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Flat Windows (Surface Flatness: lambda/4)

Optical BaF2 Barium Fluoride Protective Window
Henan UM Optics Ltd
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Optical BaF2 Barium Fluoride Protective Window
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Barium fluoride (BaF2) windows are high-performance optical components known for their broad spectral transparency, spanning from the ultraviolet to the infrared  regions, with exceptional transmission efficiency in the IR spectrum. Their low refractive index minimizes surface reflection losses, optimizing light throughput in ...

Specifications
Substrate Material: BaF2
Antireflection Coating: N/A
Diameter: 6 mm
Surface Quality: 60-40 scratch-dig
Surface Flatness: lambda/4
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Germanium Optics
Sinoptix
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Germanium Optics
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Sinoptix’s Optical Germanium Components are engineered for exceptional performance in infrared (IR) applications, particularly in the 8–14 µm thermal range. Germanium (Ge), a metalloid with a high refractive index (~4.0), provides outstanding IR transmission (1.8–23 µm), low optical dispersion, and ...

Specifications
Substrate Material: Ge, CaF2, IR Grade CaF2, MgF2, BaF2, Si
Antireflection Coating: Coated, Uncoated
Diameter: 350 mm
Surface Quality: 10-5 scratch-dig, 20-10 scratch-dig, 40-20 scratch-dig, 60-40 scratch-dig, 80-50 scratch-dig
Surface Flatness: lambda/20, lambda/10, lambda/8, lambda/6, lambda/4, lambda/2, 1 lambda, Lambda/40, Other
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Optical Sapphire Glass Window
Henan UM Optics Ltd
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Optical Sapphire Glass Window
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Sapphire window is one of the basic optical components in optics, usually used as a protective window for electronic sensors or external environment detectors. It is used to separate the environment on both sides, such as separating the inside and outside of the instrument, so that the inside and outside of the instrument are ...

Specifications
Substrate Material: Sapphire
Antireflection Coating: Coated
Diameter: 6 mm
Surface Quality: 60-40 scratch-dig
Surface Flatness: lambda/4
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High-Precision ZnSe Window for Infrared Optics
Sinoptix
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High-Precision ZnSe Window for Infrared Optics
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The High-Precision ZnSe (Zinc Selenide) Window is specifically designed for advanced infrared (IR) optical applications, offering superior transmission across the infrared spectrum. ZnSe is a highly transparent material in the IR region, making it an ideal choice for IR laser systems, thermal imaging, and spectroscopy. With a low ...

Specifications
Substrate Material: ZnSe
Antireflection Coating: Uncoated
Diameter: 300 mm
Surface Quality: 20-10 scratch-dig
Surface Flatness: lambda/10, lambda/8, lambda/6, lambda/4, lambda/2, 1 lambda
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High-Precision MgF₂ Window for UV and IR Optics
Sinoptix
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High-Precision MgF₂ Window for UV and IR Optics
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The High-Precision MgF₂ (Magnesium Fluoride) Window is an essential optical component designed for both UV and infrared (IR) applications. With exceptional transmission properties across a wide spectral range, from ultraviolet (UV) to infrared (IR), this window is ideal for use in spectroscopic instruments, laser systems, and ...

Specifications
Substrate Material: MgF2
Antireflection Coating: Coated, Uncoated
Diameter: 160 mm
Surface Quality: 10-5 scratch-dig, 20-10 scratch-dig
Surface Flatness: lambda/10, lambda/8, lambda/6, lambda/4, lambda/2, 1 lambda
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High-Precision BaF₂ Window for Infrared Optics
Sinoptix
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High-Precision BaF₂ Window for Infrared Optics
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The High-Precision BaF₂ (Barium Fluoride) Window is an essential optical component designed for infrared (IR) optical applications. Known for its excellent transmission across a wide IR wavelength range, this window is ideal for use in spectroscopic instruments, thermal imaging systems, and high-performance IR lasers. The BaF₂ ...

Specifications
Substrate Material: BaF2
Antireflection Coating: Coated
Diameter: 200 mm
Surface Quality: 10-5 scratch-dig, 20-10 scratch-dig
Surface Flatness: lambda/10, lambda/8, lambda/6, lambda/4, lambda/2, 1 lambda
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High-Precision CaF₂ Window for UV and Broadband Optics
Sinoptix
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High-Precision CaF₂ Window for UV and Broadband Optics
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The High-Precision CaF₂ (Calcium Fluoride) Window is a superior optical component designed for UV and broadband optical applications. Manufactured from high-quality CaF₂ material, these windows are highly transparent across a wide range of wavelengths, from ultraviolet (UV) to infrared (IR), making them ideal for demanding optical ...

