Superpolished UV/IR Fused Silica Windows

Asin customs and manufactures high precision superpolished windows. Material ranges from fused silica, K9, Zerodur, Pyrex to Borofloat to infrared material like Si, ZnSe, MgF2. Size ranges from 8mm to 420mm. Inquire us for more detail.

Superpolished UV/IR Fused Silica Windows Product Overview

Superpolished UV/IR fused silica windows are also known as ultra-smooth fused silica windows or super-precision fused silica windows. They are high-precision optical components made from UV, IR, and high-purity fused silica that have undergone ultra-precision polishing, achieving a surface roughness of sub-nanometer levels. Asin Optics is a manufacturer of ultra-smooth UV and IR fused silica. We can produce ultra-smooth optical components on substrates ranging from 4 mm to 700 mm in diameter, with a surface roughness of Ra ≤ 100 nm, PV ≤ λ/30, and a surface finish of up to 5:1.

Superpolished UV/IR Fused Silica Windows Key Benefit

Superpolished UV/IR fused silica windows are engineered to meet demanding requirements for ultra-low scatter loss, minimal surface micro-defects, the ability to withstand higher laser power, and to maintain excellent beam quality by minimizing wavefront distortion.

Asin Optics provides professional superpolished fused silica window fabrication services with the following core advantages:

• We utilize advanced ultra-precision polishing processes, achieving surface roughness of Ra ≤ 100 nm, which maximizes suppression of diffuse reflection and scattering losses.
• We select high-purity UV-grade and IR-grade fused silica substrates imported from internationally recognized suppliers. These materials feature extremely low levels of internal bubbles and inclusions, ensuring outstanding transmission across a broad spectral range, especially for UV lasers and IR laser applications.
• Our transmitted wavefront error can be controlled to within λ/30, ensuring excellent beam pointing stability and preserving beam quality.
• In addition to using high-purity fused silica capable of withstanding high-power laser pulses, we also deposit high laser-damage-threshold anti-reflection (AR) coatings and high-reflection (HR) coatings on the surfaces. These windows are ideally suited for excimer lasers, solid-state lasers, and ultrafast laser systems.
  We implement strict quality control standards for surface finish. Surface quality can reach 5-1 scratch-dig, ensuring surfaces free from scratches, pits, and visible defects.
• We offer strong customization capabilities. In addition to standard circular and rectangular formats, we also provide custom fabrication such as wedged windows, ultra-thin substrates, drilled holes, and other special configurations based on customer requirements.

Superpolished UV/IR Fused Silica Windows Custom Capability

Why Choose Asin Optics For Your Low Scatter Optics

1. For our Ultra-smooth UV/IR Fused Silica Optical Windows, each window comes with complete process documentation and inspection reports, including surface topography interferograms and AFM roughness profiles, available for reference.
2. We utilize Class 100 cleanroom packaging. After undergoing rigorous ultrasonic cleaning and UV-ozone treatment, the windows are vacuum-sealed to prevent contamination from particles and organic matter, thereby maximizing their service life.
3. Our technical team can assist customers with coating optimization, providing rapid response and customization services.

Superpolished Fused Silica Windows Applications

UV Lithography and Semiconductor Inspection

In UV lithography and wafer defect inspection, even the faintest stray light can cause pattern distortion or false positives. Sub-nanometer ultra-smooth surfaces eliminate the substrate that causes scattered light, reduce background noise in dark-field inspection, and allow high-energy UV pulses to pass through with high transmittance.

High-Power Lasers

Windows with subsurface damage or impurities are prone to thermal lensing effects. Ultra-smooth windows reduce the frequency of damage to optical components, ensure reliable output of high-power lasers, and withstand high-energy flux density irradiation in transmission optical paths.

Measurement and Interferometry Systems

In interferometric measurements, any nanoscale irregularities on the window surface can cause phase errors. Ultra-smooth components can serve as reference plates or transmission standard windows for Fizeau and Tayman-Green interferometers, ensuring sharp and clear interference fringes and delivering reliable results.

FAQ

Q1: What types of fused silica materials do you currently support?

We currently support synthetic fused silica, such as Corning 7980 and Scott UV/IR fused silica. For specific applications, we will recommend the appropriate grade.

Q2: What are the maximum diameter and minimum thickness for ultra-smooth window plates?

We currently support ultra-smooth processing up to a maximum diameter of 700 mm. For thin window plates, we can achieve a thickness of 0.5 mm while maintaining excellent flatness (1/30 λ).

Q3: What equipment do you use to measure roughness at the angstrom level?

We primarily use atomic force microscopes (AFM) or high-resolution white-light interferometers (such as the Zygo NewView series). Each ultra-smooth product comes with a scan report.