MiXran Meg1129 Positive Meniscus Lens

Overview

The MiXran Meg1129 is a precision-engineered positive meniscus lens designed for beam shaping, collimation, and optical system correction in laboratory, industrial, and research-grade applications. As a converging lens with both surfaces convex—where the center radius of curvature is smaller than the outer radius—the Meg1129 exhibits low spherical aberration and controlled Petzval field curvature, making it particularly suitable for use in relay optics, laser cavity design, and imaging systems requiring minimized distortion across wide spectral bands. Constructed from high-homogeneity optical crown glass (BK7 or equivalent), each lens meets ISO 10110 surface quality standards (40-20 scratch-dig) and λ/4 surface flatness tolerance. Its meniscus geometry enables optimized performance when paired with plano or concave elements in compound lens assemblies, especially where compact focal lengths and reduced chromatic shift are required.

Key Features

• Precision-ground and polished positive meniscus geometry optimized for minimal wavefront error and high Strehl ratio in monochromatic and broadband illumination
• Multiple diameter options: 25.4 mm (1″) and 50.8 mm (2″) standard clear apertures, supporting integration into OEM modules and modular optical benches
• Five focal length variants: 100 mm, 125 mm, 150 mm, 200 mm, and 300 mm EFL, each with fully characterized R₁, R₂, BFL, T_c, and T_e specifications
• Four coating configurations: uncoated (for UV-compatible or custom coating substrates), VIS broadband anti-reflection (400–700 nm, R_avg < 0.5%), NIR broadband AR (650–1050 nm), and SWIR broadband AR (1000–1650 nm), all deposited via ion-assisted e-beam evaporation
• Traceable metrology: Each lens is supplied with individual test report including interferometric surface figure data, transmitted wavefront error (TWE), and spectral reflectance curves
• Compliant with ISO 10110-1 (general tolerances), ISO 10110-2 (surface form), and MIL-PRF-13830B (surface imperfections)

Sample Compatibility & Compliance

The Meg1129 lens is compatible with standard kinematic mounts, lens tubes (SM1 and SM2 threading), and optomechanical breadboards used in academic and industrial labs. Its thermal expansion coefficient (~7.1 × 10⁻⁶ /°C for BK7) ensures dimensional stability under ambient lab conditions (15–30 °C). All coated variants meet RoHS Directive 2011/65/EU and REACH Annex XVII compliance requirements. For regulated environments—including GLP-compliant analytical labs and ISO/IEC 17025-accredited calibration facilities—the lens may be integrated into validated optical subsystems where traceability to NIST-traceable interferometry and spectrophotometry is maintained through batch-level certification documentation.

Software & Data Management

While the Meg1129 is a passive optical component, its full geometric and spectral specifications are provided in machine-readable formats (CSV and JSON) for integration into optical design workflows. These datasets are compatible with Zemax OpticStudio, CODE V, and FRED ray-tracing platforms. Each product shipment includes a digital certificate of conformance (CoC) with unique serial identifiers linked to metrology records. Optional add-ons include calibrated spectral transmittance reports (per ASTM E308-23) and interferometric surface map exports (Zernike polynomial coefficients up to 37 terms), supporting audit-ready documentation for FDA 21 CFR Part 11–aligned quality management systems.

Applications

• Laser diode collimation in fiber coupling and free-space communication systems
• Beam expansion and focusing in confocal microscopy and OCT light engines
• Correction element in multi-lens objectives for visible and NIR spectral domains
• Input/output optics in FTIR spectrometers and hyperspectral imaging systems
• Custom relay lenses for SWIR camera modules in semiconductor inspection and agricultural remote sensing
• Educational optics kits for undergraduate physics laboratories demonstrating Gaussian beam propagation and aberration theory

FAQ

What is the difference between a positive meniscus lens and a biconvex lens of identical focal length?
A positive meniscus lens has unequal radii of curvature (|R₁| < |R₂|) and thicker center, resulting in lower spherical aberration and improved off-axis performance compared to symmetric biconvex designs—particularly beneficial in wide-field or high-NA systems.
Can the Meg1129 be used in vacuum or high-humidity environments?
Uncoated and VIS-coated variants are rated for operation in ambient air (up to 85% RH non-condensing); NIR and SWIR coatings are optimized for low outgassing and may be qualified for UHV applications upon request with additional bake-out validation.
Is there a tolerance specification for focal length variation across the production lot?
All Meg1129 lenses are manufactured to ±0.5% EFL tolerance at 587.6 nm (d-line), verified by collimator-based focal length measurement per ISO 10110-5.
Do you provide mounting adapters or lens cells for the Meg1129 series?
Standard SM1-threaded lens cells (LCP1/M) and kinematic mounts (KM100) are available as optional accessories; custom cell designs (e.g., anodized aluminum housings with thermal compensation features) can be quoted upon engineering review.
Are Zemax-compatible .ZAR files available for this lens?
Yes—parameterized sequential models (.ZAR) and non-sequential scattering models (.NSC) are provided free of charge with bulk orders (>10 units) or upon request with NDA execution.