About
About Zhongding Optical Technology
Zhongding Optical Technology Co., Ltd. was founded in 2009 and is headquartered in Qingyuan, Guangdong Province, China. Starting as a specialist manufacturer of precision sapphire watch components, we have grown over 15 years into a vertically integrated sapphire manufacturer — one of the few in China capable of delivering the complete production chain in-house, from raw crystal processing through to downstream surface finishing including silk screening, electroplating, and PVD/CVD coating.
We hold ISO 9001:2015 certification and manufacture in compliance with EU REACH and RoHS directives. Annual production capacity exceeds 5 million sapphire components, serving OEM customers in over 50 countries.
Core Business: Precision Sapphire Watch Components
Zhongding Optical is a qualified supplier to multiple premium and luxury watch brands. We manufacture a full range of custom sapphire watch components to customer drawings and specifications:
- Watch crystals (sapphire glass faces) — round and freeform geometries, with optional AR anti-reflection or anti-fingerprint coating
- Sapphire bezels — high-precision forming, dimensional tolerance to ±0.01 mm
- Sapphire dials — compatible with silk screen printing and electroplating post-processes
- Sapphire case components — complex 3D geometries via CNC precision machining
With an annual output exceeding 5 million sapphire pieces, our consistent quality and on-time delivery have earned us repeated “Preferred Supplier” recognition from OEM customers across the watch industry.
Expanded Application Segments
As sapphire adoption accelerates across high-demand industries, Zhongding Optical has invested in advanced equipment and process capabilities to serve the following application segments:
| Application | Typical Components |
|---|---|
| Medical & Aesthetic Devices | Laser transmission windows, treatment-head contact plates, fiber-optic end caps |
| Industrial Instrumentation | High-hardness wear-resistant optical windows, sensor cover lenses |
| Infrared Optics | IR transmission windows, thermal imaging protective lenses |
| Consumer Electronics | Camera lens protectors, smartwatch cover glass |
| Smart Wearables | Sapphire smart ring shells, HUD (Head-Up Display) optical windows |
| Fine Jewelry & Luxury Goods | Custom-cut sapphire gemstone components, decorative optical elements |
Vertical Manufacturing Capabilities
Through sustained capital investment, Zhongding Optical has established a closed-loop, single-source production chain. Customers benefit from a streamlined supply chain with a single point of accountability — from drawing review to finished, inspection-passed components — eliminating the risk and complexity of managing multiple tier suppliers.
Full Production Sequence
- Incoming raw sapphire crystal inspection (IQC)
- Crystal orientation & directional slicing (X-ray diffractometer)
- Multi-wire saw slicing / block cutting
- Rough grinding → Fine grinding → Double-side precision polishing
- Laser cutting / CNC precision profiling
- Silk screen printing (fine patterns / scale markings / logos)
- Electroplating (decorative & functional)
- Vacuum coating — PVD / CVD / AR anti-reflection / HR high-reflection / ITO conductive films
- Final inspection & shipment with Inspection Report and Certificate of Conformance (CoC)
Quality & Compliance
Our three-tier quality system — Incoming Quality Control (IQC), In-Process Quality Control (IPQC), and Outgoing Quality Control (OQC) — is supported by a dedicated metrology laboratory. Standard achievable specifications include:
- Dimensional tolerance: ±0.01 mm
- Surface flatness: λ/10
- Surface roughness: Ra ≤ 0.5 nm (optical polish grade)
Zhongding Optical holds ISO 9001:2015 certification. All products comply with EU REACH and RoHS directives. Full quality documentation is available, and factory audits — including third-party audits — are welcomed.
Manufacturing Facility at a Glance
| Parameter | Details |
|---|---|
| Factory Location | Qingyuan City, Guangdong Province, China |
| Production Floor Area | 12,000 m² |
| Total Workforce | 200+ employees |
| Annual Output Capacity | 5,000,000+ sapphire components |
| Quality Certification | ISO 9001:2015 |
| Regulatory Compliance | EU REACH · RoHS |
| Sample Lead Time | 7–15 business days |
| Production Lead Time | 15–30 business days (specification-dependent) |
| Minimum Order Quantity | No hard MOQ — prototype and small-batch orders welcomed |
| Shipping Terms | EXW / FOB / DDP |
Request a Quote
Whether you are at the prototyping stage seeking sample validation, or in series production requiring a reliable volume supplier, Zhongding Optical provides end-to-end support — from drawing review and DFM analysis through to batch delivery.
Submit your drawings (DXF / DWG / STEP / PDF accepted) or physical samples to receive a detailed quotation and DFM feedback within 24 hours.