Protective overcoat for precision optical encoder grating discs that shields against environmental contaminants and mechanical damage while maintaining optical clarity.
| Parameter | Typical range | Notes & selection driver |
|---|---|---|
| Adhesion | 5B per ASTM D3359 | |
| Hardness | ≥4H pencil hardness | |
| Thickness | 5-50 μm | |
| Transmittance | >95% at working wavelengths | |
| Temperature Range | -40°C to +120°C | |
| Chemical Resistance | Resistant to IPA, acetone, oils |
Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.
This component is used in the following industrial products
A practical evidence checklist for RFQ preparation and supplier evaluation.
CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.
Manufacturer profiles associated with Protective Overcoat.
Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.
Properly applied protective overcoats are designed to have minimal impact on optical performance, with transmittance typically exceeding 95% at working wavelengths. The coating thickness and refractive index are carefully controlled to avoid distortion of the grating pattern.
Damaged overcoats typically require complete removal and reapplication by specialized equipment. Field repairs are generally not recommended as improper application can affect optical performance and encoder accuracy.
Protective overcoats are essential in environments with dust, moisture, oil mist, or chemical exposure. They're also recommended for applications involving frequent handling or potential mechanical contact.
Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.