MiXran Meg1069 Sapphire High-Precision Flat Optical Window

Overview

The MiXran Meg1069 Sapphire High-Precision Flat Optical Window is a monolithic optical component engineered for demanding vacuum, high-pressure, and extreme-temperature environments where conventional fused silica or BK7 windows fail. Fabricated from optically grade, C-axis oriented single-crystal sapphire (Al₂O₃), the Meg1069 delivers exceptional mechanical robustness, chemical inertness, and broad spectral transmission—from deep ultraviolet (250 nm) through visible to mid-infrared (up to 5.5 µm). Its λ/10 surface flatness (measured at 633 nm HeNe wavelength) and 10-5 scratch-dig surface quality ensure minimal wavefront distortion in interferometric, laser cavity, and metrology-grade applications. Unlike polycrystalline ceramics or synthetic spinel, sapphire’s crystalline homogeneity eliminates birefringent artifacts and scattering centers, making the Meg1069 suitable for polarization-sensitive systems and high-energy pulsed laser delivery.

Key Features

• Single-crystal sapphire substrate with certified crystallographic orientation (C-plane normal to optical surface)
• λ/10 surface flatness (peak-to-valley) and <10 arcsec parallelism across full aperture
• Surface quality compliant with ISO 10110-7:2017 (10-5 scratch-dig) verified via automated dark-field inspection
• Thermal stability up to +1000 °C continuous; compatible with ultra-high vacuum (UHV) bake-out cycles (≤250 °C)
• Optional dielectric anti-reflection coatings: UV-AR (250–450 nm), VIS-AR (400–700 nm), NIR-AR (700–1100 nm), or broadband AR (250–2000 nm) with <0.25% residual reflectance per surface
• Custom thickness control (±0.02 mm tolerance) and edge geometry (e.g., beveled, laser-trimmed, or polished chamfer)

Sample Compatibility & Compliance

The Meg1069 window is routinely integrated into optical systems requiring long-term reliability under harsh conditions—including semiconductor process chambers, synchrotron beamlines, aerospace sensor housings, and high-power laser diagnostics. It complies with ISO 10110-1:2017 (optical element specification), MIL-O-13830B (surface quality), and ASTM F2692 (sapphire material standards). All units undergo 100% interferometric verification using Zygo Verifire™ Asphere interferometers and are traceable to NIST-calibrated reference flats. Batch certification includes spectral transmittance curves (200–6000 nm), surface roughness (Ra < 0.3 nm measured by AFM), and crystallographic orientation reports (XRD rocking curve FWHM ≤ 15 arcsec).

Software & Data Management

While the Meg1069 is a passive optical component, its performance documentation is fully digitized and structured for integration into laboratory asset management systems. Each shipped unit carries a unique serial number linked to a secure PDF certificate containing interferogram data, coating spectral curves, and dimensional metrology reports. Raw interferometric datasets (Zygo .zdc format) and spectral transmittance files (.csv) are available upon request for internal QA validation or GLP/GMP audit trails. The digital certificate supports metadata tagging (e.g., application context, installation date, maintenance history) and conforms to ISO/IEC 17025:2017 requirements for calibration records.

Applications

• Laser cavity end windows for Nd:YAG, Ti:sapphire, and excimer lasers (resistant to 10 J/cm² @ 248 nm, 20 ns pulse)
• Viewport windows in UHV deposition systems (base pressure <1×10⁻⁹ mbar) and plasma etch reactors
• Protective windows for FTIR spectrometers, Raman probes, and hyperspectral imaging sensors
• Optical access ports in high-temperature furnaces and combustion diagnostics rigs
• Reference-grade windows in metrology labs for flatness calibration transfer standards
• Defense-grade EO/IR sensor domes and missile seeker windows (subject to ITAR-controlled variants)

FAQ

Is the Meg1069 window suitable for use with femtosecond laser pulses?
Yes—its low two-photon absorption coefficient (<1×10⁻¹⁰ cm/W) and high damage threshold (≥500 mJ/cm² @ 800 nm, 100 fs) make it appropriate for ultrafast laser applications when properly AR-coated.
Can custom diameters or thicknesses outside the standard range be supplied?
Yes—MiXran offers engineering support for non-standard geometries, including elliptical apertures, stepped thickness profiles, and metallized edge seals for hermetic bonding.
What is the typical lead time for coated versus uncoated windows?
Uncoated windows ship within 5 business days of order confirmation; AR-coated variants require 12–15 business days due to vacuum deposition scheduling and post-coating metrology.
Do you provide mounting fixtures or kinematic mounts compatible with the Meg1069 series?
Standard SM1- and SM2-threaded retaining rings and kinematic cage plates (30 mm and 60 mm systems) are available as optional accessories with matched thermal expansion coefficients.
Are RoHS and REACH compliance documents available?
Yes—all sapphire substrates and coating materials are certified RoHS 2015/863/EU and REACH SVHC-free; full declarations are included in the shipping dossier.