Web Menu

Product Search

Language

Share

Custom Quartz Windows

Custom Quartz Windows

-- Steady & Reliable Manufacturer --

Introduction

Custom Quartz Windows are precision-machined optical components designed to provide viewing access, beam guidance, or protective sealing in systems where standard glass or polymer materials would fail due to thermal, chemical, or UV exposure. Yancheng Mingyang Quartz Products Co., Ltd. specializes in fabricating windows from high-purity fused silica (both natural and synthetic), ensuring superior transparency across the UV (as low as 185 nm) to IR spectrum. The term 'custom' implies not only unique dimensions (rectangular, circular, annular) but also specialized surface quality requirements, including low scratch/dig ratings, tight flatness tolerances, and specific edge treatments (bevels, chamfers). Our windows are critical in environments such as high-power laser systems, vacuum chambers, high-temperature furnaces, and analytical instruments where optical transmission must be reliable and distortion-free.

We understand that for custom quartz windows, dimensional tolerance and surface finish are often more critical than for mass-produced glass. We achieve extremely tight parallelism and flatness specifications (often lambda/10 or better) through multi-stage lapping and super-polishing processes using dedicated CNC optical equipment. Furthermore, we offer thin-film coating services, including Anti-Reflective (AR) coatings optimized for specific wavelengths (e.g., 193 nm or 1064 nm) and specialized dichroic or reflective coatings to meet complex optical system requirements. Our windows are frequently chosen over alternatives like sapphire or CaF2​ when broad spectral range, low cost, large size capability, and low CTE are the primary drivers. For applications like plasma etching chambers, we select a material grade and coating that resists chemical attack while maintaining high optical throughput, ensuring a long operational lifetime and consistent performance.

Our commitment to customization includes not only the window geometry but also the material grade selection (e.g., low OH for IR applications, high OH for UV) and the final cleanroom packaging. We work closely with our clients’ optical and mechanical engineering teams to deliver windows that perfectly meet the functional and integration challenges of high-performance scientific and industrial systems globally.

Specification Parameters

ParameterDetails
Material GradeOptical Grade Fused Silica (Type I, II, or Synthetic Type III)
Dimensional RangeFrom 5 mm diameter to 500×500 mm square
Thickness Range0.5 mm to 50 mm (Custom engineered for pressure/thermal load)
Surface FlatnessStandard λ/4 per inch; Precision λ/10 across the aperture
Scratch-Dig RatioStandard 60/40; Optical Grade 20/10 (per MIL-PRF-13830B)
ParallelismAs tight as <5 arc seconds
Available CoatingsAnti-Reflective (AR), High-Reflective (HR), Dichroic, Hydrophobic
Edge FinishGround, Chamfered, or Fire Polished (for sealing applications)

The detailed specifications underline the precision manufacturing required for custom quartz windows. The Surface Flatness and Scratch-Dig Ratio are the key determinants of optical performance. A λ/10 flatness is essential for wavefront preservation in high-coherence laser systems, minimizing beam distortion. The Scratch-Dig ratio (e.g., 20/10) specifies the maximum permissible surface defects; lower numbers indicate higher quality, which is critical for preventing laser-induced damage. Our ability to consistently achieve tight Parallelism (<5 arc seconds) ensures minimal beam deviation, vital in multi-component optical trains. We use sophisticated Zygo interferometers and high-resolution microscopes to certify these optical parameters. The choice between material types depends on the intended wavelength; Synthetic Fused Silica (Type III) is selected for DUV applications (below 200 nm) due to its minimal trace element fluorescence and high transmission. We offer the application of highly durable thin-film coatings, which are deposited in a clean, PVD (Physical Vapor Deposition) environment. These coatings are essential for maximizing transmission and power handling in laser applications. We also manufacture windows with non-standard edge geometries, such as tapered edges or stepped flanges, for specialized mounting in vacuum or pressure systems, always ensuring the edge finish is clean and defect-free to prevent thermal stress points.

Applications

  • High-Power Laser Optics: Serving as the output window or beam steering element in industrial CO2​, Nd:YAG, and Excimer lasers, benefiting from high purity and low absorption.

  • Vacuum and Pressure Chambers: Acting as viewing ports for monitoring internal processes in CVD, PVD, and material analysis chambers, resisting high differential pressure while maintaining optical clarity.

  • Analytical Spectroscopy: Used as cell windows and light entries in UV/Vis spectrophotometers, fluorimeters, and high-purity HPLC detectors, leveraging broad spectral transmission and non-fluorescence.

  • Space and Aerospace Imaging: Used as protective covers for optical sensors and cameras in aerospace environments, benefiting from radiation resistance and high thermal stability.

  • Semiconductor Lithography and Etching: Acting as the final protective window in plasma etching chambers, where the window must withstand aggressive chemical species and high temperatures.

  • High-Temperature Furnaces: Providing sealed viewing windows that can tolerate extreme thermal gradients for real-time monitoring of internal heating processes.

The versatility of custom quartz windows makes them invaluable across technology sectors. In laser applications, the low absorption of quartz prevents the window from heating up, which is crucial for maintaining the laser beam’s stability and preventing thermal lensing. In vacuum and high-pressure systems, the high mechanical strength of the polished quartz allows for thin, high-clarity windows to be safely used where thick, lower-grade glass would be required, improving system design. Our capability extends to fabricating complex shapes such as wedged windows to eliminate etalon effects or windows with precision-drilled holes for feedthroughs. The choice of the precise custom geometry is typically driven by the client's mechanical mounting design and the operational environment (e.g., temperature, pressure, UV dosage), factors we are expert in advising on to ensure optimal performance and integration.

