MiXran Meg1084 High-Precision Fused Silica Flat Mirror
| Brand | MiXran |
|---|---|
| Model | Meg1084 |
| Substrate Material | Fused Silica |
| Surface Flatness | λ/20 @ 633 nm (typ.) |
| Surface Quality | 10-5 Scratch-Dig |
| Clear Aperture | ≥90% of diameter/side |
| Coating Options | Protected Aluminum (AL), UV-Enhanced Aluminum (UVAL), Protected Silver (AG), Protected Gold (AU), Dielectric HR (D01–D04) |
| Diameter/Side Length Range | Φ5.0–Φ50.0 mm or 12.5×12.5–50.0×50.0 mm |
| Thickness | 2–10 mm (size-dependent) |
| Damage Threshold | >500 MW/cm² (10 ns, 1064 nm, pulsed) |
Overview
The MiXran Meg1084 is a high-precision flat mirror engineered for demanding optical alignment, interferometry, laser cavity construction, and beam steering applications in research laboratories and industrial photonics systems. Fabricated from synthetic fused silica (SiO₂), this mirror offers exceptional thermal stability (CTE ≈ 0.55 × 10⁻⁶ /°C), ultra-low coefficient of thermal expansion, and outstanding transmission from deep ultraviolet (185 nm) to near-infrared (2.1 µm). Its λ/20 surface flatness (measured at 633 nm HeNe wavelength) and 10-5 scratch-dig surface quality ensure minimal wavefront distortion and high-fidelity beam reflection—critical for applications requiring sub-microradian angular stability and diffraction-limited performance. Unlike borosilicate or BK7 substrates, fused silica minimizes thermal lensing under high-power irradiation and exhibits negligible fluorescence under UV excitation, making the Meg1084 suitable for ultrafast laser systems, UV lithography test benches, and space-qualified optical assemblies.
Key Features
- Fused silica substrate with certified homogeneity (Δn < 5 × 10⁻⁶) and bubble/inclusion grade ≤ ISO 10110-3 Class A
- Surface flatness tolerance: λ/20 PV (peak-to-valley) at 633 nm, verified via phase-shifting interferometry (PSI) per ISO 10110-5
- Surface roughness: < 0.3 nm RMS (measured by atomic force microscopy), enabling low-scatter operation in high-sensitivity detection paths
- Multiple dielectric and metallic coating options optimized for spectral range and environmental durability
- Edge clearance: 0.3 mm bevel (standard), optional 0.1 mm fine bevel for tight-mounting configurations
- Compliant with RoHS 2015/863/EU and REACH SVHC screening; no lead, cadmium, or hexavalent chromium in substrate or coatings
Sample Compatibility & Compliance
The Meg1084 supports integration into vacuum-compatible (10⁻⁶ mbar), cleanroom-class (ISO Class 5), and temperature-controlled optical tables. All metallic coatings (AL, UVAL, AG, AU) include a SiO₂ overcoat for oxidation resistance and humidity stability. Dielectric high-reflection (HR) coatings (D01–D04) are designed per ISO 13697 for reflectance uniformity (>99.5% average R across specified band) and polarization insensitivity (s/p deviation < 0.2%). Each mirror is supplied with individual metrology report including interferogram, surface power error map, and coating spectral reflectance curve (200–2000 nm, ±0.5 nm resolution). The product conforms to ISO 9001:2015 manufacturing controls and is traceable to NIST-traceable reference standards for thickness and reflectance calibration.
Software & Data Management
While the Meg1084 is a passive optical component, its specifications are fully integrated into standard optical design environments including Zemax OpticStudio (ZOS), CODE V, and FRED. Manufacturer-provided coating spectral data files (.dat, .txt) are compatible with ThinFilm Coating Design modules and support multi-layer stack modeling, angle-of-incidence analysis, and polarization-dependent loss (PDL) simulation. Each unit’s serial-numbered metrology certificate is archived in a secure cloud repository accessible via customer portal, supporting audit-ready documentation for GLP, GMP, and ISO/IEC 17025-compliant laboratories. Batch-level certification includes statistical process control (SPC) charts for flatness and reflectance consistency across production lots.
Applications
- Laser resonator end mirrors and folding optics for CW and pulsed Nd:YAG, Ti:Sapphire, and fiber lasers
- Reference surfaces in Michelson, Mach-Zehnder, and Twyman-Green interferometers
- UV-VIS-NIR spectrophotometer beam combiners and fold mirrors
- Beam delivery optics in semiconductor inspection tools and mask aligners
- Front-surface mirrors in astronomical instrumentation where low thermal drift is mandatory
- Optical cavities for cavity ring-down spectroscopy (CRDS) and frequency stabilization
FAQ
What is the typical damage threshold for the UVAL-coated Meg1084 under nanosecond pulsed 355 nm irradiation?
For 10 ns pulses at 355 nm, the UVAL coating exhibits a fluence threshold of ≥ 5 J/cm² (tested per ISO 21254-2), with no measurable degradation after 10⁴ shots at 80% of threshold.
Can the Meg1084 be custom-mounted in kinematic cells or housed in vacuum-compatible mounts?
Yes—MiXran provides mechanical drawings (STEP, PDF) and interface specifications for third-party mount integration; custom anodized aluminum or Invar mounts are available upon request.
Is coating adhesion tested per MIL-C-48497A or ISO 2409?
All coatings undergo cross-hatch adhesion testing per ISO 2409 (Grade 0) and tape test per ASTM D3359 Method B, with no delamination observed.
Do you supply spectral reflectance data for oblique angles (e.g., 45° AOI)?
Yes—full-angle spectral data (0°–45° in 5° increments) is included in the digital metrology package for all dielectric HR variants.
Are batch certificates available for regulatory submissions (e.g., FDA 510(k), CE technical file)?
Yes—batch-specific conformity statements, material declarations, and coating process validation summaries are provided for inclusion in regulatory dossiers.
