Optics & Photonics CNC Machining in Singapore

Optomechanical Precision & Thermal Stability

Optical assemblies require strict geometric concentricity, fine thread pitch control, low-scatter surface finishes, and controlled thermal expansion. We machine precision metals and optical plastics with stress-relieved thermal cycling, non-reflective matte finishing, and Zeiss CMM verification.

• Tight geometric control - Concentricity, runout, and positioning tolerances down to ±0.01mm for optical axis alignment
• Fine surface quality - Surface roughness down to Ra 0.1µm on critical optical datum faces and reference flats
• Stray-light suppression - Non-reflective bead blasting and matte black anodizing to eliminate unwanted internal reflections
• Thermal expansion control - Invar 36 and titanium machining with multi-stage stress relief for extreme temperature stability

For an engineering analysis on managing thermal expansion budgets, stray-light suppression, and optical surface finishes, read our guide on Machining Optical Components: Surface Finish, Materials, and Tolerances.

Optics & Photonics Applications

• Lens barrels & retaining rings - Precision threaded barrels with high concentricity for multi-element lens assemblies
• Kinematic & mirror mounts - High-stability flexure mounts, mirror cells, and gimbal brackets
• Laser cavities & spectrometer housings - Hermetically sealed optical enclosures and resonator chassis
• Beam steering & scan mechanisms - Low-inertia galvanometer mounts and motorized stage brackets
• Optical calibration fixtures - Calibrated alignment tooling, target holders, and interferometer test benches

Materials for Optics & Photonics

We machine metals and optical polymers selected for thermal stability, stiffness, and light management:

• Aluminium (6061-T6, 7075-T6) - Standard alloy for optical housings and barrels, finished with matte black Type II or Type III anodizing
• Invar 36 - Ultra-low thermal expansion alloy for laser resonators, space optics, and metrology benches requiring thermal stability across varying temperatures
• Stainless steel (303, 316L, 17-4 PH) - Rigid, corrosion-resistant kinematic adjusters, lead screws, and mounting hardware
• Titanium (Grade 5) - High stiffness-to-weight ratio with moderate thermal expansion for airborne and space-borne optical assemblies
• Acrylic (PMMA) and Polycarbonate - Precision-machined and vapor-polished transparent light guides, prisms, and protective windows

Thermal Stability & Stress-Relief Protocols

For high-precision optical structures and Invar components, residual material stresses can cause gradual dimensional drift over time. We incorporate intermediate stress-relieving heat cycles between roughing and finishing passes to ensure parts retain their calibrated geometries during assembly and field operation.

Why Optics & Photonics Engineers Partner with Shine

• Concentricity & Alignment Accuracy - CNC turned lens barrels and retaining rings held to ≤ 0.010 mm runout for precise multi-element optical axis alignment.
• Thermal Stability & Stress Relief - Invar 36, titanium, and aluminium optical structures processed with intermediate stress-relieving thermal cycles to eliminate post-machining drift.
• Single-Setup 5-Axis Kinematic Mounts - Simultaneous 5-axis machining for compound-angle mirror cells, gimbal brackets, and flexures without stacking fixture errors.
• Integrated Stray-Light Finishes - Non-reflective bead blasting and optical matte black Type II/III anodizing managed in-house to minimize internal reflection.
• Cleanroom Sub-Assembly - Particle-free mechanical assembly and optomechanical staging inside ISO Class 7 cleanrooms.

Frequently Asked Questions