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Detailed Polishing Process for Optical Domes

I. Pre-treatment
Pre-treatment refers to the preliminary steps performed before dome polishing to ensure quality and stability of the polishing results. Specific steps include:

1. Cleaning: Thoroughly clean the dome to remove dirt and grease.

2. Mounting: Securely mount the dome before polishing to prevent shaking or deformation during the process.

3. Grinding: Conduct initial grinding using sandpaper or grinding machines to eliminate surface burrs and deep flaws, ensuring a smooth and uniform surface.

II. Polishing
Polishing builds upon pre-treatment. Different polishing techniques yield varying results. Common methods include:

1. Mechanical Polishing:

   • Uses high-speed rotating cloth wheels or stiff brushes.

   • Achieves high-quality polished surfaces.

2. Chemical Polishing:

   • Applies chemical agents to rapidly remove oxidation layers and contaminants.

   • Requires strict control of chemical concentration and duration to prevent over-etching.

3. Electropolishing:

   • Utilizes ion movement under electric fields (specific voltage/current).

   • Advantages: High efficiency, uniformity, and environmental friendliness.

Note: Each method has strengths and limitations; selection depends on practical requirements.

III. Post-treatment
Post-treatment protects and enhances polishing results. Key stages:

1. Cleaning:

   • Remove residual chemicals or abrasive materials after polishing.

2. Surface Treatment:

   • Apply optical coatings or anti-corrosion agents to prevent oxidation-induced discoloration or damage.

3. Packaging:

   • Securely package domes to minimize scratches or impacts during transport or use.

Critical Considerations:

• Strictly control parameters: polishing duration, temperature, and precision.

• Use appropriate tools and chemicals to avoid unnecessary damage.

Conclusion
This document details the pre-treatment, polishing, and post-treatment stages of dome polishing. Understanding this workflow and its techniques helps preserve dome quality and optical performance effectively.