KEWLAB KW11-050 Standard-Precision Plano Optical Window
| Brand | KEWLAB |
|---|---|
| Model | KW11-050 |
| Material | Precision-Annealed K9 Optical Glass |
| Diameter | 50 mm |
| Thickness | 4 mm |
| Surface Flatness | λ/2 @ 633 nm |
| Parallelism | < 1 arcmin |
| Surface Quality | 3–4 Scratch-Dig |
| Diameter Tolerance | +0.0 / –0.2 mm |
| Thickness Tolerance | ±0.2 mm |
| Edge | 0.2 mm × 45° chamfer |
| Optional Coatings | VIS AR (350–700 nm), NIR AR (600–1100 nm), SWIR AR (900–1700 nm) |
Ask about pricing, availability and specifications.
Overview
The KEWLAB KW11-050 is a standard-precision plano optical window engineered for stable transmission and minimal wavefront distortion in visible and near-infrared optical systems. Constructed from precision-annealed K9 borosilicate crown glass—a material widely specified in ISO 10110-2 and MIL-O-13830 standards—the window delivers consistent refractive index homogeneity (dn/dT ≈ 2.2 × 10⁻⁶ /°C) and low bubble/inclusion content. Its λ/2 surface flatness at 633 nm ensures negligible beam deviation (< 0.5 arcsec) under collimated illumination, while parallelism better than 1 arcminute maintains optical path integrity in multi-element assemblies such as laser cavities, interferometric setups, and spectrometer input stages. Designed for integration into OEM instrumentation and academic optical benches, the KW11-050 meets baseline mechanical and thermal stability requirements for non-critical alignment applications where high-end λ/10 optics are unnecessary but dimensional reliability remains essential.
Key Features
- Precision-annealed K9 optical glass substrate with certified homogeneity and stress birefringence < 5 nm/cm per ISO 10110-5
- λ/2 surface flatness referenced to HeNe wavelength (633 nm), verified via Fizeau interferometry
- Surface quality rated 3–4 scratch-dig per MIL-PRF-13830B, suitable for Class 1000 cleanroom handling
- Tight mechanical tolerances: diameter tolerance +0.0 / –0.2 mm; thickness tolerance ±0.2 mm
- 0.2 mm × 45° protective edge chamfer minimizes chipping during mounting and cleaning
- Optional broadband anti-reflection coatings deposited via ion-assisted e-beam evaporation, with R < 0.25% per surface across specified bands
Sample Compatibility & Compliance
The KW11-050 is compatible with standard kinematic and flexure-based window mounts (e.g., Thorlabs SM1-threaded cells, Newport V-Series holders) and withstands typical vacuum bake-out conditions up to 80 °C for ≤2 hours. All substrates comply with RoHS Directive 2011/65/EU and REACH Annex XVII restrictions on heavy metals. While not individually certified to ISO 9001 or ISO 14001, the manufacturing process adheres to documented quality control checkpoints aligned with ISO 10110 optical element specification standards—including surface figure verification, transmitted wavefront error assessment, and coating spectral performance validation per ISO 9211-3. No biocompatibility or FDA clearance applies, as this is a passive optical component intended for laboratory and industrial instrumentation only.
Software & Data Management
As a passive optical component, the KW11-050 requires no embedded firmware, drivers, or software interface. Spectral performance data—including measured reflectance curves for each AR coating variant—are provided in CSV and PDF format upon request and archived in KEWLAB’s optical component database (accessible via secure customer portal). Coating specifications conform to ISO 9211-3:2019 for optical coating nomenclature and test methodology. For traceability, each batch is assigned a unique lot ID linked to interferometric flatness reports and spectrophotometric coating verification logs—supporting GLP-compliant documentation workflows in regulated R&D environments.
Applications
- Laser system output couplers and harmonic separation windows (e.g., Nd:YAG fundamental/SHG/THG isolation)
- Input/output windows for FTIR spectrometers operating in VIS–NIR–SWIR ranges
- Protective covers for CCD/CMOS sensors in machine vision and metrology systems
- Reference flats in null-testing configurations for aspheric lens fabrication
- Beam sampling interfaces in optical power monitoring subsystems
- Educational optics kits requiring cost-effective, metrologically characterized components
FAQ
Is the KW11-050 suitable for high-power laser applications?
No—this window is not rated for high-power CW or pulsed laser use. It lacks LIDT certification and is intended for low-intensity diagnostic, alignment, or packaging roles.
Can custom diameters or thicknesses be ordered?
Yes—KEWLAB offers standard-precision plano windows in diameters from 12.7 mm to 100 mm and thicknesses from 2 mm to 10 mm, subject to minimum order quantities and lead-time confirmation.
What is the typical coating damage threshold for the AR variants?
Coating LIDT has not been formally tested per ISO 21254; users must perform application-specific qualification under representative fluence and pulse duration conditions.
Are measurement certificates included with shipment?
A basic conformance report listing measured diameter, thickness, and visual inspection results is provided. Full interferometric flatness reports and spectrophotometric coating data are available upon request at no additional charge.
Does the window meet vacuum compatibility requirements?
Yes—it exhibits outgassing rates below 1.0 × 10⁻⁵ Pa·m³/s·m² per ASTM E595 when baked at 80 °C for 2 hours, making it suitable for moderate-vacuum optical chambers.
