Adjustable Jointed Lens Unit for Projection Optical Systems
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Solution Overview
Problem
Existing projection optical systems lack a mechanism to adjust the thickness of jointed lenses along the optical axis direction, leading to issues with TV distortion and aberration in the final image.
Innovation Solution
A lens unit with a jointed lens configuration, featuring a first and second optical member and a light transmissive jointing member, along with an adjustment mechanism that allows for adjustable distance between the optical members, enabling precise adjustment of the lens thickness to maintain optimal image projection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a jointed lens is manufactured by jointing multiple lenses with adhesive or resin, then the lens structure is formed, but the thickness along the optical axis direction cannot be adjusted after manufacturing
Solution Approach 1:
The patent introduces an adjustment mechanism that enables dynamic adjustment of the distance between the first and second optical members along the optical axis direction. This transforms the static jointed lens structure into a dynamic one where the thickness can be adjusted after manufacturing, resolving the contradiction between manufacturing precision and structural complexity.
Solution Approach 2:
The patent divides the jointed lens into separable components (first optical member, second optical member, and adjustment mechanism) that can be independently positioned and adjusted. This segmentation allows for post-manufacturing thickness adjustment while maintaining the overall lens functionality.
2Reliability
If the thickness of the jointed lens is not adjustable, then the manufacturing process is simpler, but TV distortion and aberration occur in the final image
Solution Approach 1:
The patent enables changing the thickness parameter of the jointed lens along the optical axis direction after manufacturing. This parameter adjustment capability allows for optimizing image quality and eliminating TV distortion and aberration without complicating the manufacturing process excessively.
3Stability of the object's composition
If multiple lenses are jointed with adhesive, then the lens structure is stable, but the optical axes of the lenses may not coincide
Solution Approach 1:
The adjustment mechanism acts as an intermediary between the first and second optical members, providing a controlled interface that enables precise positioning and alignment of the optical axes while maintaining structural stability through the jointing member.
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 effectively suppresses TV distortion and aberration by allowing for precise adjustment of the lens unit's thickness, ensuring accurate image projection and maintaining image quality.
Implementation Method 1
The jointing member adheres to the first optical member and the second optical member in a deformable manner
Data Source
AI summary
The lens unit includes a jointed lens having a first optical member, a second optical member disposed on an optical axis of the first optical member, and a jointing member having a light transmissive property and disposed between the first optical member and the second optical member, and an adjustment mechanism holding the first optical member and the second optical member and adjusting a distance between the first optical member and the second optical member along an optical axis direction. The jointing member adheres to the first optical member and the second optical member in a deformable manner. The adjustment mechanism adjusts the distance to change the thickness of the jointing member along the optical axis direction.