Custom Optical Windows Manufacturer
Tihot-Optics designs and manufactures custom optical windows for UV, visible, and IR applications. With over a decade of precision optics experience, we deliver high-quality windows for scientific, medical, semiconductor, and laser use.
Optical Windows Product
We offer a wide range of optical substrates to cover different wavelength regions and environmental conditions:
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Customization & Coating Capabilities
We maintain tight manufacturing tolerances for all optical windows to ensure outstanding optical performance:
| Parameter | Precision Grade | Factory Standard | Commercial Grade |
|---|---|---|---|
| Dimensional Tolerance | ±0.01 mm | ±0.03 mm | ±0.05 mm |
| Thickness Tolerance | ±0.005 mm | ±0.02 mm | ±0.05 mm |
| Flatness (PV) | PV < λ/50 | PV < λ/10 | PV < λ/4 |
| Surface Quality (Scratch/Dig) | 5–1 | 10–5 | 40–20 |
| Roughness | RMS < 0.3 nm | RMS < 0.8 nm | RMS < 1 nm |
| Parallelism | < 2 arcsec | < 10 arcmin | < 30 arcmin |
| Chamfer | < 0.05 mm × 45° | < 0.15 mm × 45° | < 0.3 mm × 45° |
| Coating | Filter Coating / AR / HR | Standard Coating | Optional |
What Are Optical Windows?
An optical window is a transparent optical element that allows light to pass through a specific wavelength range while protecting internal components from the external environment. They are optically polished on both surfaces to achieve high transmission and minimal reflection.
Depending on the material, optical windows can cover spectral ranges from UV (200 nm) to far-infrared (10 μm). We produce optical windows in circular, rectangular, elliptical, and irregular shapes with custom surface finishes and coatings.
Custom Manufacturing Capability
Tihot-Optics can produce optical windows from 1.0 mm to 1200 mm in diameter, with thickness as low as 0.17 mm.
Shapes can be circular, rectangular, elliptical, or irregular—manufactured via CNC machining and laser cutting to meet precise dimensional requirements.
Our engineering team works directly with optical designers to optimize performance through virtual simulation and tolerance analysis. This ensures the perfect balance between cost, manufacturability, and optical efficiency.
Applications of Optical Windows
Our optical windows are widely used across diverse high-precision industries, serving as protective, transmissive, and optical interfaces in advanced systems.
Our optical windows are widely used in:
Applications of Optical Windows
Medical Devices
Used in endoscopes, laser beauty systems, and CT scanners for optical protection and clarity.Laser Systems
Applied in laser cutting, welding, and marking equipment with AR or laser-protective coatings.Semiconductor Equipment
Used as viewports in wafer inspection, lithography, and metrology systems.Aerospace & Space
Integrated into satellite optics, star trackers, and imaging sensors for high stability and durability.Defense & Security
Used in night vision, laser sights, and ITO-coated goggles for rugged optical protection.Scientific Instruments
Found in spectrometers, interferometers, and sensors for precise UV–IR light transmission.
FAQs about ITO/FTO Coated Glass
What materials are optical windows made from?
Optical windows can be made from various optical materials depending on wavelength and environmental conditions, including:
N-BK7 for visible and near-IR applications
Fused Silica (UVFS / IRFS) for UV to IR transmission
Sapphire for durability and scratch resistance
CaF₂ (Calcium Fluoride) for UV to mid-IR
ZnSe for CO₂ laser and infrared systems
MgF₂ for UV transparency
Silicon (Si) for IR imaging
Each material offers unique advantages in transmission range, hardness, and cost.
What is the difference between an optical window and a lens?
An optical window is a flat, transparent plate that does not alter the light path—it only allows light to pass through while protecting the system.
A lens, on the other hand, has a curved surface designed to focus or diverge light. Windows are primarily for protection, lenses are for focusing or imaging.
What coating options are available for optical windows?
We provide a wide range of coatings tailored to specific wavelengths and applications:
AR (Anti-Reflective) Coating: Improves transmission and minimizes surface reflection.
Dielectric Coating: For high-power laser protection or wavelength-specific reflection.
Mirror Coating: For beam steering or reflective surfaces.
Beamsplitter / Filter Coating: For optical measurement and imaging systems.
Custom single- or double-sided coatings are available for UV, visible, or IR ranges.
What surface quality and flatness can you achieve?
We offer multiple precision levels:
Flatness: Up to PV < λ/50
Surface Quality: Up to 5–1 (MIL-PRF-13830B standard)
Parallelism: < 2 arcsec
Surface Roughness: RMS < 0.3 nm
These tolerances ensure minimal optical distortion and high transmission performance.
Precision-engineered optical filters for demanding optical and photonic applications. Delivering reliable wavelength control, transmission accuracy, and surface quality from UV to IR spectra.