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Convergent Polishing: A Simple, Rapid, Full Aperture Polishing Process of High Quality Optical Flats & Spheres

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Dwell-time algorithm for polishing large optics.

Chunjin Wang, Wei Yang, Zhenzhong Wang

|August 5, 2014

Summary

This summary is machine-generated.

A new self-adaptive iterative algorithm accurately calculates dwell time for polishing large optics. This method ensures stability, high convergence, and speed, even for extremely large mirrors, making precision polishing more efficient.

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Area of Science:

Optics Manufacturing
Precision Engineering
Computational Science

Background:

Accurate dwell time calculation is critical for precision large optics polishing.
Existing algorithms face challenges with stability, convergence, and speed for large optics.

Purpose of the Study:

To introduce a novel self-adaptive iterative algorithm for dwell time calculation.
To enhance the stability, convergence ratio, and solution speed of dwell time calculations for large optics.

Main Methods:

Developed and simulated a self-adaptive iterative algorithm for dwell time calculation.
Tested the algorithm on a 430mm x 430mm fused silica part using bonnet polishing (BP).
Evaluated performance based on initial and final surface error (PV and RMS).

Main Results:

Achieved a significant reduction in surface error from PV=1741.29nm, RMS=433.204nm to PV=11.7nm, RMS=0.5nm.
Demonstrated algorithm stability, high convergence, and fast solution speed on an ordinary computer.
Showcased solution times of seconds for even 1000mm x 1000mm parts.

Conclusions:

The self-adaptive iterative algorithm is highly suitable for polishing large optics.
The method offers stability, speed, and accuracy for bonnet polishing and other subaperture deterministic processes.
This advancement improves efficiency and precision in large optics manufacturing.