Flat Windows

High-Precision Sapphire Substrates for LED Packaging and Micro Machining

High-Precision Sapphire Substrates for LED Packaging and Micro Machining

Our sapphire substrates are designed for high-end applications that demand exceptional durability, optical clarity, and thermal stability. Utilizing advanced micro-machining techniques, we offer substrates in ...

Sold by: Walthy Precision Co., Ltd. Ships from: China
Specifications
Substrate Material: Sapphire
Antireflection Coating: Uncoated
Diameter: 0.01 mm
Surface Quality: Not Specified
Surface Flatness: Other
High-Precision Laser Windows for Visible to Infrared Wavelengths

High-Precision Laser Windows for Visible to Infrared Wavelengths

CRYSTECH is a leading provider of high-precision windows for solid-state laser systems, boasting over 20 years of experience in the manufacturing, design, and coating of optical windows. Our expertise in this field ...

Sold by: CRYSTECH Inc. Ships from: China
Specifications
Substrate Material: N-BK7, Fused Silica, UV Grade Fused Silica, IR Grade Fused Silica, Sapphire
Antireflection Coating: Coated, Uncoated
Diameter: 10 mm
Surface Quality: 10-5 scratch-dig
Surface Flatness: lambda/10
Optical BaF2 Barium Fluoride Protective Window

Optical BaF2 Barium Fluoride Protective Window

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 ...

Sold by: Henan UM Optics Ltd Ships from: China
Specifications
Substrate Material: BaF2
Antireflection Coating: N/A
Diameter: 6 mm
Surface Quality: 60-40 scratch-dig
Surface Flatness: lambda/4
Germanium Optics

Germanium Optics

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 ...

Sold by: Sinoptix Ships from: Belgium
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
Optical Sapphire Glass Window

Optical Sapphire Glass Window

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, ...

Sold by: Henan UM Optics Ltd Ships from: China
Specifications
Substrate Material: Sapphire
Antireflection Coating: Coated
Diameter: 6 mm
Surface Quality: 60-40 scratch-dig
Surface Flatness: lambda/4
Optical Multispectral CVD ZnS Zinc Sulfide Window

Optical Multispectral CVD ZnS Zinc Sulfide Window

CVD zinc sulfide is an important material for long-wave infrared windows and is widely used in the fabrication of infrared windows, rectifiers and infrared optical components.UM OPTICS offers ZnS plano-convex lens ...

Sold by: Henan UM Optics Ltd Ships from: China
Specifications
Substrate Material: ZnS
Antireflection Coating: Coated
Diameter: 3 mm
Surface Quality: 60-40 scratch-dig
Surface Flatness: lambda/6
Durable Sapphire Windows – Scratch-Resistant & Optically Clear

Durable Sapphire Windows – Scratch-Resistant & Optically Clear

Sapphire windows offer exceptional durability, scratch resistance, and optical clarity, making them ideal for demanding applications. With a wide transmission range (0.2-5µm) and extreme hardness second only to ...

Specifications
Substrate Material: Sapphire
Antireflection Coating: Coated
Diameter: 500 mm
Surface Quality: 10-5 scratch-dig
Surface Flatness: lambda/10
High-Precision Optical Windows | Durable Protective Barriers for Sensors

High-Precision Optical Windows | Durable Protective Barriers for Sensors

Optical Windows are flat, plane-parallel plates that are often used as protective barriers for electronic sensors or detectors from outside environments. Optical Windows should be selected based on the material ...

Sold by: Minyi Technology Ships from: China
Specifications
Substrate Material: N-BK7, Fused Silica, UV Grade Fused Silica, Sapphire, Ge, CaF2, MgF2
Antireflection Coating: Uncoated
Surface Quality: 60-40 scratch-dig
Surface Flatness: lambda/2
Thickness: 0.2 mm
High-Precision ZnSe Window for Infrared Optics

High-Precision ZnSe Window for Infrared Optics

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 ...

Sold by: Sinoptix Ships from: Belgium
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
High-Precision MgF₂ Window for UV and IR Optics

High-Precision MgF₂ Window for UV and IR Optics

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 ...

Sold by: Sinoptix Ships from: Belgium
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
High-Precision BaF₂ Window for Infrared Optics

High-Precision BaF₂ Window for Infrared Optics

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 ...

Sold by: Sinoptix Ships from: Belgium
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
High-Precision CaF₂ Window for UV and Broadband Optics

High-Precision CaF₂ Window for UV and Broadband Optics

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 ...

