UV Detection Card (UK-Made)

Overview

The UV Detection Card (UK-Made) is a passive, non-powered optical safety and alignment tool engineered for real-time visualization of ultraviolet (UV) and near-UV/blue-violet laser radiation (typically 200–450 nm). Unlike electronic detectors or thermal sensors, this card operates on photoluminescent conversion: incident UV photons excite proprietary phosphor compounds embedded in a stable polymer substrate, resulting in visible fluorescence (typically bright green or violet emission) proportional to irradiance. It is designed for qualitative beam profiling, alignment verification, and hazard identification in Class 3B and Class 4 laser systems—particularly where compactness, portability, and immediate visual feedback are critical. The card complies with fundamental laser safety principles outlined in IEC 60825-1 and ANSI Z136.1, serving as a supplementary verification tool—not a calibrated radiometric instrument.

Key Features

• Compact card format (standard A6 size: 105 × 148 mm) with rigid, matte-finish substrate for stable positioning during alignment procedures.
• High sensitivity to continuous-wave (CW) and pulsed UV sources, including 266 nm, 355 nm, and 405 nm lasers; detectable threshold estimated at <10 µW/cm² for CW 355 nm under ambient-dark conditions.
• Photostable phosphor formulation resistant to rapid bleaching—maintains consistent response over repeated short-duration exposures (<5 s per use).
• No battery, no electronics, no calibration drift: fully passive operation ensures reliability across laboratories, cleanrooms, and field service environments.
• Integrated reference scale (mm-graduated edge) supports approximate beam diameter estimation and spatial registration during optical setup.

Sample Compatibility & Compliance

The UV Detection Card is compatible with all free-space UV and violet laser beams operating within its spectral response range. It is not intended for use with deep-UV (10⁹ W/cm²), where nonlinear effects or substrate damage may occur. As a Class 1 accessory per IEC 60825-1 Annex D, it poses no inherent laser hazard when used as directed. While not a metrological instrument, its design aligns with ISO/IEC 17025 general requirements for supporting equipment used in accredited testing laboratories. Documentation includes CE marking per the EU Laser Products Directive and RoHS 3 compliance for restricted substances.

Software & Data Management

This device requires no software interface, drivers, or data acquisition systems. Its output is purely visual—intended for direct human observation and photographic documentation. Users may integrate captured images into standard lab documentation workflows (e.g., SOP records, alignment logs, GLP-compliant maintenance reports). When used alongside calibrated power meters or beam profilers, the card provides rapid spatial context—enabling correlation between visual spot location and quantitative irradiance measurements. No firmware updates, license keys, or audit trails apply, eliminating regulatory overhead associated with computerized systems under FDA 21 CFR Part 11 or EU Annex 11.

Applications

• Laser system commissioning and routine alignment of UV-curable optical benches, lithography stages, and spectroscopic setups.
• Safety verification prior to enclosure interlock bypass or service access—confirming absence of stray UV leakage from fiber couplers, harmonic generators, or OPO cavities.
• Educational demonstrations of UV photon interaction, fluorescence principles, and laser safety protocols in university physics and photonics labs.
• Field validation of UV LED arrays in disinfection equipment or forensic light sources, where rapid go/no-go assessment is required.
• Supporting ISO 11146-compliant beam parameter measurements by identifying centroid position and approximate M²-relevant mode structure before quantitative profiling.

FAQ

Is this card calibrated for quantitative irradiance measurement?
No. It is a qualitative indicator only. For traceable power or energy density values, use a NIST-traceable thermopile or photodiode-based sensor.
Can it be used with femtosecond UV lasers?
Not recommended. High peak intensities may cause localized ablation or irreversible phosphor saturation; consult pulse energy density limits before use.
How long does the fluorescence persist after exposure?
Visible afterglow decays within 1–3 seconds post-irradiation under typical lab lighting; persistence is intentionally short to support dynamic alignment tasks.
Is the card reusable?
Yes—provided exposure durations remain brief and cumulative fluence stays below manufacturer-specified thresholds (≤5 J/cm² total for 355 nm over product lifetime).
Does it require special storage conditions?
Store flat in original packaging, away from direct sunlight and humidity >60% RH to preserve phosphor integrity and prevent substrate warping.