MiXran Meg1057 Laser-Grade Plane Optical Window
| Brand | MiXran |
|---|---|
| Model | Meg1057 |
| Component Type | Precision Optical Window |
| Surface Quality | 20–10 Scratch-Dig |
| Surface Flatness | λ/10 @ 633 nm |
| Coating | Broadband Anti-Reflection (BBAR) |
| Reflectivity | <0.25% per surface @ 532 nm, 633 nm, 785 nm, and 1064 nm |
| Substrate Material | Fused Silica (UV-grade) |
| Clear Aperture | ≥90% of diameter |
| Dimensional Tolerance | ±0.1 mm (diameter), ±0.05 mm (thickness) |
| Parallelism | <3 arcsec |
| Wavefront Distortion | <λ/8 over clear aperture |
Overview
The MiXran Meg1057 is a high-precision plane optical window engineered for demanding laser and interferometric applications in research laboratories, industrial metrology systems, and photonics instrumentation. Constructed from UV-grade fused silica, the Meg1057 exhibits exceptional transmission from 185 nm to 2.1 µm, low thermal expansion (α ≈ 0.55 × 10⁻⁶ /°C), and superior resistance to thermal shock and UV-induced compaction. Its λ/10 surface flatness (measured at 633 nm) and 20–10 scratch-dig surface quality ensure minimal wavefront distortion and scatter—critical for beam collimation, cavity alignment, and high-finesse optical resonators. The broadband anti-reflection (BBAR) coating is ion-beam sputtered for high environmental stability, low absorption, and long-term performance under continuous-wave and pulsed laser irradiation up to 5 J/cm² (10 ns, 10 Hz, 1064 nm).
Key Features
- Optimized BBAR coating with <0.25% residual reflectance per surface across four key laser wavelengths: 532 nm (frequency-doubled Nd:YAG), 633 nm (HeNe), 785 nm (diode Raman excitation), and 1064 nm (Nd:YAG fundamental)
- Fused silica substrate certified to MIL-O-13830A and ISO 10110–7 standards for surface quality and homogeneity
- Controlled thickness tolerance (±0.05 mm) and parallelism (<3 arcsec) to minimize etalon effects in multi-pass configurations
- Clear aperture ≥90% of nominal diameter ensures compatibility with standard lens mounts and kinematic cells without vignetting
- Wavefront error <λ/8 over full clear aperture (verified via phase-shifting interferometry per ISO 10110–5)
- Available in 11 standardized diameters (Φ5.0 mm to Φ50.8 mm) and thicknesses scaled for mechanical rigidity and mounting compatibility
Sample Compatibility & Compliance
The Meg1057 is compatible with vacuum-compatible flanges (CF, KF), optomechanical cage systems (e.g., Thorlabs 30 mm and 60 mm), and custom vacuum viewports when integrated with appropriate O-ring grooves or metalized sealing surfaces. All units undergo 100% inspection per ISO 10110–2 (surface form), ISO 10110–3 (surface imperfections), and ISO 10110–7 (material stress birefringence). Coating durability complies with MIL-C-48497A for abrasion resistance and humidity exposure (95% RH, 40°C, 240 h). For regulated environments—including ISO 13485-certified medical device manufacturing and FDA-regulated analytical instrument OEM integration—the Meg1057 can be supplied with full traceability documentation (batch-specific spectral transmittance reports, interferometric test data, and material certificates).
Software & Data Management
While the Meg1057 is a passive optical component, MiXran provides downloadable spectral transmittance datasets (CSV and SDF formats) for each product variant, calibrated against NIST-traceable spectrophotometers (PerkinElmer Lambda 1050+ with integrating sphere). These datasets support optical design validation in Zemax OpticStudio, CODE V, and FRED. Customers integrating Meg1057 windows into automated assembly lines may request machine-readable QC reports compliant with SEMI E142 (data content standard for semiconductor equipment components) or ASTM E2659 (certification of conformance). All calibration records are archived for 10 years and available upon request for GLP/GMP audit readiness.
Applications
- Laser cavity end windows and Brewster-angle mounts for Ti:sapphire, fiber, and diode-pumped solid-state lasers
- Beam delivery optics in confocal microscopy, OCT, and LIBS systems requiring minimal group delay dispersion
- Reference surfaces in displacement interferometry (e.g., HP/Keysight 5530 systems) and gravitational wave detector prototypes
- UV-VIS-NIR spectroscopy flow cells and cuvette windows where low autofluorescence and high transmission uniformity are required
- Space-qualified optical benches (per ECSS-Q-ST-70-02C) when selected with optional radiation-hardened coating variants
FAQ
Is the Meg1057 suitable for ultrafast laser applications (e.g., femtosecond pulses)?
Yes—fused silica substrate and ion-beam-sputtered BBAR coatings exhibit negligible group delay dispersion (GDD) below ±5 fs² over 100 nm bandwidths near 800 nm; GDD data sheets are available upon request.
Can I specify custom diameters or thicknesses beyond the standard catalog?
Yes—MiXran offers custom fabrication with lead times of 4–6 weeks; minimum order quantity applies for non-standard dimensions.
Do you provide mounting hardware or kinematic adapters for the Meg1057?
Standard SM-threaded retaining rings (e.g., SM05RR, SM1RR) and vacuum-compatible window mounts are available as accessory SKUs; CAD models (STEP, IGES) are provided free of charge.
What is the maximum CW power density the Meg1057 can withstand at 1064 nm?
For clean, collimated beams incident normal to the surface, the damage threshold exceeds 10 MW/cm² (tested per ISO 21254–1 with 10.6 µm CO₂ reference); actual limit depends on beam profile, cleanliness, and cooling configuration.
Are RoHS and REACH declarations available for export compliance?
Yes—full substance declarations and third-party lab test reports (SGS, Intertek) are included with every shipment for EU, UK, and APAC markets.
