Optical Windows Manufacturer | Custom Precision Optical Components
Chenyu Optics is a custom optical windows manufacturer supplying precision optical components to global B2B customers. Production covers sapphire windows, fused silica windows, infrared windows and laser windows in materials including CaF₂, BaF₂, ZnSe, ZnS, germanium and silicon, spanning UV to LWIR wavelength ranges. Drawing-based manufacturing with custom dimensions, surface quality, flatness, parallelism and coating options.
Optical Windows Overview
Optical windows are flat optical components designed to transmit light across a defined wavelength range while protecting the internal optical system from contamination, pressure or environmental exposure. As a custom optical windows manufacturer, Chenyu Optics produces windows from multiple substrate materials to meet specific wavelength, surface quality, flatness, dimensional and coating requirements.
Material range includes sapphire, fused silica, calcium fluoride (CaF₂), barium fluoride (BaF₂), zinc selenide (ZnSe), zinc sulfide (ZnS), germanium and silicon, covering deep UV through visible, near-infrared and long-wave infrared applications including laser windows and infrared windows.
Chenyu Optics manufactures each optical window to customer drawings, with in-house precision polishing, optical coating and dimensional inspection supporting projects from prototype quantities through OEM production volume.
Optical Window Materials
Select a material to view specifications, transmission data and ordering options.
Sapphire Optical Windows
High hardness and excellent durability for demanding optical systems.
Transmission: 0.2 – 5 μm
Applications: Laser / Imaging
Fused Silica Optical Windows
UV-grade transmission with low thermal expansion for laser and scientific systems.
Transmission: 0.18 – 2.5 μm
Applications: Laser / UV Optics
Calcium Fluoride Optical Windows
Low absorption across a broad UV-to-MWIR range for spectroscopy and infrared systems.
Transmission: 0.2 – 8 μm
Applications: Spectroscopy / MWIR Imaging
Barium Fluoride Optical Windows
Widest transmission range among fluoride materials for broadband infrared applications.
Transmission: 0.2 – 12 μm
Applications: FTIR / Broadband IR Sensors
Zinc Sulfide Optical Windows
Durable visible-to-LWIR transmission for thermal imaging and EO/IR sensor windows.
Transmission: 0.4 – 14 μm
Applications: Thermal Imaging / EO-IR Sensors
Zinc Selenide Optical Windows
Low absorption at 10.6 μm for CO₂ laser output and LWIR imaging systems.
Transmission: 0.5 – 16 μm
Applications: CO₂ Laser / LWIR Imaging
Germanium Optical Windows
High refractive index for efficient MWIR–LWIR transmission in thermal camera systems.
Transmission: 2 – 14 μm
Applications: Thermal Cameras / FLIR
Silicon Optical Windows
Lightweight and cost-effective substrate for IR imaging sensors and airborne optics.
Transmission: 1.2 – 15 μm
Applications: IR Sensors / Airborne Optics
Optical Window Material Comparison
Reference guide for selecting optical window material based on wavelength range and application.
| Material | Transmission Range | Key Advantages | Typical Applications |
|---|---|---|---|
| Sapphire | 0.2 – 5 μm | Mohs 9 hardness, chemical and thermal resistance | High-pressure viewports, defense EO/IR, harsh environments |
| Fused Silica | 0.18 – 2.5 μm | UV-grade transmission, low thermal expansion | UV optics, laser windows, spectroscopy, semiconductor inspection |
| Calcium Fluoride (CaF₂) | 0.2 – 8 μm | Low absorption, broadband UV to MWIR | FTIR spectroscopy, MWIR imaging, cryogenic systems |
| Barium Fluoride (BaF₂) | 0.2 – 12 μm | Widest transmission range among fluorides | Infrared spectroscopy, FTIR, broadband IR sensors |
| Zinc Sulfide (ZnS) | 0.4 – 14 μm | Durable, visible to LWIR transmission | Thermal imaging, EO/IR sensor protective windows |
| Zinc Selenide (ZnSe) | 0.5 – 16 μm | Low absorption at 10.6 μm CO₂ laser wavelength | CO₂ laser output windows, LWIR thermal cameras |
| Germanium (Ge) | 2 – 14 μm | High refractive index, efficient MWIR–LWIR transmission | Thermal cameras, FLIR systems, LWIR optics |
| Silicon (Si) | 1.2 – 15 μm | Lightweight, cost-effective for IR apertures | IR imaging sensors, airborne optics, volume IR production |
Custom Optical Window Manufacturing Capability
All optical windows are produced in-house. Polishing, coating and inspection are not outsourced.
