MiXran Meg1087 Standard-Precision Plane Mirror

Overview

The MiXran Meg1087 Standard-Precision Plane Mirror is a fundamental optical component engineered for stable beam steering, alignment reference, and interferometric stability in laboratory and industrial optical systems. Fabricated from high-homogeneity optical float glass with a surface flatness of λ/4 at 632.8 nm (HeNe wavelength) and surface quality rated to 60-40 scratch-dig per MIL-PRF-13830B, the Meg1087 delivers consistent wavefront fidelity under moderate environmental conditions. Its design adheres to established metrological practices for planar optics—ensuring minimal distortion during collimated or near-collimated light reflection. Unlike high-end λ/10 or λ/20 mirrors intended for ultra-stable cavity applications, the Meg1087 is optimized for cost-sensitive yet technically rigorous environments including undergraduate optics labs, OEM integration into spectrometers and laser diode modules, and alignment fixtures in QC metrology stations.

Key Features

• Standard precision specification: λ/4 surface flatness (peak-to-valley) measured at 632.8 nm, verified via phase-shifting interferometry per ISO 10110-5
• Multiple substrate geometries: round apertures from Φ5.0 mm to Φ50.0 mm and square formats (12.5×12.5 mm to 50.0×50.0 mm), all with uniform 2 mm thickness unless specified (3 mm for Φ30 mm; 4 mm for Φ38 mm and larger)
• Four certified dielectric-enhanced metallic coatings: Protected Aluminum (AL), UV-Enhanced Aluminum (UVAL), Protected Silver (AG), and Protected Gold (AU), each deposited via electron-beam evaporation under high-vacuum conditions (≤5×10⁻⁶ Torr)
• Clear aperture guaranteed ≥90% of nominal dimension, enabling reliable edge clearance in kinematic mounts and lens tubes
• RoHS-compliant coating architectures with adhesion-promoting chromium or nickel-chromium interlayers and SiO₂ overcoats for environmental durability
• Traceable calibration documentation available upon request, including spectral reflectance curves (250–20,000 nm) and interferometric test reports

Sample Compatibility & Compliance

The Meg1087 is compatible with standard kinematic mirror mounts (e.g., Thorlabs KM100, Newport U-100 series), cage systems (60 mm and 30 mm), and custom optomechanical interfaces. Its 2 mm substrate thickness ensures compatibility with low-profile retaining rings and flexure-based tip/tilt adjusters. All coatings meet ISO 9211-4 requirements for durability (rub test, tape adhesion, humidity cycling). The UVAL variant complies with ASTM E430 for UV reflectance characterization; AG and AU variants conform to ISO 11551 for high-reflectivity metallic mirror specifications. No hazardous substances are used in substrate fabrication or coating processes—full RoHS 2011/65/EU and REACH SVHC declarations are provided with bulk orders.

Software & Data Management

While the Meg1087 is a passive optical component, MiXran provides downloadable spectral reflectance datasets (CSV and MATLAB .mat formats) for all coating variants, traceable to NIST-traceable spectrophotometers (PerkinElmer Lambda 1050+, Agilent Cary 7000). These datasets support optical modeling in Zemax OpticStudio, CODE V, and FRED. For customers integrating Meg1087 mirrors into regulated environments (e.g., medical laser systems or aerospace test benches), full material certifications—including substrate lot traceability, coating deposition log files, and environmental stress test summaries—are available under NDA and comply with ISO 13485 and AS9100 documentation standards. Audit-ready records support FDA 21 CFR Part 11–aligned electronic record retention where required.

Applications

• Laser cavity end mirrors and folding optics in CW diode-pumped solid-state (DPSS) lasers (e.g., Nd:YAG, Yb:fiber at 1064 nm)
• Beam combiners and pick-off mirrors in FTIR spectrometers and OCT source assemblies
• Alignment references in coordinate measuring machines (CMMs) and laser tracker calibration setups
• UV-VIS-NIR reflectance standards for spectrophotometer validation (UVAL variant)
• Mid-IR beam delivery in CO₂ laser machining systems and gas sensing platforms (AU and AG variants)
• Undergraduate and graduate teaching kits for polarization, interference, and ray optics experiments

FAQ

What is the maximum incident angle for optimal reflectance performance?
For all Meg1087 coatings, performance is specified at 0° (normal incidence). Reflectance remains within ±2% of nominal values up to 15° for AL/UVAL and up to 10° for AG/AU due to polarization-dependent losses.
Can the Meg1087 be cleaned using standard optical protocols?
Yes—use spectroscopic-grade acetone followed by methanol, applied with lint-free wipes (e.g., Texwipe TX609) using the drag technique. Avoid ultrasonic cleaning for coated variants; uncoated substrates may be sonicated in deionized water only.
Is custom coating or substrate specification available?
Yes—custom thicknesses (up to 10 mm), alternate substrates (e.g., fused silica for UV-C or BK7 for visible broadband), and narrowband enhanced coatings (e.g., HR @ 532 nm) are available under OEM agreements with minimum order quantities.
How is surface flatness verified and certified?
Each production lot undergoes full-aperture interferometric testing on a Zygo GPI XP interferometer. A representative sample per batch receives full PV and RMS flatness reporting; certificates list test wavelength, reference sphere, and environmental conditions (temperature, humidity, air pressure).
Do you provide mounting hardware or kinematic solutions?
MiXran offers optional SM-threaded mounts (e.g., SM1RR for Φ25 mm) and kinematic baseplates (KMB12) compatible with Meg1087 dimensions. Custom mounting adapters can be supplied under mechanical drawing release.