Optical fixture manufacturing focuses on producing ultra-high precision components required for applications such as semiconductors, camera lenses, and laser modules.
Optical Fixture Machining refers to the manufacturing of precision fixtures and jigs used for positioning, holding, assembling, and aligning optical components through high-precision CNC machining, precision grinding, ultra-precision machining, and advanced inspection technologies.
These fixtures are widely used in:
- Optical lenses
- Camera modules
- Laser systems
- Semiconductor optical equipment
- Medical optical devices
- Precision inspection equipment
Because optical components are highly sensitive to positional accuracy, optical fixtures must achieve exceptional machining precision, including:
- Micron-level dimensional accuracy
- Excellent flatness
- High concentricity
- Precise perpendicularity
- Superior surface finish
- Low thermal expansion
- Excellent vibration resistance
Functions of Optical Fixtures
Optical fixtures are commonly used for:
- Optical lens positioning
- CCD / CMOS camera module fixing
- Lens barrel assembly
- Laser module alignment
- Optical platform positioning
- Laser welding fixtures
- AOI (Automatic Optical Inspection)
- Semiconductor lithography equipment
- Wafer optical inspection
- Precision assembly positioning
Common Materials
Aluminum Alloys
Typical Grades
- AL6061-T6
- AL7075-T6
- MIC-6 Cast Plate
Advantages
- Lightweight
- Excellent machinability
- Stable dimensions
- Suitable for anodizing
- Good heat dissipation
Applications
- Camera fixtures
- AOI fixtures
- Optical frames
Stainless Steel
Grades
- SUS303
- SUS304
- SUS316
- SUS420
Advantages
- High rigidity
- Corrosion resistance
- Long-term dimensional stability
Applications
- Precision positioning bases
- Optical fixtures
- Lens holders
Engineering Plastics
Materials
- PEEK
- POM
- PTFE
- PPS
Advantages
- Prevent lens scratching
- Electrical insulation
- Anti-static properties
- Suitable for vacuum environments
Ceramics
Materials
- Alumina (Al₂O₃)
- Zirconia (ZrO₂)
- Silicon Nitride (Si₃N₄)
Advantages
- Extremely high hardness
- Low thermal expansion
- Excellent dimensional stability
Optical Fixture Manufacturing Process
1. CAD Design
Design according to optical components:
- Lens
- Prism
- Filter
- Mirror
- Sensor
Prepare:
- 3D Models
- 2D Drawings
- GD&T Specifications
2. CAM Programming
Software
- Mastercam
- hyperMILL
- Fusion 360
- NX CAM
Planning
- Tool paths
- 5-axis machining
- Collision avoidance
3. CNC Rough Machining
Processes
- External profiles
- Locating holes
- Mounting holes
- Slot machining
Equipment
- 3-axis CNC
- 4-axis CNC
- 5-axis CNC
4. Semi-Finishing
Improve
- Dimensions
- Flatness
- Perpendicularity
Leave grinding allowance.
5. Precision Grinding
Machining
- Datum surfaces
- Flat surfaces
- Mating surfaces
Control
- Flatness
- Parallelism
- Surface roughness
6. Precision Drilling & Tapping
Processes
- Micro holes
- Precision locating holes
- Dowel pin holes
Tolerance
- ±0.003 mm
- ±0.005 mm
7. Surface Treatment
| Surface Finish | Purpose |
|---|---|
| Black Anodizing | Reduce light reflection |
| Hard Anodizing | Improve wear resistance |
| Electroless Nickel Plating | Corrosion and wear resistance |
| Black Oxide | Anti-reflection and corrosion protection |
| Electropolishing | Improve cleanliness |
| Sand Blasting | Uniform surface texture |
8. Precision Inspection
Inspection Equipment
- Coordinate Measuring Machine (CMM)
- Height Gauge
- Optical Comparator
- Vision Measuring System
- Laser Measurement System
Inspection Items
- Dimensions
- Concentricity
- Flatness
- Perpendicularity
- Roundness
- Hole position
Typical Machining Accuracy
| Item | Accuracy |
|---|---|
| Dimensional Tolerance | ±0.005 mm |
| Micro Machining | ±0.002 mm |
| Flatness | 0.003 mm |
| Parallelism | 0.003 mm |
| Perpendicularity | 0.005 mm |
| Concentricity | 0.003 mm |
| Surface Roughness | Ra 0.2–0.8 μm |
Typical Optical Fixtures
- Camera Module Fixture
- Lens Holder
- Lens Barrel Fixture
- Optical Alignment Fixture
- Laser Alignment Jig
- Prism Holder
- Mirror Holder
- Beam Splitter Fixture
- Wafer Optical Fixture
- AOI Inspection Fixture
- CCD Positioning Fixture
- Microscope Fixture
- Fiber Optic Alignment Fixture
- Optical Platform Fixture
- Vacuum Optical Fixture
Industries Served
- Semiconductor Equipment
- Optical Lens Manufacturing
- Smartphone Camera Modules
- Medical Optical Devices
- Fiber Optics
- Laser Equipment
- AR / VR Optical Systems
- Drone Vision Systems
- Precision Measuring Instruments
- Automatic Optical Inspection (AOI)
Key Advantages
- Micron-level machining accuracy
- Stable positioning for optical components
- High-quality CNC machining, grinding, and inspection
- Wide selection of aluminum, stainless steel, engineering plastics, and ceramics
- Anti-reflective surface treatments improve optical performance
- Ideal for semiconductor, medical, laser, and precision optical industries
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