Key Features
- Designed for MIR wavelength bands: Coating designs can be customized for 3–5 μm, 8–12 μm or other project-specific infrared ranges.
- Lower infrared reflection: Helps reduce reflection loss from infrared windows, substrates and protective optical covers.
- Improved MIR transmission: Supports better signal performance in thermal imaging, gas sensing, spectroscopy and infrared detection systems.
- Application-based coating design: The coating structure can be matched to wavelength range, bandwidth, incident angle and substrate refractive index.
- Single-side or double-side coating: Available according to the optical path, assembly structure and total transmission requirement.
- Custom substrate processing: Can be combined with cutting, CNC machining, drilling, edge finishing, polishing, cleaning and final inspection.
Typical Technical Options
MIR AR coating specifications should be confirmed according to the actual optical system. The table below lists common items that are usually reviewed before production.
| Item | Custom Options | Project Notes |
|---|---|---|
| Working Wavelength | 3–5 μm, 8–12 μm or custom MIR bands | The coating should be designed around the real operating wavelength, not only the material name. |
| Bandwidth | Single wavelength, narrow band or selected broadband range | Wider bandwidth usually requires more careful coating design and performance balance. |
| Incident Angle | Normal incidence or specified angle | Angle of incidence can affect reflection, polarization and coating performance. |
| Coating Side | Single-side or double-side coating | Double-side coating is often considered when both surfaces affect total transmission. |
| Substrate Material | Infrared optical glass or selected IR-compatible substrates | Material transmission must be checked according to the MIR wavelength range. |
| Clear Aperture | Custom according to drawing | The effective optical area should be clearly defined before coating. |
| Part Shape | Round, square, rectangular, custom-cut or CNC machined parts | Drawings are recommended for holes, slots, steps, chamfers or special outlines. |
| Inspection Items | Dimensions, coating area, appearance, transmission, reflection and surface quality | Testing items should be agreed before production for precision optical projects. |
Substrate Material Considerations
Substrate selection is one of the most important steps in a MIR coating project. Many common glass materials do not transmit well across the full mid-infrared range, so the material must be checked against the actual working wavelength before processing and coating.
If the customer has already specified an infrared material, we can review the drawing, surface requirement and coating target before production. If the material has not been finalized, our team can help evaluate practical options based on wavelength range, mechanical strength, thermal condition, processing feasibility and cost.
| Substrate Type | Common Use | Important Consideration |
|---|---|---|
| Infrared Optical Glass | IR windows, infrared lenses, detection modules and optical assemblies | Should be selected according to MIR transmission range, refractive index and coating target. |
| Fused Silica / Quartz Glass | Selected infrared-related windows and stable precision glass parts | Suitable for some near-IR or short-wave IR applications, but not all MIR bands. Wavelength must be confirmed. |
| Borosilicate Glass | Protective glass covers and selected industrial optical components | Often used for mechanical protection or selected optical paths. MIR transmission suitability must be checked. |
| Sapphire, Silicon, Germanium, ZnSe or CaF₂ | Special infrared windows, lenses and high-performance IR components | If these materials are required, please provide material grade, size, surface requirement and coating target for review. |
| Custom Optical Substrates | Spectroscopy, gas sensing, thermal imaging and laser-related components | The substrate should be confirmed together with the working wavelength and operating environment. |
Applications of MIR AR Coated Components
MIR AR coated components are used when mid-infrared light needs to pass through an optical surface with reduced reflection. These parts are often used as optical windows, protective covers, substrates or precision components inside infrared systems.
- Thermal imaging systems: Infrared windows and protective optical components for thermal cameras and imaging modules.
- Gas analysis equipment: MIR optical windows and substrates used in infrared absorption and gas detection systems.
- Infrared sensors: Coated windows, covers and substrates for IR detection modules and sensing assemblies.
- Spectroscopy instruments: Optical components for FTIR-related systems, mid-infrared analysis and laboratory measurement equipment.
- MIR laser systems: Precision windows and substrates for selected mid-infrared laser applications.
- Industrial optical assemblies: Custom coated components for OEM infrared instruments and optical modules.
Processing Before MIR Coating
MIR coated parts are often customized parts rather than standard plates. They may require specific dimensions, holes, slots, chamfers, polished edges, controlled flatness, clear aperture control or special surface preparation before coating.
Processing quality before coating has a direct effect on the finished component. Edge chips, surface contamination, poor polishing or unclear coating areas can create quality problems after coating. For this reason, the drawing, processing method and inspection items should be confirmed before production.
| Processing Step | Purpose |
|---|---|
| Material Review | Confirm whether the substrate is suitable for the target MIR wavelength and final application. |
| Cutting | Prepare custom-size blanks, windows or substrates. |
| CNC Machining | Process holes, slots, contours, steps, chamfers or custom structures. |
| Grinding and Polishing | Improve edge quality, surface condition and coating preparation. |
| Cleaning | Remove particles, oil, residue and surface contamination before coating. |
| MIR AR Coating | Apply coating according to target wavelength, coating side and optical requirement. |
| Final Inspection | Check dimensions, surface quality, coating area, coating appearance and optical performance. |
| Protective Packaging | Protect coated surfaces during handling, storage and shipment. |
Quality Control for MIR AR Coated Components
For MIR AR coated components, inspection should cover both the substrate and the coating. The substrate must meet dimensional and surface requirements before coating, while the finished component should be checked for coating area, appearance and optical performance according to the agreed specification.
Depending on the project, inspection items may include:
- Substrate material and drawing confirmation before production
- Dimensions, thickness, hole position, contour and edge quality
- Clear aperture and coating area confirmation
- Surface appearance before and after coating
- Coating side and visual coating uniformity
- Transmission and reflection performance in the required MIR band
- Flatness, surface quality or optical surface requirement when specified
- Cleaning, separation and protective packaging before shipment
For strict infrared projects, please provide the target wavelength range, transmission or reflection target, incident angle, substrate material, testing method and operating environment before production. These details help confirm whether the requested specification is practical before machining and coating begin.
Why Work with Anole Precision?
- Integrated processing and coating support: We can process, clean, coat, inspect and package custom infrared optical components according to one project requirement.
- Material review before production: We help review whether the selected substrate is suitable for the required MIR wavelength range and processing method.
- Custom part capability: We support non-standard sizes, holes, slots, chamfers, polished edges, clear aperture requirements and custom coated areas.
- Prototype and batch support: We support sample verification, one-piece customization and small-to-medium batch production.
- Inspection based on project requirements: Dimensions, surface quality, coating appearance and optical performance can be checked according to agreed specifications.
Custom MIR AR Coated Components Manufacturer
Anole Precision provides custom MIR AR coating for infrared optical windows, precision substrates and machined optical components used in thermal imaging, gas analysis, infrared sensing, spectroscopy, laser systems and industrial optical assemblies.
Send us your drawing, substrate material, target wavelength range, coating side and application details. Our team will review the material, processing route, coating requirement and inspection method before providing a practical solution for your MIR AR coated component project.