Sold by: Sinoptix Ships from: Belgium
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
High-Quality Silicon Wafer for Semiconductor and Photonics Applications

High-Quality Silicon Wafer for Semiconductor and Photonics Applications

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 ...

Sold by: Sinoptix Ships from: Belgium
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
Sapphire Wafer for Semiconductor and Photonics Applications

Sapphire Wafer for Semiconductor and Photonics Applications

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 ...

Sold by: Sinoptix Ships from: Belgium
Specifications
Substrate Material: Sapphire
Antireflection Coating: Uncoated
Diameter: 203.2 mm
Surface Quality: 60-40 scratch-dig
Surface Flatness: lambda/4
High-Performance Diamond Optical Window

High-Performance Diamond Optical Window

The High-Performance Diamond Optical Window is meticulously engineered for applications requiring exceptional optical quality, particularly in terahertz (THz) technology and extreme environments. Constructed from ...

Sold by: Sinoptix Ships from: Belgium
Specifications
Substrate Material: Other
Antireflection Coating: Uncoated
Diameter: 25.4 mm
Surface Quality: 40-20 scratch-dig
Surface Flatness: lambda/2
MgO Optical Window for Advanced Research Applications

MgO Optical Window for Advanced Research Applications

The MgO Optical Window is a high-performance component designed specifically for advanced research applications in photonics and material science. Made from high-quality magnesium oxide (MgO), it offers excellent ...

Sold by: Sinoptix Ships from: Belgium
Specifications
Substrate Material: Other
Antireflection Coating: Uncoated
Diameter: 25.4 mm
Surface Quality: 60-40 scratch-dig
Surface Flatness: lambda/2
Silicon Optical Window for Infrared Applications

Silicon Optical Window for Infrared Applications

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 ...

Sold by: Sinoptix Ships from: Belgium
Specifications
Substrate Material: Si
Antireflection Coating: Coated
Diameter: 100 mm
Surface Quality: 20-10 scratch-dig
Surface Flatness: lambda/4
TPX Optical Window for Terahertz and Cryogenic Applications

TPX Optical Window for Terahertz and Cryogenic Applications

The TPX Optical Window is a specialized optical component designed for high-performance use in terahertz and cryogenic devices. Constructed from premium optical-grade TPX material, this window offers exceptional ...

Sold by: Sinoptix Ships from: Belgium
Specifications
Substrate Material: Other
Antireflection Coating: Uncoated
Diameter: 25.4 mm
Surface Quality: 60-40 scratch-dig
Surface Flatness: Not Specified
UV Narrowband AR-Coated Window 308nm M308-2AR-2D-FL (2.0” Diameter)

UV Narrowband AR-Coated Window 308nm M308-2AR-2D-FL (2.0” Diameter)

Acton Optics presents UV Narrowband AR-Coated Windows featuring durable, electron-beam–deposited dielectrics designed to minimize reflections occurring from uncoated surfaces of substrates. These ...

Sold by: Teledyne Acton Optics Ships from: United States
Specifications
Substrate Material: UV Grade Fused Silica
Antireflection Coating: Coated
Diameter: 50.8 mm
Surface Quality: 10-5 scratch-dig
Surface Flatness: lambda/20
UV Narrowband AR-Coated Window 308nm M308-2AR-1D-FL (1.0” Diameter)

UV Narrowband AR-Coated Window 308nm M308-2AR-1D-FL (1.0” Diameter)

Acton Optics presents UV Narrowband AR-Coated Windows featuring durable, electron-beam–deposited dielectrics designed to minimize reflections occurring from uncoated surfaces of substrates. These ...

Sold by: Teledyne Acton Optics Ships from: United States
Specifications
Substrate Material: UV Grade Fused Silica
Antireflection Coating: Coated
Diameter: 25.4 mm
Surface Quality: 10-5 scratch-dig
Surface Flatness: lambda/20
UV Narrowband AR-Coated Window 248nm M248-2AR-1D-FL (1.0” Diameter)

UV Narrowband AR-Coated Window 248nm M248-2AR-1D-FL (1.0” Diameter)

Acton Optics presents UV Narrowband AR-Coated Windows featuring durable, electron-beam–deposited dielectrics designed to minimize reflections occurring from uncoated surfaces of substrates. These ...

Sold by: Teledyne Acton Optics Ships from: United States
Specifications
Substrate Material: UV Grade Fused Silica
Antireflection Coating: Coated
Diameter: 25.4 mm
Surface Quality: 10-5 scratch-dig
Surface Flatness: lambda/20
UV Narrowband AR-Coated Window 248nm M248-2AR-2D-FL (2.0” Diameter)

UV Narrowband AR-Coated Window 248nm M248-2AR-2D-FL (2.0” Diameter)

Acton Optics presents UV Narrowband AR-Coated Windows featuring durable, electron-beam–deposited dielectrics designed to minimize reflections occurring from uncoated surfaces of substrates. These ...

