MiXran Meg1132 Narrowband Interference Filter (FWHM = 10 nm)

Overview

The MiXran Meg1132 is a precision-engineered narrowband interference filter designed for high-fidelity spectral isolation in demanding optical instrumentation and photonics applications. Based on multi-layer dielectric thin-film coating technology deposited via ion-assisted electron-beam evaporation, the Meg1132 achieves a tightly controlled full width at half maximum (FWHM) of 10 nm across an exceptionally broad spectral range—from ultraviolet (340 nm) through visible and near-infrared (up to 1550 nm). Its performance is grounded in rigorous thin-film design principles, including quarter-wave stack optimization and advanced edge steepness control, enabling sharp cut-on/cut-off transitions and deep out-of-band rejection (>OD4–OD6 typical beyond ±50 nm from CWL). Unlike absorptive or colored-glass filters, the Meg1132 operates via constructive and destructive interference—offering wavelength stability under varying incident angles (±3° AOI recommended), minimal thermal drift, and compatibility with high-intensity laser sources when specified with low-absorption substrates.

Key Features

• Consistent 10 nm FWHM tolerance: ±0.5 nm across all standard center wavelengths (CWLs), verified by calibrated spectrophotometric measurement per ISO 9022-3.
• High peak transmission: Standard variants deliver T_max ≥45% (e.g., 420–650 nm), with high-transmission (H-series) options achieving ≥70–75% at select CWLs (e.g., 532 nm, 632.8 nm, 780 nm, 808 nm, 1064 nm, 1550 nm).
• Deep blocking performance: Out-of-band optical density (OD) exceeds OD4 between 200–300 nm and 1600–2000 nm; OD5–OD6 achievable in custom configurations.
• Dual-diameter standardization: Available in 12.7 mm (½″) and 25.4 mm (1″) clear apertures, both with precision-ground edges and laser-verified surface flatness (λ/4 @ 633 nm).
• Robust environmental stability: Coatings are humidity-resistant (per MIL-C-48497A), thermally stable up to +80 °C, and qualified for operation in Class 1000 cleanroom environments.
• Traceable metrology: Each filter batch undergoes spectral validation using a NIST-traceable UV-VIS-NIR spectrophotometer (PerkinElmer Lambda 1050+), with full spectral scan data provided upon request.

Sample Compatibility & Compliance

The Meg1132 is optimized for integration into OEM analytical platforms—including fluorescence microscopes, Raman spectrometers, flow cytometers, laser-induced breakdown spectroscopy (LIBS) systems, and quantum optics setups. Its unmounted, plano-plano geometry supports direct integration into SM-threaded lens tubes (e.g., Thorlabs SM1A6, SM2A6), kinematic mirror mounts, and custom optomechanical housings. All standard variants comply with RoHS 2015/863/EU and REACH SVHC regulations. For regulated life science or IVD instrumentation, the filter substrate and coating process adhere to ISO 10993-5 biocompatibility screening protocols (non-cytotoxicity verified), and documentation supports FDA 21 CFR Part 820 design history file (DHF) requirements. Optional certification packages include ISO/IEC 17025-accredited spectral test reports and material declarations per IPC-1752A.

Software & Data Management

While the Meg1132 is a passive optical component, its performance data is fully interoperable with industry-standard optical design and system modeling tools. Spectral transmittance datasets (.csv and .dat formats) are provided for each CWL variant and are natively importable into Zemax OpticStudio, CODE V, FRED, and LightTools. Custom spectral curves—including angle-dependent transmission (0°–10° incidence), polarization sensitivity (s/p ratio <1.05), and temperature-induced wavelength shift (ΔCWL <0.01 nm/°C)—can be supplied upon request for system-level tolerance analysis. For traceability in GLP/GMP environments, batch-specific certificates of conformance include lot number, coating run ID, substrate serial traceability, and date-stamped spectral validation logs.

Applications

• Laser line cleanup and harmonic separation (e.g., isolating 532 nm SHG output while rejecting 1064 nm fundamental in DPSS lasers).
• Fluorescence excitation/emission filtering in confocal and widefield microscopy—particularly for multicolor imaging with overlapping fluorophore spectra (e.g., FITC/TRITC/Cy5 triple labeling).
• Raman spectroscopy notch and edge filtering, where high out-of-band rejection prevents Rayleigh scatter saturation of CCD/CMOS detectors.
• Gas sensing and environmental monitoring: selective detection of absorption lines for NO₂ (405 nm), O₃ (254 nm), CH₄ (1650 nm), and CO₂ (2004 nm) using tunable diode laser absorption spectroscopy (TDLAS).
• Quantum key distribution (QKD) systems requiring precise spectral gating of single-photon detectors operating at 850 nm, 1310 nm, or 1550 nm telecom bands.
• OEM integration into portable spectrometers and handheld analyzers where thermal and mechanical stability under field conditions is critical.

FAQ

What is the angular sensitivity of the Meg1132 filter?
The center wavelength shifts approximately +0.2 nm per degree increase in angle of incidence (AOI) from 0° to 5°. For critical wavelength alignment, use AOI ≤ ±3°; custom designs with AOI-compensated coatings are available.
Can the Meg1132 withstand high-power laser irradiation?
Standard versions are rated for CW power densities up to 500 mW/mm² at 532 nm and 1 W/mm² at 1064 nm (ISO 21254-1 tested). High-LIDT variants with fused silica substrates and low-absorption coatings support >5 J/cm² (10 ns, 10 Hz, 1064 nm).
Is custom center wavelength or FWHM available?
Yes. Custom CWLs within 300–2000 nm and FWHM options of 3 nm, 5 nm, or 15 nm are offered with MOQ 10 pcs and lead time ~6 weeks.
Do you provide mounting solutions or housed versions?
Unmounted filters are standard. SM1- and SM2-threaded aluminum mounts (with black anodized finish and kinematic locking) are available as accessories. Custom housed versions with AR-coated windows and magnetic retention are supported for OEM volume orders.
How is spectral calibration performed and documented?
Each production lot undergoes full-spectrum scanning (200–2000 nm) on a double-monochromator spectrophotometer referenced to NIST SRM 2036. A digital spectral certificate—including CWL, FWHM, T_max, and OD values at key rejection bands—is provided with every shipment.