MiXran Meg1008 UV-Fused Silica Drum Lens
| Brand | MiXran |
|---|---|
| Model | Meg1008 |
| Material | UV-Grade Fused Silica |
| Lens Type | Drum (Cylindrical) Lens |
| Coating Options | Uncoated or Broadband AR Coating (250–400 nm) |
| Diameter | 25–50 mm |
| Focal Length (EFL) | 25–80 mm |
| Back Focal Length (BFL) | 0.74–2.36 mm |
| Center Thickness | 2.5–8 mm |
| Surface Quality | 40-20 Scratch-Dig |
| Surface Flatness | λ/4 @ 633 nm |
| Transmission Range | 185–2100 nm (UV-grade fused silica) |
| Damage Threshold | >5 J/cm² @ 355 nm, 10 ns, 20 Hz |
Overview
The MiXran Meg1008 is a precision-engineered UV-grade fused silica drum lens designed for high-fidelity beam shaping and line-generation applications in ultraviolet optical systems. Unlike spherical lenses, drum lenses possess cylindrical symmetry—curved along one axis and flat along the orthogonal axis—enabling focused line illumination or anamorphic beam expansion/compression. Constructed from Corning 7980 or equivalent UV-fused silica, the Meg1008 exhibits exceptional transmission (>99.5% per surface with AR coating) across the deep UV (250 nm) to near-IR spectrum, low thermal expansion (5.5 × 10⁻⁷ /°C), and high laser-induced damage threshold (LIDT). Its geometry supports integration into spectroscopic light sources, UV lithography alignment subassemblies, fluorescence excitation lines, and laser material processing optics where uniform linear intensity profiles are required.
Key Features
- UV-optimized fused silica substrate with intrinsic hydroxyl content <1 ppm, minimizing absorption at 185–250 nm
- Precision diamond-turned or polished cylindrical surface with RMS surface roughness <5 Å
- Available uncoated or with broadband anti-reflection (BBAR) coating optimized for 250–400 nm—meeting MIL-C-48497A spectral performance criteria
- Center thickness tolerance ±0.05 mm; focal length tolerance ±1% (standard); custom tolerances available per ISO 10110-3
- Compliant with ISO 10110-7 for surface imperfections: 40-20 scratch-dig specification as standard
- Optional certification documentation: interferometric wavefront map (Zygo Verifire report), spectral transmittance curve (PerkinElmer Lambda 950), and LIDT test report (per ISO 21254-1)
Sample Compatibility & Compliance
The Meg1008 is compatible with standard optomechanical mounts including SM1 (1.035″-40) lens tubes, kinematic lens holders (e.g., Thorlabs KLS series), and custom CNC-machined aluminum or Invar fixtures. All lenses undergo cleaning per ISO 14644-1 Class 5 cleanroom protocols and are packaged in nitrogen-purged, static-dissipative containers. The UV-grade fused silica meets ASTM F2653-21 for optical materials used in semiconductor photolithography tools and complies with RoHS 2015/863/EU and REACH SVHC requirements. Batch traceability is maintained via engraved product ID (e.g., GL27-040-050-UV) and digital certificate of conformance (CoC) aligned with ISO 9001:2015 manufacturing controls.
Software & Data Management
While the Meg1008 is a passive optical component, its design data—including Zemax-compatible .ZBF files, STEP geometry models, and thin-lens paraxial parameters—is provided upon request for system-level ray tracing (Zemax OpticStudio, CODE V, FRED). Spectral transmittance datasets (.CSV) and measured wavefront error maps (.MAT) are archived for 10 years and accessible via secure client portal under NDA. For regulated environments (e.g., FDA-regulated UV disinfection device development), MiXran provides audit-ready documentation packages supporting 21 CFR Part 11 compliance—including electronic signatures, version-controlled revision history, and change control logs for all certified units.
Applications
- UV laser line generation for wafer inspection and mask alignment in photomask fabrication
- Anamorphic beam correction in excimer laser delivery systems (e.g., KrF 248 nm, ArF 193 nm)
- Uniform line illumination in UV-Vis microspectrophotometers and hyperspectral imaging engines
- Focusing optics in compact UV Raman spectrometers requiring minimal chromatic aberration
- Beam homogenization elements in UV LED-based curing systems (365–405 nm)
- Collimation and focusing stages in vacuum-UV (VUV) monochromators operating down to 185 nm
FAQ
What is the difference between a drum lens and a cylindrical lens?
Drum lenses are a subset of cylindrical lenses—specifically those with a cylindrical barrel form factor and plano-convex or plano-concave cylindrical surfaces. The Meg1008 uses plano-convex cylindrical geometry optimized for 1D focusing.
Can the Meg1008 be used below 250 nm?
Yes—the UV-grade fused silica substrate transmits effectively down to 185 nm; however, the standard BBAR coating is optimized for 250–400 nm. For VUV applications, uncoated versions or custom MgF₂-coated variants are recommended.
Is centering error specified for these lenses?
Standard centering tolerance is ≤3 arcmin (per ISO 10110-6); tighter tolerances (≤1 arcmin) are available with metrology report add-on.
Do you provide mounting adapters or kinematic cells?
MiXran offers optional SM1-threaded lens retainers and kinematic tip/tilt mounts compatible with standard optical tables; CAD models provided upon order.
How is thermal stability characterized?
Thermal lensing coefficient (dn/dT) is −9.3 × 10⁻⁶ /°C; focal shift vs. temperature is modeled per ISO 10110-12 and validated via interferometric measurement over −10°C to +60°C.