Advantages

  • Broadband Optical Transparency: Exceptional transmission from the deep ultraviolet (∼185 nm) through the infrared (∼2500 nm), supporting multiple optical functions with a single material.

  • Extreme Dimensional Accuracy: Our λ/10 flatness and tight parallelism control ensure minimal wavefront distortion, making them ideal for high-precision imaging and laser beam conditioning.

  • High Laser Damage Threshold: Superior purity and smooth surface finishing significantly increase the window's resistance to damage from high-power laser irradiation, enhancing reliability and lifespan.

  • Ultra-Low Thermal Expansion: Quartz maintains stable dimensions under rapid temperature shifts, preventing stress-induced birefringence or mechanical failure in thermally dynamic environments.

  • Chemical and Plasma Resistance: Ideal for harsh processing environments, the windows resist etching and degradation from reactive gases and high-energy plasma commonly found in semiconductor equipment.

  • Full Customization and Coating Service: We provide windows in any shape, size, and thickness, coupled with performance-enhancing AR or reflective coatings tailored precisely to the client's operating wavelength.

The value of a custom quartz window lies in its ability to be an invisible, high-performance barrier. We ensure that our windows are the weakest point in terms of function, but the strongest in terms of durability. By fabricating the windows in-house, we control the entire quality chain, from material annealing to final optical polishing and coating deposition. This vertical integration guarantees consistency and allows us to offer shorter lead times and higher quality than standard distributors. Our rigorous QA process includes AFM (Atomic Force Microscopy) checks on the surface roughness for the highest optical grades, ensuring minimal scattering losses, a critical detail for advanced optical systems.

Payment and Shipping

We accept standard international payments including T/T (wire transfer) and L/C. For custom-engineered optical components, a detailed quotation is provided, with a production deposit required upon sign-off of the final mechanical and optical drawings.

Shipping Protocol for Precision Optics: Our packaging is engineered to protect the highly polished and sensitive surfaces.

  • Cleanroom Preparation: Windows are cleaned to optical grade specifications and packaged in an ISO Class 5 environment, typically sealed in anti-static, particulate-free film or plastic boxes.

  • Non-Abrasive Suspension: Windows are secured in custom-machined plastic or foam holders that contact only the edges, protecting the optical surfaces from direct pressure or abrasion.

  • Transportation: We utilize express air freight (DHL Express or FedEx Priority) for global delivery to minimize handling and exposure. Every shipment includes full insurance and export compliance documentation.

Lead times vary by complexity: standard custom shapes are 15−20 working days, while λ/10 super-polished or coated windows may require 4−6 weeks. Clear communication on packaging and handling instructions is provided to ensure safe receiving.

Frequently Asked Questions (FAQ)

  • Q: Can you apply Anti-Reflective (AR) coatings tailored for multiple wavelengths on the same window?

  • A: Yes, we specialize in broadband AR coatings or dual-band coatings (e.g., optimized for both the visible and a specific infrared laser line), using PVD techniques to achieve high transmission and durability across the required spectral range.

  • Q: What is the recommended cleaning procedure for your high-purity quartz windows?

  • A: We recommend using high-purity isopropyl alcohol or acetone followed by lens tissue or specialized cleanroom wipes. For non-coated windows, an ultrasonic bath in a mild, high-purity detergent followed by DI water rinsing is also acceptable. Harsh acids should be avoided unless specified for a particular surface treatment.

  • Q: Do you offer windows made from UV-grade Synthetic Fused Silica?

  • A: Absolutely. Synthetic Fused Silica is our preferred material for applications requiring excellent transmission at DUV wavelengths (below 220 nm) due to its near-zero hydroxyl content, which minimizes absorption and solarization damage.

  • Q: Can the window be fused directly into a quartz tube or component?

  • A: Yes, using our advanced quartz fusion welding capability, we can permanently seal a precision window into a quartz tube or custom apparatus, creating a vacuum-tight, single-material assembly, eliminating gaskets and ensuring maximum purity.

From Made-in-China to
Global Smart Manufacturing

Yancheng Mingyang Quartz Products Co., Ltd. is a company specializing in the production of quartz and special glass products. Yancheng Mingyang Quartz Products Co., Ltd. is the production plant of Jinzhou Mingde Quartz Glass Co., Ltd. in Jiangsu, Since its establishment, the company has developed rapidly, introduced advanced technology and production equipment at home and abroad, and continuously improved and improved product quality. Relying on its own advantages, we have developed a variety of products suitable for the market and meet the needs of different customers, and solved many urgent production problems for our customers.

The company's products include quartz glass tubes, double-hole quartz glass tubes, quartz glass rods, quartz sheets, sapphire windows, calcium fluoride glass windows, infrared ultraviolet coatings, high-pressure resistant aluminosilicate glass window panels, quartz glass instruments, high borosilicate glass instruments, quartz crucibles, quartz gold-plated tubes, quartz heaters, quartz infrared heating tubes, far-infrared directional radiation heaters ultraviolet germicidal lamps and other special types of quartz glass products.

Yancheng Mingyang Quartz Products Co., Ltd.
Message Feedback
Custom Quartz Rod Components Custom Quartzware Fabrication Quartz Windows Quartz Substrates and Plates