MiXran Meg1022 Pre-Mounted Achromatic Negative Doublet Lens with Standard Focal Length

Overview

The MiXran Meg1022 is a pre-mounted achromatic negative doublet lens engineered for high-fidelity beam expansion, collimation correction, and optical system inversion in visible-light laboratory instrumentation. As a compound lens element, it corrects both axial (longitudinal) and lateral (transverse) chromatic aberration across the 400–700 nm spectral band—critical for applications requiring broadband color fidelity and minimal focus shift with wavelength. Its negative focal power enables divergent beam generation, telecentric path reversal, and Galilean telescope configurations without introducing significant spherical or coma distortion. The lens is fabricated from BK7 and SF2 (or equivalent low-dispersion/high-refractive-index glass pairs), optimized using classical achromat design principles to achieve near-zero secondary spectrum over the VIS range. All units are assembled in temperature-stable aluminum housings with kinematic alignment features, ensuring repeatable mounting and long-term mechanical stability under typical lab environmental conditions (20–25°C, 40–60% RH).

Key Features

• Pre-aligned and factory-tested achromatic doublet with verified wavefront error ≤ λ/4 @ 632.8 nm (per ISO 10110-5)
• Broadband anti-reflection coating applied to both surfaces: average reflectance < 0.5% across 400–700 nm, minimizing ghosting and intensity loss
• Standardized metric thread interfaces: M28.5×0.6 for Ø25.4 mm variants; M42×0.75 or M48×0.75 for Ø40 mm variants—fully compatible with OB-series optical rails, lens tubes, and cage systems
• Mechanically robust housing with black anodized aluminum body, integrated retaining rings, and internal baffling to suppress stray light
• Supplied with reversible aluminum protective caps (front and rear) for dust mitigation and surface preservation during storage or transport
• Traceable serial numbering and individual test report including focal length verification (±0.3% tolerance), centration error (< 3 arcmin), and surface quality (40-20 scratch-dig per MIL-PRF-13830B)

Sample Compatibility & Compliance

The Meg1022 series supports integration into ISO-standard optical benches, modular cage systems (e.g., Thorlabs 30 mm and 60 mm), and custom OEM platforms requiring stable, field-ready negative optics. Each lens variant complies with ISO 10110-1 (optical drawing specifications), ISO 10110-7 (surface imperfections), and RoHS Directive 2011/65/EU for hazardous substance restrictions. While not certified for medical or aerospace use out-of-the-box, the lenses meet baseline requirements for GLP-aligned optical calibration workflows—including those supporting ASTM E275 (spectrophotometer validation) and ISO/IEC 17025-accredited labs where traceable component performance is documented. No regulatory filings (e.g., FDA 510(k), CE marking for active devices) apply, as these are passive optical components.

Software & Data Management

As a passive optical component, the Meg1022 does not incorporate embedded firmware, drivers, or digital interfaces. However, its metrological parameters—including effective focal length (EFL), back focal length (BFL), clear aperture (CA), and coating spectral data—are provided in machine-readable format (CSV and PDF) with each shipment. These datasets are structured to integrate directly into optical design software environments such as Zemax OpticStudio, CODE V, and FRED via importable .DAT or .SLD files. Traceability documentation includes NIST-traceable interferometric verification records, enabling full audit trails for ISO/IEC 17025 quality management systems. No proprietary software is required; all performance data conforms to SI units and international photometric conventions.

Applications

• Beam expansion in laser diode collimation systems operating at 405 nm, 532 nm, and 635 nm wavelengths
• Inversion optics in stereo microscopy illumination paths and Köhler illumination setups
• Negative elements in Galilean beam expanders for ultrafast Ti:sapphire and fiber laser systems
• Chromatic aberration compensation in multi-wavelength fluorescence imaging subsystems
• Reference optics in optical null testing, autocollimation, and shear plate interferometry
• OEM integration into spectrometer fore-optics, OCT sample arms, and compact hyperspectral sensor modules

FAQ

Is the Meg1022 suitable for UV or NIR applications?
No—the broadband AR coating is optimized exclusively for 400–700 nm. For UV (700 nm), custom-coated variants are available upon request with specified spectral bands and reflectance targets.
Can I mount this lens directly into a C-mount or F-mount adapter?
Not natively—the Meg1022 uses metric thread interfaces (M28.5, M42, or M48). Mechanical adapters for C-mount (17.526 mm flange focal distance) or F-mount (46.5 mm) require custom spacers and may compromise optical alignment; we recommend using dedicated lens tubes or cage-compatible mounts.
What is the maximum permissible incident power density?
For continuous-wave visible lasers, the damage threshold is ≥5 J/cm² at 532 nm, 10 ns pulse width, 10 Hz repetition rate (tested per ISO 21254-1). For CW operation, thermal lensing becomes limiting above 2 W/mm² on coated surfaces.
Do you provide prescription data or Zemax files?
Yes—each unit ships with a unique Zemax .ZMX file containing exact surface curvatures, thicknesses, glass types, and coating models, fully parameterized for system-level optimization.
Are custom focal lengths or diameters available?
Yes—MiXran offers tailored achromat designs (including negative doublets) from Ø12.7 mm to Ø75 mm, with EFLs ranging from −12.5 mm to −500 mm, subject to minimum order quantities and lead time confirmation.