The right grit progression for fiber optic polishing is crucial to achieving optimal performance and clarity in fiber optic connectors. Here’s a general guide to the grit progression typically used in fiber optic polishing:
Grit Progression for Fiber Optic Polishing:
- Initial Grinding (Coarse Grit):Grit Size: 30µm or 15µm
Purpose: Removes large surface defects and shapes the fiber end-face.
Film Type: Silicon Carbide or Aluminum Oxide
Details: This step is aimed at quickly removing material to get close to the desired shape. - Intermediate Grinding (Medium Grit):Grit Size: 9µm or 6µm
Purpose: Smoothens the surface after the initial grinding and reduces scratches left by the coarse grit.
Film Type: Silicon Carbide or Aluminum Oxide
Details: Helps refine the surface and prepare it for finer polishing. - Fine Polishing (Fine Grit):Grit Size: 3µm or 1µm
Purpose: Further smoothens the surface and removes any remaining scratches.
Film Type: Diamond or Aluminum Oxide
Details: Achieves a finer finish and prepares the surface for the final polishing stage. - Final Polishing (Super Fine Grit):Grit Size: 0.3µm or 0.1µm
Purpose: Provides a mirror-like finish and ensures the highest quality of optical performance.
Film Type: Diamond or Cerium Oxide
Details: Ensures the fiber end-face is free from scratches and has the best possible surface quality for optimal light transmission.
Key Points to Consider:
- Type of Abrasive: Diamond films are preferred for fine and final polishing due to their efficiency in achieving ultra-smooth surfaces. Silicon Carbide and Aluminum Oxide are generally used in earlier stages for material removal.
- Film Backing: Polyester backings are commonly used for durability and uniform performance.
- Consistency: Ensure each grit stage is thoroughly cleaned before moving to the next stage to avoid contamination and cross-grit scratches.
Example Polishing Sequence:
- Coarse Grit Film (15µm)
- Intermediate Grit Film (9µm)
- Fine Grit Film (3µm)
- Final Polishing Film (0.3µm or 0.1µm)
This progression ensures that each stage refines the surface progressively, leading to a high-quality finish suitable for high-performance fiber optic connections. Adjustments to this sequence might be necessary based on specific connector types, fiber diameters, or polishing equipment used. For more information on high-quality lapping films, visit our website at polishingfilm.com or contact us at sales@xytbrands.com | +8615702088819.