Projection Lens Barrel Alignment Mechanism for Aberration Control
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Solution Overview
Problem
Existing projection lenses face challenges in preventing aberration, particularly when relying solely on the alignment of the first lens group, which can lead to insufficient suppression of aberration and reduced resolution performance.
Innovation Solution
The projection lens design incorporates a lens barrel with a first temporarily holding mechanism for the first lens group and a second temporarily holding mechanism for the final lens group, allowing for precise alignment in multiple directions, including perpendicular and axial displacements, and uses adhesives to secure the lens groups in place after alignment, preventing post-alignment displacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If only the first lens group is aligned, then the alignment process is simple, but aberration cannot be sufficiently suppressed and resolution performance deteriorates
Solution Approach 1:
The alignment mechanism is segmented into two independent parts: a first alignment mechanism for the first lens group and a second alignment mechanism for the final lens group. This segmentation allows each mechanism to be optimized for its specific function, enabling precise alignment of both lens groups without requiring an overly complex unified system.
Solution Approach 2:
The patent applies preliminary action by providing temporary holding mechanisms that allow lens groups to be displaced during the alignment process. The first temporarily holding mechanism enables preliminary alignment of the first lens group, and the second temporarily holding mechanism enables preliminary alignment of the final lens group, both before final fixation with adhesives.
2Manufacturing precision
If the lens groups are made movable for alignment, then alignment precision is improved, but stability after alignment deteriorates due to potential displacement
Solution Approach 1:
The temporary holding mechanisms are designed to maintain lens groups in their aligned positions through the alignment process. The first temporarily holding mechanism holds the first lens group in its aligned position, and the second temporarily holding mechanism holds the final lens group in its aligned position, preventing any displacement that would occur if the groups were completely free-moving.
Solution Approach 2:
Adhesives are introduced as intermediary substances to bond the lens groups to their respective holding barrels after alignment. The first adhesive bonds the first lens group to the first lens group holding barrel, and the second adhesive bonds the final lens group to the final lens group holding barrel, providing stable fixation while allowing precise alignment to be achieved first.
3Manufacturing precision
If multiple lens groups are aligned, then aberration suppression and resolution performance are improved, but the manufacturing process becomes more complex
Solution Approach 1:
The manufacturing process is segmented into independent alignment operations for different lens groups. The first alignment mechanism and second alignment mechanism operate independently, allowing alignment of the first lens group and final lens group to be performed as separate, manageable tasks rather than a single complex operation.
Solution Approach 2:
Each lens group has its own dedicated alignment mechanism and temporary holding mechanism, making the alignment process self-contained for each group. The first alignment mechanism serves only the first lens group, and the second alignment mechanism serves only the final lens group, simplifying the overall manufacturing process by avoiding interdependencies.
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 effectively prevents aberration, enhances resolution performance by allowing for precise alignment of both the first and final lens groups, and improves image quality by reducing field inclination.
Implementation Method 1
a first adhesive adapted to bond the first lens group holding barrel and the outer barrel to each other to make the first lens group unable to be displaced
Implementation Method 2
a second adhesive adapted to bond the second lens group holding barrel and the outer barrel to each other to make the final lens group unable to be displaced
Data Source
AI summary
A projection lens includes a plurality of lens groups each formed of at least one lens, and a lens barrel adapted to support each of the lens groups from an outer circumferential side. The lens barrel includes a first temporarily holding mechanism allowing the first lens group located at an end on a enlargement side to be displaced in a direction perpendicular to the optical axis, a first adhesive applied to the first temporarily holding mechanism to fix the first lens group so as to be unable to be displaced, a second temporarily holding mechanism allowing the seventh lens group located at an end on a reduction side to be displaced in a direction perpendicular to the optical axis, and a second adhesive applied to the second temporarily holding mechanism to fix the seventh lens group so as to be unable to be displaced.