Meg1102 Plane Ruled Diffraction Grating
| Brand | MiXran |
|---|---|
| Origin | Beijing, China |
| Model | Meg1102 |
| Component Category | Optical Element |
| Dimensions (various) | 12.5×25×9.5 mm to 50×50×9.5 mm |
| Groove Density | 75–1200 l/mm |
| Blaze Wavelength | 250 nm – 10.6 µm |
| Blaze Angle | 0.00° – 36.87° |
| Role Dispersion | 0.35 – 3.33 nm/mrad |
| Product Series | GGR01-XXXX-XXXX |
Overview
The MiXran Meg1102 is a high-precision plane ruled diffraction grating engineered for demanding spectroscopic applications across ultraviolet (UV), visible (VIS), near-infrared (NIR), and mid-infrared (MIR) spectral regions. Fabricated using mechanical ruling techniques on optically polished substrates—typically fused silica, BK7 glass, or electroplated copper—the Meg1102 features diamond-scribed grooves with strict control over groove parallelism, spacing uniformity, and blaze geometry. Unlike holographic gratings, ruled gratings offer superior efficiency in designated blaze orders due to optimized groove profile geometry, making them preferred for high-throughput monochromators, spectrometers, laser pulse compressors, and wavelength calibration standards. Each Meg1102 grating undergoes rigorous metrological verification including groove density tolerance (±0.5 l/mm), surface flatness (λ/10 @ 633 nm), and coating integrity (aluminum or enhanced Al+MgF₂ for UV stability). The grating’s performance is governed by the classical grating equation: mλ = d(sinα + sinβ), where m is the diffraction order, λ the wavelength, d the groove spacing, and α, β the incident and diffracted angles.
Key Features
- Manufactured via precision mechanical ruling on ultra-flat substrates (RMS surface roughness < 5 Å)
- Available in 14 standard groove densities: 75, 100, 150, 300, 450, 600, 1200 l/mm — enabling tailored resolution and dispersion characteristics
- Blaze wavelengths spanning 250 nm (UV) to 10.6 µm (CO₂ laser line), supporting broadband instrumentation design
- Multiple substrate options: UV-grade fused silica (for <250 nm transmission), BK7 (VIS-NIR), and copper (for IR applications requiring thermal stability)
- Standard aluminum coating (protected with SiO₂ or MgF₂) with typical peak reflectance >85% in the blaze region; custom coatings (e.g., gold for IR, enhanced silver for VIS) available upon request
- Geometric tolerances compliant with ISO 10110-7: surface figure λ/10, thickness tolerance ±0.1 mm, edge perpendicularity ±1 arcmin
Sample Compatibility & Compliance
The Meg1102 series is compatible with standard optical mounts (kinematic, post-mounted, or vacuum-compatible holders) and integrates seamlessly into Czerny–Turner, Ebert–Fastie, and Littrow-configured spectrometers. All gratings are supplied with individual calibration certificates traceable to NIM (National Institute of Metrology, China) for groove density and blaze angle. While not certified to ISO/IEC 17025 for routine calibration services, dimensional and optical data meet requirements for GLP-compliant laboratory use in academic research, industrial QA/QC, and OEM spectrograph integration. Substrates conform to ASTM F273 for optical glass homogeneity and MIL-PRF-174B for coated surface durability. For regulated environments (e.g., pharmaceutical UV-Vis validation), users may implement in-house qualification protocols aligned with USP and ICH Q2(R2) guidelines.
Software & Data Management
No proprietary software is bundled with the Meg1102, as it functions as a passive optical component. However, its performance parameters are fully interoperable with industry-standard optical design and simulation platforms including Zemax OpticStudio, CODE V, and ASAP. Grating dispersion curves, efficiency maps (TE/TM polarization), and Littrow alignment tables are provided in CSV and ASCII format upon request. For traceability and inventory control, each unit ships with a unique GGR01-series part number (e.g., GGR01-2525-6030) encoded in both human-readable label and optional 2D DataMatrix barcode (ISO/IEC 15415 compliant). Audit-ready documentation supports FDA 21 CFR Part 11–aligned electronic record systems when integrated into validated instrument workflows.
Applications
- High-resolution monochromators for synchrotron beamlines and plasma diagnostics
- Wavelength selection optics in tunable Ti:sapphire and OPO laser systems
- Calibration references for CCD- and CMOS-based array spectrometers (e.g., Ocean Insight, Avantes)
- Input/output couplers in Fourier-transform infrared (FTIR) interferometers
- Beam combiners/splitters in multi-laser fluorescence microscopy setups
- OEM integration into portable Raman analyzers and handheld NIR spectrometers
FAQ
What substrate material is recommended for UV applications below 200 nm?
Fused silica with MgF₂ overcoat is standard; calcium fluoride (CaF₂) substrates are available for deep-UV (<190 nm) use upon special order.
Can the Meg1102 be used in vacuum or UHV environments?
Yes — copper-substrate variants with non-outgassing Al+SiO₂ coatings meet ASTM E595 total mass loss (TML) <1.0% and collected volatile condensable materials (CVCM) <0.10%, suitable for UHV spectrometer chambers.
Is polarization-dependent efficiency data available?
Yes — measured TE/TM efficiency curves across the specified blaze range are included in the technical datasheet for each product variant.
What is the maximum incident beam diameter supported without vignetting?
For 25×25 mm gratings, full aperture utilization is guaranteed for collimated beams ≤20 mm diameter; larger beams require custom mounting kinematics to avoid substrate edge diffraction artifacts.
Do you provide wavefront error measurements for individual units?
Interferometric wavefront maps (Zygo GPI or similar) are available as an optional add-on service at time of order, with reports conforming to ISO 10110-5.
