Double-Sided Polishing for Optical Lenses
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Solution Overview
Problem
Existing methods for ultra-precision machining of optical lenses are inefficient due to cumbersome polishing processes that require frequent turning of single optical components, leading to labor-intensive and low-efficiency machining.
Innovation Solution
A double-sided polishing method where abrasive tools are arranged on both sides of the lens, with controlled motion trajectories and loading pressures, allowing simultaneous polishing of both lens surfaces to enhance machining efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If single optical component polishing is performed using traditional methods, then the polishing process requires frequent turning of the component, but this leads to labor-intensive operations and low machining efficiency
Solution Approach 1:
The invention divides the polishing process into two independent simultaneous operations by placing separate abrasive tools on both sides of the lens. Each abrasive tool independently polishes one surface of the lens at the same time, eliminating the need to turn the lens over and perform sequential polishing operations.
Solution Approach 2:
The invention combines two polishing operations into a single integrated process. Both surfaces of the lens are polished simultaneously in one setup, merging what were previously separate sequential operations into a concurrent unified process, thereby doubling the effective productivity.
2Productivity
If abrasive tools are arranged on both sides of the lens for simultaneous polishing, then machining efficiency is improved, but the device structure becomes more complex
Solution Approach 1:
The invention uses identical abrasive tools on both sides of the lens, making the system universal and adaptable to different lens types (biconvex, biconcave, concave-convex). The same basic apparatus configuration handles multiple lens geometries without requiring specialized equipment for each case.
Solution Approach 2:
The invention tailors the motion trajectory and loading pressure of each abrasive tool to match the specific surface being polished. The control system adjusts parameters locally for each side of the lens based on its curvature and polishing requirements, optimizing the polishing quality for each surface independently.
3Manufacturing precision
If the motion trajectory of abrasive tools is controlled to match surface shapes, then polishing uniformity is improved, but the control system becomes more complex
Solution Approach 1:
The invention employs dynamic control of the abrasive tool motion trajectories, allowing the tools to follow curved paths that match the lens surface geometries. The loading pressures are also dynamically adjusted during the polishing process to maintain uniform material removal rates across different surface regions.
Solution Approach 2:
The control system monitors the polishing process and adjusts the motion trajectories and loading pressures of the abrasive tools in real-time based on feedback from sensors. This closed-loop control ensures that the polishing uniformity requirements are met while adapting to variations in lens geometry and material properties.
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 method significantly improves the efficiency and uniformity of material removal for optical lenses, reducing the need for frequent turning and labor-intensive processes, while maintaining high precision.
Implementation Method 1
making the abrasive tools close to the upper and lower surfaces of the lens to swing back and forth in the polishing process, producing relative motion and removing the surface materials
Implementation Method 2
arranging abrasive tools on upper and lower positions of the lens... removing the surface materials
Data Source
AI summary
A double-sided polishing method for an optical lens belongs to the technical field of ultra-precision machining. In the double-sided polishing method, upper and lower surfaces of the lens are polished simultaneously by arranging abrasive tools on upper and lower positions of the lens, making the abrasive tools close to the upper and lower surfaces of the lens to swing back and forth in the polishing process, producing relative motion and removing the surface materials. In the present invention, in order to eliminate a problem of removal ununiformity, a method for swing machining of abrasive tools and methods for turning over and polishing of workpieces are adopted in a polishing process, which can realize the high efficiency double-sided high-precision machining for a nonplanar lens, and the method can be applied to the double-sided polishing for different types of lenses.