Precision MWIR/LWIR Optics
IRG206 Chalcogenide Aspheric Lenses | 0.8–19 µm Broadband Optics
Custom IRG206 chalcogenide aspheric lenses (0.8–19 µm) for thermal imaging and unmanned systems. Sub-5nm roughness, form error < λ/80. RFQ today.
Product Overview
IRG206 chalcogenide glass aspheric lenses deliver exceptional optical performance across a broad infrared spectrum from 0.8 µm to 19 µm, covering both mid-wave infrared (MWIR) and long-wave infrared (LWIR) bands. Characterized by a refractive index of 2.7764 at 10.6 µm, a high Abbe number of 137.71, and low thermo-optic coefficient (dn/dT), IRG206 provides optical designers with a reliable, thermal-stable alternative to conventional germanium optics in passive athermalized infrared systems. Manufactured via precision glass molding and single-point diamond turning (SPDT), OPTOStokes supplies custom IRG206 aspheric optical components tailored for high-volume OEM integration, thermal imaging payloads, and industrial inspection instruments.
Technical Specifications
| Parameter | Specification Value |
|---|---|
| Substrate Material | IRG206 Chalcogenide Glass |
| Transmission Spectrum Range | 0.8 µm – 19 µm |
| Clear Aperture Range (Diameter) | 1 mm – 700 mm |
| Surface Form Error (PV) | Better than λ/80 |
| Surface Roughness (RMS) | < 5 nm |
| Surface Quality (Scratch-Dig) | Not specified |
| Coating Options | Uncoated / Custom AR Coatings available upon request |
Material & Physical Properties
| Property | Value / Condition |
|---|---|
| Refractive Index (n10.6) | 2.7764 |
| Refractive Index (n4.0) | Not specified |
| Abbe Number (ν10.6) | 137.71 |
| Abbe Number (ν4.0) | Not specified |
| Glass Transition Temperature (Tg) | 184 °C |
| Density (ρ) | 4.63 g/cm³ |
Engineering & Manufacturing Capabilities
Aspheric surfaces allow optical engineers to eliminate spherical aberration, simplify optical train designs, and significantly reduce system size and weight compared to multi-element spherical lens assemblies. By combining diamond turning and precision molding techniques, OPTOStokes manufactures IRG206 aspheric lenses with surface roughness under 5 nm RMS and surface form error exceeding λ/80. Diameters ranging from 1 mm micro-optics to 700 mm large-aperture elements are custom-fabricated according to OEM specifications.
Applications
Due to its broad infrared transparency and low thermal drift, IRG206 aspheric optics are ideal for demanding thermal sensing and vision technologies, including:
Unmanned Systems: Lightweight MWIR/LWIR optics for UAV/UGV gimbals, surveillance payloads, and autonomous navigation.
Industrial Inspection: Thermal monitoring cameras, non-contact temperature measurement equipment, and predictive maintenance sensors.
Infrared Spectroscopy & Gas Analysis: Broadband optical trains covering multispectral detection ranges.
OEM Infrared Assemblies: Compact, athermalized lens assemblies designed for harsh operating environments.
Selection & Engineering Notes
When selecting IRG206 for infrared system designs, consider the following technical factors:
Thermal Stability: With a glass transition temperature (Tg) of 184 °C, mechanical and thermal housing design must account for operational limits during processing and high-temperature environmental exposure.
Germanium Comparison: IRG206 offers lower density (4.63 g/cm³) and favorable dn/dT characteristics, making it an effective alternative to conventional germanium optics in weight-sensitive and passive athermal designs.
Coating Options: Custom anti-reflective (AR) or high-durability coatings can be applied to optimize transmission over target wavelength bands (3–5 µm MWIR, 8–12 µm LWIR, or custom multispectral bands).
Request a Quote / Custom Evaluation
OPTOStokes provides full custom fabrication services for IRG206 chalcogenide optical components. To receive a technical review and cost estimate, please submit your engineering drawings (STEP/IGES/PDF), target wavelength range, coating specs, operating temperature range, and estimated order quantity to our engineering team.