MiXran Meg1018 Achromatic Negative Cemented Doublet Lens

Overview

The MiXran Meg1018 is a precision-engineered achromatic negative cemented doublet lens designed for demanding optical systems requiring chromatic aberration correction across visible or near-infrared spectral bands. Based on classical two-element cemented architecture, the Meg1018 utilizes carefully selected glass pairs—such as BK7/F2, N-BAF10/N-SF6HT, and N-BAK4/SF5—to minimize longitudinal and lateral color over its specified wavelength range. Unlike simple singlet negative lenses, this doublet delivers significantly improved spot size stability and reduced focal shift with wavelength variation—critical for beam expansion, relay imaging, laser cavity design, and collimation reversal applications where wavefront fidelity must be preserved. Each lens is manufactured under controlled cleanroom conditions, with optical surfaces polished to λ/4 RMS wavefront accuracy and centering maintained within 3 arcminutes. The design conforms to ISO 10110-1 dimensional and surface quality standards, ensuring interchangeability and predictable performance in OEM and research-grade assemblies.

Key Features

• Achromatic correction optimized for either visible spectrum (400–700 nm) or NIR band (650–1050 nm), with broadband anti-reflection coating applied via ion-assisted e-beam deposition
• Cemented doublet structure eliminates air gaps, enhancing mechanical stability and reducing ghost reflections and polarization sensitivity
• Multiple diameter options (12.5 mm, 12.7 mm, 25 mm, 25.4 mm, 40 mm) and EFL variants (–20 mm to –200 mm) support modular integration into standard optomechanical platforms
• High-precision mounting compatibility with LM127, LM250, LM254, and LM400-series lens holders—enabling repeatable alignment without custom adapters
• Surface quality rated at 40–20 scratch-dig per MIL-PRF-13830B; clear aperture ≥90% of nominal diameter
• Center thickness tolerance ±0.05 mm; radius of curvature verified via interferometric null testing

Sample Compatibility & Compliance

The Meg1018 is compatible with standard optical breadboards, kinematic mounts, and cage systems (e.g., Thorlabs 30 mm and 60 mm cages). Its cemented construction ensures thermal stability up to +60 °C continuous operation, with coefficient of thermal expansion (CTE) matched between elements to limit stress-induced birefringence. All coatings meet ISO 9211-3 specifications for adhesion, durability, and environmental resistance (humidity, abrasion, and solvent exposure). For regulated environments—including ISO 13485-certified medical device R&D labs or GLP-compliant spectroscopy facilities—the lens documentation includes full traceability to raw material lot numbers, coating run logs, and metrology reports (interferometry, spectrophotometry, and centration verification). No hazardous substances are used in manufacturing; RoHS 3 and REACH compliance is certified per batch.

Software & Data Management

While the Meg1018 is a passive optical component, its performance parameters are fully integrated into industry-standard optical design software libraries. Zemax OpticStudio, CODE V, and Synopsys LightTools include built-in prescription data for all Meg1018 variants—including exact glass indices (Schott catalog references), thermal coefficients, and measured coating reflectance curves (400–700 nm and 650–1050 nm bands). CAD models (STEP and SAT formats) with GD&T annotations are available upon request for mechanical integration validation. For quality assurance workflows, each unit ships with a digital certificate of conformance (CoC) containing interferometric wavefront maps, spectral transmission data, and mounting interface dimensions—exportable in CSV and XML for LIMS or PLM system ingestion.

Applications

• Laser beam expansion and collimation reversal in ultrafast and CW laser systems (Ti:Sapphire, Nd:YAG, fiber lasers)
• Chromatic aberration compensation in multi-wavelength fluorescence microscopy and confocal scanning optics
• Negative power elements in Galilean telescope designs and anamorphic beam shaping systems
• Optical path folding and pupil relay in compact spectrometers and OCT probe optics
• Reference elements in metrology setups requiring stable, low-wavefront-error diverging optics
• Education and prototyping platforms where cost-effective, high-fidelity achromats are required for undergraduate and graduate optics laboratories

FAQ

What wavelength ranges are supported by the Meg1018 series?

The Meg1018 is offered in two standard configurations: visible-optimized (AR coated 400–700 nm) and NIR-optimized (AR coated 650–1050 nm). Custom coatings for other bands (e.g., UV-enhanced or SWIR) are available upon request.
Is the cemented interface resistant to thermal cycling?

Yes. The optical cement used meets MIL-STD-810G thermal shock requirements (–40 °C to +70 °C, 10 cycles), with interfacial shear strength >12 MPa verified per ASTM C1144.
Can I use the Meg1018 in vacuum environments?

All standard variants are suitable for low-vacuum (<10⁻³ mbar) applications. For UHV compatibility (≤10⁻⁹ mbar), specify low-outgassing cement and coating processes during ordering.
Are Zemax files provided with purchase?

Yes. A ZIP archive containing .ZMX files for all standard variants—including glass dispersion models and measured coating data—is delivered electronically with the CoC.
Do you offer mounting hardware or adapters?

Standard lens mounts (LM127, LM250, LM254, LM400) are sold separately but dimensionally guaranteed for drop-in compatibility with Meg1018’s outer diameter and thread specifications (M12.5×0.5, M25.4×0.75, etc.).