Specifications
Substrate Material: CaF2
Antireflection Coating: Coated
Diameter: 320 mm
Surface Quality: 20-10 scratch-dig, 40-20 scratch-dig, 60-40 scratch-dig
Surface Flatness: lambda/10, lambda/8, lambda/6, lambda/4, lambda/2, 1 lambda
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High-Quality Silicon Wafer for Semiconductor and Photonics Applications
Sinoptix
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High-Quality Silicon Wafer for Semiconductor and Photonics Applications
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The High-Quality Silicon Wafer is engineered to meet the demanding requirements of the semiconductor and photonics industries. Available in a wide range of sizes and configurations, these wafers are made from CZ (Czochralski) or FZ (Float Zone) silicon, providing exceptional purity and crystal structure. With diameters ranging from ...

Specifications
Substrate Material: Si
Antireflection Coating: Uncoated
Diameter: 304.8 mm
Surface Quality: 20-10 scratch-dig, 40-20 scratch-dig
Surface Flatness: lambda/4
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Sapphire Wafer for Semiconductor and Photonics Applications
Sinoptix
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Sapphire Wafer for Semiconductor and Photonics Applications
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The Sapphire Wafer is an advanced optical component designed specifically for the semiconductor and photonics industries. Manufactured from 99.999% pure AL₂O₃ monocrystalline sapphire, it offers unparalleled durability and performance. With customizable dimensions ranging from 1 inch (25.4 mm) to 8 inches (203.2 mm) and thickness ...

Specifications
Substrate Material: Sapphire
Antireflection Coating: Uncoated
Diameter: 203.2 mm
Surface Quality: 60-40 scratch-dig
Surface Flatness: lambda/4
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Silicon Optical Window for Infrared Applications
Sinoptix
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Silicon Optical Window for Infrared Applications
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The Silicon Optical Window is engineered for high-performance applications in infrared optics. Constructed from premium optical-grade silicon, this window boasts a standard diameter of 108mm, with the flexibility to customize dimensions to meet specific project needs. The BBAR (Broadband Anti-Reflective) coating significantly ...

Specifications
Substrate Material: Si
Antireflection Coating: Coated
Diameter: 100 mm
Surface Quality: 20-10 scratch-dig
Surface Flatness: lambda/4
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Optical Fused Silica Quartz Glass Laser Protective Window
Henan UM Optics Ltd
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Optical Fused Silica Quartz Glass Laser Protective Window
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Quartz windows are optical glass that have been ground and polished to form two surfaces parallel to each other. They are commonly used as protective devices for electronic sensors, optical lenses, and laser devices. With high transmittance, good heat resistance, and excellent environmental durability, fused silica windows are well ...

Specifications
Substrate Material: Fused Silica, UV Grade Fused Silica, IR Grade Fused Silica, Sapphire
Antireflection Coating: N/A
Diameter: 6 mm
Surface Quality: 10-5 scratch-dig, 20-10 scratch-dig, 40-20 scratch-dig, 60-40 scratch-dig, 80-50 scratch-dig
Surface Flatness: lambda/20, lambda/10, lambda/8, lambda/6, lambda/4, lambda/2, 1 lambda, Lambda/40
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CaF2 Calcium Fluoride Protective Window
Henan UM Optics Ltd
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CaF2 Calcium Fluoride Protective Window
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Windows are optical glass that have been ground and polished to form two surfaces parallel to each other. They are commonly used as protective devices for electronic sensors, optical lenses, and laser devices. Windows do not change the magnification of the system. The window piece does not change the magnification of the system. ...

Specifications
Substrate Material: N-BK7, Fused Silica, UV Grade Fused Silica, IR Grade Fused Silica, Sapphire, Ge, ZnSe, ZnS, CaF2, IR Grade CaF2, MgF2, BaF2, Si
Antireflection Coating: N/A
Diameter: 6 mm
Surface Quality: 10-5 scratch-dig, 20-10 scratch-dig, 40-20 scratch-dig, 60-40 scratch-dig, 80-50 scratch-dig
Surface Flatness: lambda/20, lambda/10, lambda/8, lambda/6, lambda/4, lambda/2, 1 lambda, Lambda/40
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BK7 Optical Window with Large Incidence Angle Antireflection Coating
Fuzhou HCT Optics Co.,LTD
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BK7 Optical Window with Large Incidence Angle Antireflection Coating
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Optical windows are often used in optical instruments, such as telescopes, microscopes, lasers, spectrometers, etc. They act as windows in the optical path to protect the interior of the optical system from the external environment and allow light to enter or leave the system.

Specifications
Substrate Material: N-BK7
Antireflection Coating: Coated
Diameter: 15 mm
Surface Quality: 20-10 scratch-dig
Surface Flatness: lambda/4
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Optical Sapphire Window with AR Coating
MOK Optics Co LTD
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Optical Sapphire Window with AR Coating
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Sapphire (Al2O3) is a highly versatile material renowned for its exceptional properties. It possesses a high surface hardness, excellent temperature resistance, good thermal conductivity, and impressive UV-IR transmittance. Additionally, sapphire exhibits remarkable chemical stability. These characteristics make sapphire an ideal ...

