Motor Drive Apparatus Optical Axis Alignment
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Solution Overview
Problem
Conventional motor drive apparatuses for optical imaging diagnostics face challenges in accurately adjusting the optical axis between collimator lenses, leading to signal loss due to adhesive-related deviations and inability to fine-tune after initial fixation.
Innovation Solution
A motor drive apparatus with a tubular lens holding member and a holding member fixing mechanism that allows for precise adjustment of collimator lenses, featuring curved and perpendicular fixation surfaces for accurate alignment and stabilization of optical axes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a collimator lens is fixed using an adhesive agent to a hollow tubular member, then the lens can be securely attached, but the optical axis deviates due to hardening and shrinkage of the adhesive agent
Solution Approach 1:
The patent removes the adhesive agent from the fixation process entirely. Instead of using chemical bonding, the collimator lens is held in position by a holding member with a through-hole that mechanically retains the lens without any adhesive, thereby eliminating the source of optical axis deviation caused by adhesive hardening and shrinkage.
Solution Approach 2:
The patent introduces a holding member as an intermediary component between the collimator lens and the hollow tubular member. This holding member serves as a mediator that secures the lens in the correct position without direct adhesive bonding to the tubular member, thus maintaining optical axis precision while providing secure fixation.
2Ease of manufacture
If the collimator lens is fixed to the tubular member using adhesive, then initial positioning can be achieved, but fine-adjustment of the optical axis center and angle becomes difficult afterward
Solution Approach 1:
The patent creates a dynamic, adjustable fixation system where the holding member can be positioned at different locations along the hollow tubular member. This allows the optical axis center and angle to be fine-adjusted by changing the position of the holding member, transforming a static adhesive bond into a dynamically adjustable mechanical retention system.
Solution Approach 2:
The patent segments the fixation system into separate functional components: the holding member that retains the lens, the hollow tubular member that provides structural support, and the adjustable positioning mechanism. This segmentation allows independent optimization of each component's function, including the ability to adjust the holding member's position for fine-tuning the optical axis.
3Device complexity
If conventional adhesive fixation is used for the collimator lens, then assembly is simple, but optical signal loss increases due to inaccurate optical axis alignment
Solution Approach 1:
The patent removes the adhesive agent that causes optical signal loss through misalignment. By replacing chemical bonding with mechanical retention via the holding member, the system achieves both simple assembly and accurate optical axis alignment, eliminating the trade-off between assembly simplicity and signal loss.
Data Source
AI summary
A motor drive apparatus includes: a transmission unit carrying-out transmission of an optical signal between a rotation unit for rotating a transmitting and receiving unit and a fixation unit for transmitting reflected light to a control apparatus through a signal line, wherein the transmission unit includes: a tubular shaped lens holding member where a collimator lens is held, and a holding member fixing member having first fixation surface by which the end surface of the lens holding member is fixed and second fixation surface fixed by a surface which is formed to be approximately perpendicular to the direction toward which the optical signal is emanated or the optical signal is light-received; the first fixation surface is formed in a spherical shape; and the second fixation surface is formed to be approximately perpendicular to the direction toward which the optical signal is emanated or the optical signal is light-received.