Custom Dimensions
Round, square, rectangular and special-shaped optical windows manufactured to customer drawings, with custom diameter, thickness, edge form, chamfer and clear aperture.
Precision Polishing
Surface quality from 60-40 scratch-dig to laser-grade 10-5, with flatness from λ/2 to λ/10 and parallelism to ≤10 arcsec for demanding optical systems.
Optical Coating
AR, broadband AR (BBAR), UV AR, NIR AR, IR AR, laser-line, high-reflection and DLC coatings, with custom designs for specific wavelengths or multi-band requirements.
Material Processing
Cutting, grinding, lapping and edging across sapphire, fused silica, optical glass and infrared crystal materials, matched to each substrate's processing requirements.
Quality Inspection
Dimensional, surface quality, flatness, parallelism and coating performance verified before every shipment, with material certificates available on request.
Why Choose Chenyu Optics
Chenyu Optics is a direct optical windows manufacturer. Production is handled in-house — material procurement, precision polishing, coating and inspection are not outsourced. Customers work directly with the manufacturer on specifications and delivery.
Applications of Optical Windows
Thermal Imaging
Infrared windows in ZnS, ZnSe, germanium and silicon for thermal cameras, FLIR systems and uncooled LWIR imaging equipment.
Laser Systems
Laser windows in fused silica, sapphire and ZnSe for CO₂ laser, Nd:YAG and UV excimer laser applications.
Machine Vision
Protective optical windows for industrial cameras, inspection modules and automated optical systems.
Spectroscopy
CaF₂ and BaF₂ optical windows for FTIR spectrometers and broadband UV-to-infrared analytical instruments.
Scientific Instruments
Optical windows for vacuum chambers, cryostats, spectrometers and laboratory instrument systems.
Aerospace Optics
High-durability sapphire and silicon optical windows for airborne sensors and defense EO/IR systems.
Optical Windows FAQ
What materials are available for optical windows?
Chenyu Optics produces optical windows in sapphire, fused silica (JGS1, JGS2, JGS3, Corning), calcium fluoride (CaF₂), barium fluoride (BaF₂), zinc selenide (ZnSe), zinc sulfide (ZnS), germanium (Ge) and silicon (Si). The available materials span wavelengths from 0.15 μm (deep UV) to 16 μm (LWIR).
Can you manufacture custom optical windows?
Yes. Chenyu Optics manufactures optical windows to customer drawings. Dimensions, shape, thickness tolerance, surface quality, flatness, parallelism, chamfer, clear aperture and coating can all be specified. Round, square, rectangular and non-standard geometries are supported, from prototype quantities to repeat OEM orders.
What coating options are available?
Standard coatings include UV AR, visible AR, NIR AR, broadband AR (BBAR), IR AR, laser-line AR (266 nm, 355 nm, 532 nm, 1064 nm, 10.6 μm), high-reflection and DLC coatings. Uncoated bare substrate is also available, and custom coating designs can be produced for specific wavelengths or multi-band requirements.
What optical tolerances can you achieve?
Thickness tolerances from ±0.1 mm to ±0.02 mm, surface quality from 60-40 scratch-dig to laser-grade 10-5, flatness from λ/2 to λ/10 at 632.8 nm, and parallelism from ≤3 arcmin to ≤10 arcsec, depending on material and application requirements.
Do you provide inspection reports?
Yes. Dimensional, surface quality, flatness, parallelism and coating performance are verified before every shipment. Material certificates and inspection reports are available on request to support incoming quality control on the customer side.
How can I request a quotation?
Send your material, wavelength range, dimensions, surface quality, flatness, coating and quantity to /contact/. Chenyu Optics will review the specifications and provide a production recommendation and quotation.
Need Custom Optical Windows?
Send your drawings or specifications. Chenyu Optics provides precision optical window manufacturing from prototype to production, covering material, wavelength range, dimensions, surface quality, flatness, coating and quantity.