Computer controlled polisher demonstration

Area of Science:

• Optics and Manufacturing
• Materials Science

Background:

• Precision optics manufacturing requires advanced techniques for achieving desired surface figures.
• Traditional polishing methods can be time-consuming and may lack predictive capabilities.

Purpose of the Study:

• To demonstrate the efficiency of a computer-controlled polisher (CCP) process.
• To evaluate a predictive algorithm for surface figure correction in mirror polishing.

Main Methods:

• Developed a computer algorithm to predict surface figure progress during polishing.
• Utilized the CCP to polish a 1.8-m diameter lightweight glass mirror over four cycles.
• Compared actual figure improvement against algorithm predictions.

Main Results:

• The CCP process reduced the mirror's surface figure error from 0.16 to 0.04 root-mean-square (rms) waves (1 wave = 0.633 microm).
• The polishing activity was completed within 72 hours.
• Observed a lag in figure improvement compared to predictions, attributed to metrology uncertainty.

Conclusions:

• The CCP system demonstrates rapid error correction capabilities.
• The CCP is a valuable tool for efficient manufacturing of precision optical components.
• Further refinement of metrology integration can enhance predictive accuracy.