Specifications
Substrate Material: Sapphire
Antireflection Coating: Coated
Diameter: 2 mm
Surface Quality: 10-5 scratch-dig, 20-10 scratch-dig, 40-20 scratch-dig, 60-40 scratch-dig, 80-50 scratch-dig
Surface Flatness: lambda/4, lambda/2, 1 lambda
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Industrial Sapphire Windows
Sapphcom Sapphire Competence
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Industrial Sapphire Windows
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Sapphcom Sapphire Competence offers a wide range of industrial sapphire products and services. We specialize in offering sapphire optics products (windows, lenses, prisms) and customized parts and prototypes. We also offer consulting to help customers implement sapphire in their specific applications. 

Specifications
Substrate Material: Sapphire
Antireflection Coating: Coated, Uncoated
Diameter: 350 mm
Surface Quality: 10-5 scratch-dig, 20-10 scratch-dig, 40-20 scratch-dig, 60-40 scratch-dig, 80-50 scratch-dig
Surface Flatness: lambda/10, lambda/8, lambda/6, lambda/4, lambda/2, 1 lambda
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Custom High-Precision Polished Sapphire Optical Windows for Advanced Optical Applications
ARD-OPTICS
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Custom High-Precision Polished Sapphire Optical Windows for Advanced Optical Applications
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Experience cutting-edge performance with ARD-OPTICS High-Precision Optical Windows, made from top-quality sapphire and other glass materials. Our optical windows boast exceptional specifications, including surface quality up to S/D-10/5 according to MIL-PRF-13830B, surface flatness up to lambda/10 @632nm, and parallelism of polished ...

Specifications
Substrate Material: N-BK7, Fused Silica, UV Grade Fused Silica, IR Grade Fused Silica, Sapphire, MgF2, Other
Antireflection Coating: Uncoated
Diameter: 5 mm
Surface Quality: 20-10 scratch-dig, 40-20 scratch-dig, 60-40 scratch-dig, 80-50 scratch-dig
Surface Flatness: lambda/10, lambda/8, lambda/6, lambda/4, lambda/2, 1 lambda
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Sapphire Optics
Sinoptix
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Sapphire Optics
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Used mostly for their very high hardness, sapphire optics are also used for their good transmission from UV to NIR. Due to the increase of actors in the sector, sapphire components prices decreased a lot in recent years, don\'t hesitate to challenge your current supply.  https://sinoptix.fr/sapphire/

Specifications
Substrate Material: Sapphire
Antireflection Coating: Coated, Uncoated
Diameter: 350 mm
Surface Quality: 10-5 scratch-dig, 20-10 scratch-dig, 40-20 scratch-dig, 60-40 scratch-dig, 80-50 scratch-dig, Not Specified
Surface Flatness: lambda/20, lambda/10, lambda/8, lambda/6, lambda/4, lambda/2, 1 lambda, Lambda/40, Other, Not Specified
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Sapphire Window
BoJen Optics, Inc.
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Sapphire Window
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Uncoated sapphire provides exceptional surface hardness and a transmission range extending from the UV to the MIR. It can only be scratched by a few materials other than itself. The uncoated substrate is chemically inert and insoluble to water, common acids, or alkalis at temperatures up to ~1,000 °C. Sapphire windows are ...

Specifications
Substrate Material: Sapphire
Antireflection Coating: Uncoated
Diameter: 20 mm
Surface Quality: 40-20 scratch-dig
Surface Flatness: lambda/4
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RMI Parallel Windows - Sapphire
Rocky Mountain Instrument Co.
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RMI Parallel Windows - Sapphire
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Parallel Windows are similar to Plane Windows, but with parallel surfaces. These windows are well suited for applications in which angular deviation of the transmitted beam must be kept as small as possible. Misalignment errors are also minimized when the window is repeatedly inserted and removed. Round, square, and rectangular ...

Specifications
Substrate Material: Sapphire
Antireflection Coating: Coated, Uncoated
Diameter: Not Specified
Surface Quality: 20-10 scratch-dig
Surface Flatness: lambda/4
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RMI Parallel Windows - CaF2 - IR Grade CaF2 - MgF2 - BaF2
Rocky Mountain Instrument Co.
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RMI Parallel Windows - CaF2 - IR Grade CaF2 - MgF2 - BaF2
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Parallel Windows are similar to Plane Windows, but with parallel surfaces. These windows are well suited for applications in which angular deviation of the transmitted beam must be kept as small as possible. Misalignment errors are also minimized when the window is repeatedly inserted and removed. Round, square, and rectangular ...

Specifications
Substrate Material: CaF2, IR Grade CaF2, MgF2, BaF2
Antireflection Coating: Coated, Uncoated
Diameter: Not Specified
Surface Quality: 20-10 scratch-dig
Surface Flatness: lambda/4
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On FindLight marketplace you will find 22 different Flat Windows (Surface Flatness: lambda/4) from top global suppliers. Compare features, request pricing, and connect instantly with manufacturers — no registration required.