Convex Lens Positioning Using Tapered Attitude Control
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Solution Overview
Problem
Accurate positioning of convex optical surfaces in lens patterning is challenging due to their curved nature, making precise patterning difficult with existing methods.
Innovation Solution
A lens positioning mechanism that includes a member holding unit to bias and hold the lens, an attitude control unit with tapered portions to regulate edge positions, and a sensor unit for precise measurement, allowing for accurate positioning of the lens in a predetermined attitude.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional positioning methods are used on convex optical surfaces, then the positioning process can be performed, but the positioning accuracy is insufficient
Solution Approach 1:
A positioning reference member with a tapered portion is introduced as an intermediary between the convex optical surface and the positioning system. The tapered portion engages with the convex surface to provide stable geometric constraints, enabling accurate positioning without direct complex measurement or adjustment on the curved surface itself
Solution Approach 2:
The positioning reference member is designed with predetermined tapered geometry that pre-establishes the correct positioning attitude before the actual patterning process. The lens is positioned in advance using the tapered reference, ensuring the optical surface is properly oriented before any processing occurs
2Ease of manufacture
If the optical surface is a convex curved surface, then the lens can be manufactured, but accurate positioning becomes difficult
Solution Approach 1:
The positioning reference member acts as a mediator that translates the convex curved surface into a positionable object. The tapered portion of the reference member fits against the convex surface, converting the manufacturing feasibility of the curved lens into precise positioning capability through geometric constraint
3Ease of operation
If the lens member is biased toward the first surface, then the convex optical surface becomes accessible for processing, but stable positioning is challenging
Solution Approach 1:
The positioning reference member provides localized stability through its tapered portion that engages with a specific region of the convex optical surface. This local geometric constraint ensures the lens remains stable in the biased position during processing, while the rest of the lens maintains its convex curvature for optical performance
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
Enables easy and highly precise positioning of lenses with convex optical surfaces, improving the accuracy of patterning processes by using the convex surface as a reference for positioning and processing.
Implementation Method 1
a pad that holds the second surface of the lens member by vacuum suction
Data Source
AI summary
A lens positioning mechanism includes: a member holding unit that has a function of holding a second surface of a lens member having a first surface, which is a convex optical surface, and the second surface, which is an optical surface facing the first surface, and biasing the held lens member toward a side of the first surface; and an attitude control unit that regulates edge positions of a plurality of portions on the first surface of the lens member biased by the member holding unit to position the lens member in a predetermined attitude.