MiXran Meg1123 Laser-Grade Plano-Convex Fused Silica Lens
| Brand | MiXran |
|---|---|
| Model | Meg1123 |
| Substrate | Corning 7978 Fused Silica |
| Diameter | 25.4 mm |
| Effective Focal Lengths | 33–1000 mm |
| Coating Options | AR@355 nm, AR@532 nm, AR@1064 nm, AR@532/1064 nm dual-band |
| Laser Damage Threshold | ≥20 J/cm² (10 ns, 10 Hz, 1064 nm) |
| Surface Quality | 10-5 scratch-dig |
| Center Thickness | 3.352–14.43 mm (varies by EFL) |
| Radius of Curvature | 15.128–459 mm (varies by EFL) |
| Back Focal Length | 26.21–997.8 mm (varies by EFL) |
Overview
The MiXran Meg1123 is a precision-engineered plano-convex lens designed explicitly for high-power continuous-wave (CW) and pulsed laser systems operating at key industrial and scientific wavelengths: 355 nm (UV), 532 nm (green), and 1064 nm (NIR). Fabricated from Corning 7978 fused silica—a low-OH, high-LDT material with exceptional UV transmission, minimal thermal expansion (α ≈ 0.55 × 10⁻⁶ /°C), and intrinsic resistance to solarization—the Meg1123 meets stringent requirements for beam shaping, focusing, collimation, and harmonic generation in demanding optical setups. Its plano-convex geometry provides optimal aberration correction when the convex surface faces the collimated input beam, minimizing spherical aberration across the full focal range (33 mm to 1000 mm). Each lens undergoes interferometric verification for surface figure accuracy (λ/10 on plano side, λ/4 transmitted wavefront error), ensuring diffraction-limited performance in alignment-critical applications such as ultrafast amplifier seeding, laser material processing, and quantum optics experiments.
Key Features
- High laser damage threshold (LDT) ≥20 J/cm² @ 1064 nm, 10 ns pulse width, 10 Hz repetition rate—validated per ISO 21254-1
- Optimized anti-reflection (AR) coatings deposited via ion-assisted e-beam evaporation; single- or dual-band options available (e.g., AR@532/1064 nm)
- Consistent 25.4 mm clear aperture with tight dimensional tolerances: ±0.05 mm diameter, ±0.1 mm center thickness, ±0.2% EFL
- Surface quality rated to 10-5 scratch-dig per MIL-PRF-13830B, enabling compatibility with Class 100 cleanroom handling
- Low birefringence (<5 nm/cm) and homogeneity Δn < 1 × 10⁻⁶—critical for polarization-sensitive interferometry and cavity alignment
- Available in 13 standard effective focal lengths (33 mm, 50 mm, 75 mm, 100 mm, 125 mm, 150 mm, 200 mm, 250 mm, 300 mm, 350 mm, 400 mm, 500 mm, 1000 mm)
Sample Compatibility & Compliance
The Meg1123 lens is compatible with standard SM1 (1.035″-40) lens mounts and kinematic optical tables (e.g., Thorlabs, Newport). Its fused silica substrate exhibits negligible absorption at 355 nm, making it suitable for third-harmonic generation (THG) and UV lithography alignment. All AR coatings are qualified per ISO 9211-3 for environmental durability (adhesion, humidity, abrasion) and spectral stability over >10⁷ laser shots. The lens complies with RoHS 2015/863/EU and REACH SVHC regulations. While not certified to IEC 60825-1 for laser product safety, its optical design supports full system-level compliance when integrated into Class 4 laser enclosures meeting ANSI Z136.1-2022 requirements.
Software & Data Management
As a passive optical component, the Meg1123 requires no embedded firmware or driver software. However, comprehensive optical specification data—including measured transmission spectra (250–1100 nm), coating reflectance curves, and Zemax-compatible .ZBF files—is provided upon request for integration into ray-tracing simulations (Zemax OpticStudio, CODE V, FRED). Batch traceability is maintained via engraved product codes (e.g., GL21-025B-100-YA04) linked to interferometric test reports and LDT validation records. Documentation conforms to ISO 10110-7 for surface imperfections and ISO 10110-5 for surface form, supporting audit readiness under GLP and ISO/IEC 17025 laboratory accreditation frameworks.
Applications
- Focusing and collimation in Nd:YAG, Nd:YVO₄, and Ti:sapphire laser systems
- Beam delivery optics in industrial laser cutting, welding, and drilling stations
- Input/output coupling for optical parametric oscillators (OPOs) and frequency-doubled lasers
- Alignment references in ultrafast pump-probe spectroscopy and time-resolved fluorescence setups
- Objective elements in custom-built confocal microscopes operating at 532 nm excitation
- Replacement optics in OEM laser marking engines requiring high-reliability fused silica substrates
FAQ
What is the maximum incident angle for optimal AR coating performance?
AR coatings are optimized for near-normal incidence (0° ± 5°); performance degrades above 15° AOI due to polarization-dependent shift in center wavelength.
Can the Meg1123 be used in vacuum environments?
Yes—Corning 7978 fused silica has outgassing rates below 1.0 × 10⁻⁹ g/(cm²·s) per ASTM E595, and coatings are fully cured to minimize volatile organic compound (VOC) emission.
Is custom diameter or focal length available?
Yes—MiXran offers OEM customization including diameters from 12.7 mm to 75 mm, EFLs outside the standard series, and non-standard coatings (e.g., AR@266 nm, HR@1064 nm) with lead times of 6–8 weeks.
How is laser-induced damage tested and documented?
Each production lot undergoes ISO 21254-1-compliant testing using a Q-switched Nd:YAG laser at 1064 nm; certified LDT reports include fluence mapping, damage morphology imaging, and statistical confidence intervals (95% CI).
Do you provide mounting hardware or kinematic adapters?
Standard SM1-threaded lens tubes and retaining rings are available separately; custom kinematic mounts (e.g., tip-tilt stages with 5 µrad resolution) can be quoted upon request.
