MiXran Meg1050 High-Precision UV-Fused Silica Right-Angle Prism
| Brand | MiXran |
|---|---|
| Origin | Beijing, China |
| Manufacturer Type | Authorized Distributor |
| Product Category | Optical Component |
| Model | Meg1050 |
| Material | UV-Grade Fused Silica |
| Prism Angle Tolerance | ±15″ (standard), ±30″ (5 mm variant) |
| Coating Options | Uncoated |
| Dimension Range | 5–25 mm leg length |
| Surface Quality | 20–10 scratch-dig |
| Surface Flatness | λ/8 @ 633 nm |
| Transmission Range | 185–2100 nm |
| Refractive Index Homogeneity | Δn ≤ 5×10⁻⁶ |
Overview
The MiXran Meg1050 is a high-precision right-angle prism engineered from UV-grade fused silica—a material selected for its exceptional transmission in the deep ultraviolet (DUV) spectrum down to 185 nm, low thermal expansion coefficient (5.5×10⁻⁷ /°C), and superior homogeneity. Unlike standard optical glass prisms, the Meg1050 leverages the intrinsic properties of synthetic fused silica to maintain wavefront fidelity under demanding photonic conditions, including excimer laser illumination (e.g., ArF at 193 nm), broadband UV spectroscopy, and precision alignment in vacuum-compatible optical trains. Its 90° apex angle is manufactured to tight angular tolerances—±15 arcseconds across most standard sizes (6.3 mm to 25 mm leg length) and ±30 arcseconds for the 5 mm variant—ensuring minimal beam deviation and high spatial reproducibility in retroreflection or beam folding configurations. The prism operates on total internal reflection (TIR) principles when used uncoated; however, optimized coatings extend functionality into low-reflectivity or polarization-sensitive applications.
Key Features
- UV-grade fused silica substrate with certified OH-content <1 ppm, enabling high transmission below 200 nm without solarization-induced degradation
- Precision-polished faces meeting λ/8 surface flatness (measured at 633 nm HeNe wavelength) and 20–10 scratch-dig surface quality per MIL-PRF-13830B
- Controlled refractive index homogeneity (Δn ≤ 5×10⁻⁶) verified via interferometric mapping, critical for minimizing phase distortion in interferometric and coherent optical systems
- Two standard coating configurations: (1) Uncoated for maximum TIR efficiency above ~400 nm; (2) UV-aluminum reflective coating on the hypotenuse face combined with UV-optimized anti-reflection (AR) coating on both right-angle faces (R<0.5% avg. from 200–400 nm)
- Traceable dimensional certification: each unit supplied with individual test report listing measured apex angle, leg length tolerance (±0.05 mm), and surface figure data
- Vacuum-compatible design with no organic binders or cement—suitable for UHV environments up to 10⁻⁹ mbar
Sample Compatibility & Compliance
The Meg1050 is compatible with standard optomechanical mounting solutions—including kinematic prism mounts, cage system adapters (e.g., Thorlabs CAGE), and custom-designed lens tubes—without requiring adhesive bonding. Its material compliance meets RoHS Directive 2011/65/EU and REACH Annex XVII requirements. While not a regulated medical or aerospace device, the prism conforms to ISO 10110-7:2017 for specification of optical element geometry and surface imperfections. For applications governed by FDA 21 CFR Part 11 or EU GMP Annex 11, documentation packages—including raw material certificates of conformance (CoC), coating deposition logs (where applicable), and metrology traceability to NIM (National Institute of Metrology, China)—are available upon request for audit readiness.
Software & Data Management
No embedded firmware or proprietary software is associated with the Meg1050, as it is a passive optical component. However, integration into optical design workflows is fully supported: Zemax OpticStudio and CODE V files containing exact surface prescriptions (including measured wedge error and coating dispersion models) are provided upon order confirmation. All dimensional and interferometric measurement data are archived in CSV and PDF formats compliant with ISO/IEC 17025:2017 documentation standards. Traceability records include calibration certificate numbers linked to NIM-accredited interferometers (e.g., Zygo Verifire™ with λ/100 reference flats).
Applications
- Retroreflector assemblies in UV laser interferometers (e.g., gravitational wave detection path-length stabilization)
- Beam folding and redirection in DUV lithography mask inspection tools and synchrotron beamlines
- Reference elements in high-accuracy autocollimators and angle-measuring interferometers
- Input/output coupling optics for UV Raman spectrometers and time-resolved fluorescence setups
- Alignment fiducials in cryogenic optical benches where thermal hysteresis must be minimized
- Calibration standards for angular metrology labs performing ISO 230-1 testing of CNC machine tool squareness
FAQ
Is the Meg1050 suitable for 193 nm ArF excimer laser applications?
Yes—the UV-grade fused silica substrate and optional UV-AR coatings are qualified for continuous-wave and pulsed operation at 193 nm, with laser-induced damage threshold (LIDT) exceeding 500 mJ/cm² at 20 ns pulse width (tested per ISO 21254-1).
Can I specify custom dimensions or tighter angular tolerances?
Custom leg lengths, apex angles (e.g., 89.999° for controlled beam shear), and surface flatness (λ/10 or better) are available under OEM agreement with minimum order quantities and extended lead times.
What is the maximum operating temperature range?
The prism maintains optical performance from –60 °C to +350 °C; prolonged exposure above 500 °C may induce compaction-related index shifts.
Do you provide mounting fixtures or kinematic adapters?
Standard SM1- and SM2-threaded prism mounts compatible with the Meg1050 series are stocked and sold separately; custom adapter drawings (STEP/IGES) are provided free of charge.
Are coating durability tests performed per MIL-C-48497A?
Yes—adhesion, humidity, and abrasion resistance of all deposited coatings are validated per MIL-C-48497A Section 4.5.1, with test reports included in full compliance packages.
