Scanning Optical Device One-Sided Lens Mounting
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Solution Overview
Problem
The existing scanning optical devices require complex and burdensome processes for attaching multiple coupling lenses, which complicates the manufacturing process due to the need to attach lenses on opposite sides of a holder, leading to alignment and stability issues.
Innovation Solution
A scanning optical device configuration where multiple coupling lenses are attached on the same side using holders with photo-curable resin fixation, allowing for parallel alignment with the rotation axis of a polygon mirror, and featuring legs to prevent collisions and ensure stable attachment, with holders made of plastic to minimize thermal expansion effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If coupling lenses are attached on opposite sides of a holder wall, then the holder structure is stable, but the manufacturing process becomes complicated and burdensome
Solution Approach 1:
The patent merges multiple attachment operations into a single-sided process. Multiple coupling lenses are attached to seating surfaces on one side of the holder wall, eliminating the need to attach lenses to both sides of the wall. This combining of attachment operations simplifies the manufacturing process while maintaining the holder's structural stability through its wall design.
2Productivity
If multiple coupling lenses are attached on the same side, then the attachment process is simplified, but alignment precision must be maintained
Solution Approach 1:
The patent applies local quality by providing dedicated seating surfaces with specific geometric features on the holder. Each seating surface has a predetermined shape that locally ensures precise positioning and alignment of coupling lenses. This localized precision feature on each seating surface maintains alignment accuracy while enabling simplified one-sided attachment of multiple lenses.
3Reliability
If holders are made of plastic, then thermal expansion effects are minimized, but the holding strength must be sufficient
Solution Approach 1:
The patent employs composite material construction for the holder, combining plastic material with metallic reinforcing ribs. The plastic base material provides low thermal expansion properties for thermal stability, while the integrated metallic ribs provide enhanced mechanical strength and rigidity. This composite structure simultaneously achieves both thermal reliability and mechanical strength requirements.
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 configuration simplifies the attachment process, enhances precision, and reduces thermal expansion deviations, facilitating easier alignment and stable operation of the scanning optical device by allowing multiple lenses to be attached on one side while maintaining precision and stability.
Implementation Method 1
The first holder has a seating surface on which the first coupling lens is fixed by a photo-curable resin. The second holder is fixed to the first holder by a photo-curable resin.
Data Source
AI summary
A scanning optical device proposed herein includes first and second semiconductor lasers, first and second coupling lenses, a polygon mirror, and first and second holders. The first and second coupling lenses convert light emitted by the first and second semiconductor lasers into light beams, respectively. The polygon mirror deflects the light beams received from the first and second coupling lenses. The first holder has a seating surface on which the first coupling lens is fixed by a photo-curable resin. The second holder is configured to hold the second coupling lens in such a position that the first and second coupling lenses are arranged in a line parallel to a rotation axis of the polygon mirror. The second holder is fixed to the first holder by a photo-curable resin.