IR Grade CVD ZnSe Optics for LWIR Thermal Imaging Systems
- Model
- FG-IR Grade CVD ZnSe
Item specifics
- Material
- CVD Zinc Selenide (IR Imaging Grade)
- Refractive Index
- 2.403 @10μm
- Density
- 5.27 g/cm³
- Knoop Hardness
- 110 Kg/mm²
- Thermal Conductivity
- 0.18 W/(cm·K)
- Water Solubility
- Insoluble in water
- Operating Temperature Range
- -60℃ ~ +120℃
- Transmission Range
- 0.6 μm ~16 μm
- Coating
- LWIR Broadband AR Coating, DLC Hard Coating
- Max Single Part Diameter
- Up to 220mm
- Drawing Format Accept
- STEP, IGES, PDF, DXF
- Minimum Order
- Prototype sample available, MOQ negotiable
- Lead Time
- Prototype:7~10 working days; Mass production:14~25 working days
- Application Vertical
- Thermal Camera, EO/IR Gimbal, Surveillance, Remote Sensing
Review
Description
IR Grade CVD ZnSe Optics for LWIR Thermal Imaging Systems
Felix Optical Glass Co., Limited manufactures IR grade CVD ZnSe hemispherical domes, flat windows and plano-convex lenses, specially optimized for LWIR thermal cameras and EO/IR sensor protection. This IR imaging grade CVD zinc selenide delivers stable broadband infrared transmission, designed for low-to-medium power thermal sensing applications. View Laser Grade CVD ZnSe for high power CO₂ laser systems to confirm the correct material grade for your project.
Available Component Shapes: Dome, Flat Window & Plano-Convex Lens
- Hemispherical IR grade CVD ZnSe dome: front protective optics for thermal imaging sensor heads
- Flat circular ZnSe window: sealed protective cover for LWIR thermal camera assemblies
- Plano-convex ZnSe lens: infrared focusing element for thermal imaging optical trains
Custom outer diameter, wall thickness, curvature radius and edge machining are fully supported. Learn material selection principles in our IR ZnSe thermal imaging selection guide.
Key Material Advantages of IR Grade CVD ZnSe
- Excellent broadband infrared transmission across 0.6–16μm LWIR band
- Good mechanical strength and moisture stability for outdoor EO/IR sensor housings
- Precision polished optical surface, controlled surface figure and scratch-dig quality
- Independent raw material batch segregation, fully separated from laser grade ZnSe stock
- Suitable for thermal camera, infrared surveillance and remote sensing sensor protection
Custom AR Coating & Surface Protection Options
We supply broadband AR anti-reflection coating tuned for LWIR thermal imaging band to boost infrared transmittance and reduce ghost reflection. DLC hard coating can be added to improve abrasion, dust and humidity resistance for field-deployed thermal sensors. Full coating design parameters are detailed in our engineering design specifications blog.
Technical Specifications of IR Grade CVD ZnSe Optics
| Material | IR Grade CVD ZnSe (thermal imaging grade) |
|---|---|
| Transmission Band | 0.6–16μm, optimized for LWIR thermal imaging |
| Refractive Index | 2.403 @10μm |
| Density | 5.27 g/cm³ |
| Knoop Hardness | 110 Kg/mm² |
| Thermal Expansion Coefficient | 7.6 ×10⁻⁶ /K |
| Operating Temperature | -60℃ ~ +120℃ |
| Surface Quality | 40-20 scratch-dig (standard IR optics grade) |
| Surface Figure | λ/4 @ 632.8nm |
| Dimensional Tolerance | Diameter ±0.05mm, thickness ±0.02mm |
| Component Forms | Hemispherical dome, flat window, plano-convex lens |
IR grade CVD ZnSe features moderate hardness and low thermal expansion, suitable for outdoor EO/IR sensors with normal temperature fluctuation. It is insoluble in water; DLC coating can further enhance surface protection in high humidity environments. All raw materials are stored separately from laser-grade ZnSe to avoid cross-grade contamination.
Custom Manufacturing, Prototype & Quality Control
We accept OEM custom drawings, small prototype batches and serial production. Prototype samples can be produced after drawing confirmation for assembly fit testing and spectral validation. Every batch provides material grade certificate, dimensional inspection report, scratch-dig record and spectral transmittance test data. Material handling and polishing stations are isolated to avoid cross contamination with laser grade ZnSe material.
Request Quotation & Datasheet for IR Grade CVD ZnSe
Submit your required component shape, dimensions, working wavelength, coating scheme, quantity and environmental conditions through the inquiry form. Our optical engineering team will review your drawing, confirm feasibility and issue a formal quotation with full optical acceptance criteria. We also support FEA structural simulation for domes used on outdoor gimbal sensor platforms.
Frequently Asked Questions for IR Grade CVD ZnSe Thermal Optics
1. What is the main difference between IR grade CVD ZnSe and laser grade CVD ZnSe?
IR grade ZnSe is optimized for LWIR thermal imaging transmission and sensor protection, while laser grade ZnSe controls ultra-low absorption for high power CO₂ laser. Check laser grade product page.
2. Can IR grade CVD ZnSe dome be used on EO/IR gimbal systems?
Yes, our hemispherical IR grade ZnSe domes are widely adopted for EO/IR gimbal sensor protection, with optional DLC coating for outdoor abrasion resistance.
3. Do you provide spectral transmittance test reports for each batch?
Yes, full spectral transmittance report, material certificate, scratch-dig and dimensional inspection data are supplied with every production batch.
