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Sapphire Window
Optical Windows

Sapphire Window

Supplier
Hchcrystal
Category
Optical Windows
Origin
China

Optical windows are plane plates with parallel or wedged faces, protecting sensors or external-environment detectors or serving as reflecting windows without changing magnification. Sapphire windows suit advanced applications needing hardness, transparency, heat resistance, and corrosion resistance. Sensor protection: scratch resistance maintains clarity and measurement stability. Broadband transmission: UV-to-mid-IR transparency supports thermal imagers and IR spot thermometers for clear imaging and temperature measurement. Harsh environments: operation above 1000℃ and insolubility in water and common acids or alkalis benefit industry, defense, and research. Safe viewing: electrical cabinets and hot equipment use windows to inspect internally and support preventive maintenance while protecting users from electromagnetic radiation, voltage, and heat. Lasers and demanding systems benefit from hardness, thermal conductivity, dielectric constant, and chemical resistance. These properties give sapphire an important role in advanced optics.

Specification Snapshot
Dimensions
Diameter Within 300mm; Maximum Diagonal of Noncircular Parts Within 300mm
Thickness [Ultrathin Plate Diameter-to-Thickness Ratio <500:1]
0.05-300mm
Parallelism
10″
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Overview

Optical windows are plane plates with parallel or wedged faces, protecting sensors or external-environment detectors or serving as reflecting windows without changing magnification. Sapphire windows suit advanced applications needing hardness, transparency, heat resistance, and corrosion resistance. Sensor protection: scratch resistance maintains clarity and measurement stability. Broadband transmission: UV-to-mid-IR transparency supports thermal imagers and IR spot thermometers for clear imaging and temperature measurement. Harsh environments: operation above 1000℃ and insolubility in water and common acids or alkalis benefit industry, defense, and research. Safe viewing: electrical cabinets and hot equipment use windows to inspect internally and support preventive maintenance while protecting users from electromagnetic radiation, voltage, and heat. Lasers and demanding systems benefit from hardness, thermal conductivity, dielectric constant, and chemical resistance. These properties give sapphire an important role in advanced optics.

Specifications

ParameterValue
DimensionsDiameter Within 300mm; Maximum Diagonal of Noncircular Parts Within 300mm
Thickness [Ultrathin Plate Diameter-to-Thickness Ratio <500:1]0.05-300mm
Parallelism10″
Thickness Uniformity [150mm]<2μm@150mm
Surface Finish80/50, 60/40, 40/20, 20/10, 10/5 Options
Surface Flatness [632.8mm]PV：RMS≤1/4λ@632.8mm
CoatingAntireflection or Cutoff Coating According to Customer Requirements
PackagingTray Packaging or Dust-Free Vacuum Packaging

Applications

Infrared inspection equipment such as thermal imagers and infrared spot thermometers; observation windows for hazardous areas including electrical cabinets and high-temperature equipment; applications with stringent optical-component requirements, such as laser systems; protection for underwater detection, high-temperature environments, oilfield exploration, pressure vessels, chemical facilities and high-power laser operations; sapphire reflective windows for optical tracking, measurement and fiber-optic reflection.

Key Features

High purity: Kyropoulos (KY) sapphire has total impurities <2ppm and low UV absorption/high transmission. High surface quality: at least 40/20, roughness <0.2nm, transmitted figure better than 1/20. No chips, missing corners, or internal cracks are permitted, since propagation can cause failure/scrap. Sapphire windows are uncoated or coated for required transmission/blocking. Coated windows: one-/two-sided coatings increase selected-band transmission from 85% to 92%-98% within 280-5500nm, or provide blocking. High-threshold coatings optimized with materials serve intense lasers. UV-grade windows: sapphire normally begins UV transmission at 220nm. Low-absorption KY windows extend onset to 168nm; suitable coatings broaden/deepen applications. Transmission windows: the most common use. High transmitted figure/surface quality support imaging, intense lasers, and precision measurement. Wavefront distortion reaches 1/20λ, surface quality 10/5, roughness <0.5nm. Single-face reflective windows: optical tracking, measurement, and fiber reflection increasingly replace silica because of sapphire stability. Single-face PV reaches 1/20λ, surface quality 10/5, roughness <0.5nm. Metal reflective and AR coatings are available. Protective windows: sapphire physicochemical properties protect internal instruments or seal containers under heat, pressure, corrosion, and other conditions, isolating environments/observers. Types include pressure-resistant, high-temperature, deep-water, and chemical-corrosion windows. Uses include underwater exploration, hot environments, oilfield exploration, pressure vessels, chemicals, and high-power laser protection.

Datasheet

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Supplier Information

Hc
Hchcrystal
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Taixing Harmocen Crystal Technology Co., Ltd. is located in Taixing City, Jiangsu Province, with convenient transportation. The company's main products include sapphire windows, sapphire tubes, sapphire precision components, sapphire substrates, infrared crystal optical products (zinc selenide, zinc sulfide, germanium single crystal, fluorides, etc.), and UV/IR quartz optical products, among which large-sized high-surface-accuracy sapphire/quartz products are well-known in the market. The company has a technical R&D team, a highly skilled workforce, and a complete set of processing and testing equipment, capable of processing products as thin as 0.015mm. Its products are widely used in deep-sea exploration, high-speed rail monitoring, oilfield monitoring, aerospace and other fields. With the core value of 'Harmony but not Uniformity, Sincerity to the World', the company is committed to narrowing the gap with international advanced levels and providing high-precision, low-cost sapphire and infrared crystal products.

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