Sold by: Teledyne Acton Optics Ships from: United States
Specifications
Substrate Material: UV Grade Fused Silica
Antireflection Coating: Coated
Diameter: 50.8 mm
Surface Quality: 10-5 scratch-dig
Surface Flatness: lambda/20
UV Narrowband AR-Coated Window 193nm M193-2AR-2D-FL (2.0” Diameter)

UV Narrowband AR-Coated Window 193nm M193-2AR-2D-FL (2.0” Diameter)

Acton Optics presents UV Narrowband AR-Coated Windows featuring durable, electron-beam–deposited dielectrics designed to minimize reflections occurring from uncoated surfaces of substrates. These ...

Sold by: Teledyne Acton Optics Ships from: United States
Specifications
Substrate Material: UV Grade Fused Silica
Antireflection Coating: Coated
Diameter: 50.8 mm
Surface Quality: 10-5 scratch-dig
Surface Flatness: lambda/20

Did You Know?

An optical flat by definition is a polished flat surface that can be used as a reference against which the flatness of an unknown surface may be compared by measurement. An optical flat utilizes the property of interference to exhibit the flatness on a desired surface. Optical flats are versatile optical components used in many applications, such as inspection of gauge blocks for wear and accuracy, as well as the testing of various components including windows, prisms, filters, mirrors, etc. Optical flats are sometimes given an optical coating and used as precision mirrors for special purposes, such as in a Fabry–Pérot interferometer or laser cavity.

Flat laser windows are essential components in optical systems, serving as protective barriers that allow light to pass through with minimal distortion. These windows are designed to maintain the integrity of laser beams while shielding sensitive equipment from environmental factors.

Understanding Flat Laser Windows

Flat laser windows are optically polished, plane-parallel substrates made from materials with excellent transparency and minimal absorption at specific wavelengths. Their primary function is to transmit laser beams without altering their path or quality. To achieve this, these windows must exhibit high surface quality, precise flatness, and appropriate coatings to minimize reflections and resist laser-induced damage.

Key Materials Used

The performance of a flat laser window heavily depends on the material chosen. Common materials include:

  • Fused Silica: Known for its broad transmission range (185 nm to 2.1 µm) and low thermal expansion, making it suitable for high-power laser applications.

  • N-BK7 Glass: Offers excellent transmission in the visible to near-infrared range (350 nm to 2 µm) and is cost-effective for general-purpose applications.

  • Calcium Fluoride (CaF₂): Provides low absorption and high transmission from 180 nm to 8 µm, ideal for ultraviolet to infrared applications.

  • Sapphire: Extremely hard and durable, with a transmission range of 200 nm to 5 µm, suitable for harsh environments.

  • Magnesium Fluoride (MgF₂): Offers good transmission from 200 nm to 6 µm and is resistant to thermal and mechanical shock.

Coating Options

To enhance performance, flat laser windows often feature anti-reflective (AR) coatings tailored to specific wavelengths. These coatings reduce surface reflections, increase transmission, and improve resistance to laser-induced damage. For instance, V-coated laser windows are designed with AR coatings centered around common lasing wavelengths, providing high damage thresholds suitable for industrial and laser protection applications.

Applications

Flat laser windows are utilized across various industries and applications:

  • Laser Systems: Protect internal components while allowing laser beams to pass through without distortion.

  • Medical Devices: Used in laser-based diagnostic and therapeutic equipment to ensure patient safety and equipment longevity.

  • Industrial Processing: Incorporated into cutting, welding, and engraving machines to shield optics from debris and contaminants.

  • Scientific Research: Employed in laboratories for spectroscopy, interferometry, and other precision measurements.

Selecting the Right Window

When choosing a flat laser window, consider the following factors:

  • Wavelength Compatibility: Ensure the material and coatings are suitable for the laser's operating wavelength.

  • Surface Quality: High surface flatness and low scratch-dig specifications are crucial for minimizing beam distortion.

  • Thermal and Mechanical Properties: Select materials that can withstand the operating environment's temperature and mechanical stresses.

  • Damage Threshold: For high-power applications, choose windows with coatings that can endure the laser's intensity without degradation.

In conclusion, flat laser windows are vital for maintaining the performance and longevity of optical systems. By selecting the appropriate material and coatings, these windows ensure efficient and reliable operation across various applications.