Optical Coatings & Custom Filters Capability
Table of Contents
Coligh utilizes multi-optical coating capabilities. Including sputtered coating technology and Ion-assisted deposition hard coating to provide a diverse range of high-precision optical filters, including single-band and multi-band bandpass filters, longpass filters, shortpass filters, and dichroic filters. These filters are tailored to meet the specific needs of customers in life science, Photonics imaging, sensing and detection, and Biomedical related applications
Optical filter type: Single band/Multibandpass filter, longpass filter, shortpass filter, dichroic filters, beam splitter, reflective mirror, anti reflection windows
Wavelength Range & Applicable Filter Types
| Filter type | Wavelength Range |
| OEM Wavelength | EUV – 20000nm (UV, VIS, NIR, SWIR, MWIR, LWIR) |
| Bandpass Filter | 200 – 10000nm |
| Longpass Filter | 200 – 20000nm |
| Shortpass Filter | 200 – 2000nm |
| Notch Filter | 500 – 1100nm |
| Reflective Type | EUV – 20000nm |
| Anti-Reflective Type | EUV – 20000nm |
Optical Performance
| Parameter | Specification |
| Filter Dimension | 4 – 200mm |
| Transmission | <=99% |
| Reflectivity | <=99.7% |
| FWHM | Narrow to 0.4nm |
| Clear Aperture | ≥90% of diameter，Up to 100% |
| AOI, Angle of Incidence | Up60° |
| Optical Density, OD | OD8 及以上 |
| Surface Quality | 80/50, 60/40, 40/20, 20/10 |
| Environmental & Physical Durability | Compliant with MIL-STD-810F and MIL-C-48497A standards |
IR Laser Optics Capability:
| Category | Specification |
| Substrate Materials | Germanium wafers, Silicon wafers, Chalcogenide materials, ZnSe, ZnS, CaF₂ |
| Thin Film Types | Beamsplitter type, High-reflective mirror, IR-cut filter, Anti-reflective |
| Germanium wafers with double-sided AR coating | 8-12 µm, Average Transmittance ≥ 97% |
| Germanium wafers | 4-12 µm, Average Transmittance ≈ 96% |
| Silicon wafers | 3-5 µm, Average Transmittance ≈ 98% |
| Germanium wafers with AR & DLC coating | 8-12 µm, Average Transmittance ≥ 91% |
| Silicon wafers with AR & DLC coating | 3-5 µm, Average Transmittance ≥ 85% |
| Chalcogenide materials (IRG201, IRG202, IRG204, IRG205, IRG206) | 8-12 µm, 8-14 µm, Average Transmittance ≥ 96% |
| ZnSe, ZnS, CaF₂ substrates | Anti-reflective film coated |
| Laser Damage Threshold | 20 J/cm² @ 1064nm (20ns, AR@1064nm) 7 J/cm² @ 532nm (20ns, AR@532nm) 5 J/cm² @ 355nm (20ns, AR@355nm) 15 J/cm² @ 1064&532nm (20ns, AR@1064&532nm) |
| Size Dimension | 5 – 200 mm |
| Size Tolerance | +0.0 / -0.1 mm |
| Flatness | 1/10 λ |
| Parallelism | 3′ |
Optical Prism Capabilities
| Category | Specification |
| Size | Customizable |
| Coating Range | UV / NIR / IR |
| Prism Processing Capacity | – |
| Angle Accuracy | 5″ |
| Surface Quality | 20-10 |
| Surface Accuracy | Within 1/10λ |
| Prism Difference | 1″ |
| Dimensional Accuracy | ±0.02 mm |
| Substrate Materials | NBK7, H-K9L, Float Glass, B270, UV Fused Silica, Zinc Selenide |
| Coating Options | Prisms can be delivered coated or uncoated (raw material) |
Aspherical Lens Capabilities
| Category | Specification |
| Materials | Optical glass, Quartz, Calcium Fluoride, Germanium, Silicon, Zinc Selenide |
| Focal Length | ±5mm ~ ±1000mm ±2% |
| Diameter | 10mm ~ 75mm (+0.0 / -0.2mm) |
| Thickness Tolerance | ±0.2mm |
| Surface Type | 3F(1f) |
| Finish | 60/40 ~ 80/50 |
| Eccentricity | < 5 arc min |
| Effective Aperture | > 90% |
| Chamfer | 0.2mm × 45° |
| Coating | AR Coating or Custom Design |
Spherical Lens Capabilities Table
| Category | Specification |
| Coating | Broadband AR Coating for UV, Visible, NIR, MWIR |
| Materials | Optical Glass, UV Fused Silica, IR Fused Silica, Calcium Fluoride (CaF₂), Magnesium Fluoride (MgF₂), Zinc Selenide (ZnSe), Germanium (Ge), Silicon (Si) |
| Lens Types | Plano-Convex, Bi-Convex, Plano-Concave, Bi-Concave, Positive Meniscus, Negative Meniscus |
| Refractive Index Tolerance | ±0.0002 |
| Diameter Tolerance | 0 / -0.008mm |
| Thickness Tolerance | ±0.1mm |
| Sag Tolerance | ±0.1mm |
| Focal Length Tolerance | ±0.5% |
| Eccentricity | 20″ |
| Surface Quality | 20-10 |
| Surface Accuracy (Flatness) | 0-1 Fringe |
| Local Surface Accuracy | 0.2 Fringe |
