves and contacting portions are formed directly on the base member, eliminating the need for separate reinforcing plates and multiple screws. This merging of functions reduces the total number of component parts while maintaining the ability to correct optical axis shifts through rotation of the adjusting pin.
2Manufacturing precision
If a reinforcing plate with large space is used, then optical axis shift correction is achieved, but design flexibility of the lens barrel is limited
Solution Approach 1:
The patent transitions from a two-dimensional planar reinforcing plate structure to a three-dimensional integrated base member structure with vertically arranged grooves and contacting portions. This dimensional change allows the adjustment mechanism to be compactly arranged within the base member itself, freeing up lateral space and improving design flexibility of the lens barrel while maintaining optical axis correction capability.
3Manufacturing precision
If the eccentric adjusting pin, washer and screw head are stacked in the optical axis direction, then optical axis shift correction is achieved, but a large space in the optical axis direction is required
Solution Approach 1:
The patent nests the adjusting pin, groove, and contacting portions within each other in a compact arrangement. The adjusting pin rotates within the groove, and the groove is integrated into the base member structure with contacting portions that provide support and positioning. This nested arrangement eliminates the need for stacked components extending in the optical axis direction, significantly reducing the overall length of the lens barrel while maintaining adjustment functionality.
4Strength
If screws extending in the optical axis direction are used, then fastening strength is maintained, but space efficiency is restricted
Solution Approach 1:
The patent extracts the fastening function from the optical axis direction by using the groove structure and contacting portions to provide mechanical support and positioning. The adjusting pin is retained within the groove without requiring extending screws in the optical axis direction. This extraction of the fastening function to a different structural arrangement maintains adequate fastening strength through the groove-constraining mechanism while dramatically improving space efficiency and reducing the overall volume of the lens assembly.
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
The solution enables precise correction of optical axis shifts with improved space efficiency and design flexibility, minimizing the length of components and preventing tilting, thus achieving a more compact and flexible lens apparatus.
Implementation Method 1
the first contacting portion is constituted by an eccentric member being rotatable with respect to the lens holder and including an eccentric portion eccentric with respect to a rotation center of the eccentric member. The eccentric portion contacts the first receiving portion. rotation of the eccentric member changes a position of the lens holder with respect to the base member in a plane orthogonal to the optical axis
Data Source
AI summary
The lens apparatus includes a lens holder holding a first lens, and a base member supporting the lens holder. The lens holder and the base member are connected to each other at connecting portions each including first and second contacting portions provided in the lens holder and first and second receiving portions provided in the base member. The first receiving portion contacts the first contacting portion in a circumferential direction, and the second receiving portion contacts the second contacting portion in an optical axis direction. The first contacting portion is constituted by a rotatable eccentric member including an eccentric portion contacting the first receiving portion. The eccentric member rotates to change a position of the lens holder in an orthogonal-to-optical axis plane. The first and second contacting portions and the first and second receiving portions are respectively circumferentially adjacent.