Single Point Diamond Turning (SPDT) represents one of the most precise manufacturing processes available for creating optical-quality surfaces on metal, plastic, and semiconductor materials. This ultra-precision machining technique uses a naturally occurring or synthetic diamond as the cutting tool, operating in a controlled environment to produce surfaces with nanometer-level form accuracy and sub-nanometer surface roughness. The technology enables manufacturers to produce complex optical components without requiring expensive mold tooling or multi-stage polishing operations. For engineers and procurement specialists evaluating SPDT as a manufacturing solution, understanding the process capabilities, limitations, and optimal applications is essential for making informed sourcing decisions. YISHUN Optical’s SPDT capabilities, powered by Moore Nanotech 250 UPL diamond turning machines and 20+ years of expertise, demonstrate how this technology serves demanding optical applications across aerospace, medical, and consumer electronics sectors. Key Takeaways What is Single Point Diamond Turning? Single Point Diamond Turning is a precision machining process where a single-crystal or polycrystalline diamond tool with a precisely controlled geometry removes material from a rotating workpiece. The process occurs on specialized ultra-precision CNC machines (often called diamond turning centers) that provide: The diamond tool itself is fabricated from natural or synthetic diamond, with edge radii ranging from 0.1μm to

Introduction Optical component manufacturing represents significant investment for precision applications. Reducing costs while maintaining quality requires strategic approaches that address design, sourcing, and supplier relationships. This guide provides actionable strategies used by leading OEMs to optimize optical manufacturing investment. Design Optimization Strategies Design decisions made early in product development have the greatest impact on manufacturing cost. Working with suppliers during design phase often reveals significant cost reduction opportunities. Specify Realistic Tolerances The Problem: Over-specified tolerances increase manufacturing cost without improving function. The Solution: Analyze functional requirements and specify tolerances that meet performance needs, not arbitrary precision levels. Cost Impact by Tolerance Level: Tolerance Relative Cost When Appropriate ±50μm 1x baseline Non-critical dimensions ±10μm 1.2-1.5x Standard precision ±5μm 1.5-2x Precision assemblies ±1μm 2-3x Precision optics ±0.5μm 3-5x Ultra-precision (Moore/RODERS) ±0.1μm 8-15x Specialized applications Strategy: Review each tolerance with your engineering team and supplier. Ask: “What happens if this dimension is at ±10μm instead of ±5μm?” If the answer is “nothing functional changes,” loosen the tolerance. Optimize Surface Requirements The Problem: Surface roughness specifications tighter than necessary dramatically increase processing time and cost. The Solution: Match surface requirements to functional need: Surface Requirement Cost Multiplier Appropriate Applications Ra 100-500nm 1x Functional surfaces,

Precision optical polishing is a controlled finishing process used to improve the surface quality, flatness, roughness, and optical performance of components such as lenses, windows, mirrors, prisms, wafers, and precision substrates. It removes fine surface defects left by cutting, grinding, or lapping and helps achieve the optical clarity or reflective performance required in high-precision applications. For many optical and photonics projects, polishing is not simply a cosmetic finishing step. It directly affects transmission, reflection, scattering, image quality, laser damage resistance, sealing performance, and assembly accuracy. When combined with lapping, precision polishing can help control both the geometry and the final surface finish of optical components. If your project requires custom optical surfaces, tight flatness, low surface roughness, or controlled scratch-dig quality, working with an experienced optical polishing and lapping services provider can help reduce technical risk during prototyping and production. What Is Precision Optical Polishing? Precision optical polishing is a fine material-removal process used to create smooth, accurate, and defect-controlled optical surfaces. Unlike general polishing, which may only improve appearance, optical polishing focuses on measurable performance parameters such as flatness, parallelism, surface roughness, dimensional tolerance, and surface quality. The goal of precision optical polishing is to produce a surface that