JETI specbos 1211 Portable Spectroradiometer

Overview

The JETI specbos 1211 is a compact, high-performance portable spectroradiometer engineered for precision photometric and radiometric characterization of light-emitting devices and illuminated surfaces. Unlike traditional tristimulus colorimeters relying on filtered photodiodes, the specbos 1211 employs a high-resolution grating-based optical spectrometer with a back-thinned CCD detector, enabling true spectral acquisition across the ultraviolet, visible, and near-infrared domains (350–1000 nm standard; 250–1000 nm with UV-enhanced variant). Its core measurement principle is based on absolute spectral radiance detection—capturing full spectral power distribution (SPD) at each measurement point—thereby supporting CIE-compliant photometric (e.g., luminance Y, chromaticity x,y,u′,v′), radiometric (e.g., radiance L_e, irradiance E_e), and colorimetric calculations without interpolation or filter-mismatch error. Designed for both laboratory-grade validation and high-throughput production line deployment, the instrument delivers metrological performance comparable to reference-grade instruments such as the Konica Minolta CS-2000 and PR-705, verified through inter-laboratory comparison studies under ISO/IEC 17025-accredited conditions.

Key Features

• Integrated coaxial laser targeting system generating a concentric ring-shaped aiming spot—precisely indicating the 4 mm measurement area without parallax error
• Thermally stabilized optical bench and mechanical shutter for automatic dark current compensation, ensuring high signal-to-noise ratio and long-term repeatability (typical Δu′v′ < 0.001 over 8 hours)
• Modular optical interface: interchangeable focus lenses enable spot sizes of 3 mm, 1 mm, or 0.5 mm; optional integrating sphere (e.g., JETI IS-100) and goniophotometer adapters support total luminous flux (lm), intensity distribution (cd), and spatial uniformity analysis
• Multi-interface connectivity: USB 2.0 (bus-powered), Bluetooth 4.2 (Class 1, up to 100 m range), Gigabit Ethernet, and RS-232—enabling seamless integration into automated test stands or remote monitoring networks
• External trigger input (TTL-compatible) for synchronized measurements in pulsed-light environments (e.g., OLED PWM driving, flash LED testing)
• Robust aluminum housing rated IP52, operating temperature range: 5–40 °C, relative humidity ≤ 80 % non-condensing

Sample Compatibility & Compliance

The specbos 1211 is validated for quantitative evaluation of emissive and reflective samples including OLED, microLED, LCD, and QD displays; fluorescent and UV-C lamps; automotive lighting modules; architectural lighting systems; and medical illumination devices. It supports compliance verification against key regulatory frameworks: EU Directive 2006/25/EC (Artificial Optical Radiation), IEC/TR 62778 (blue light hazard assessment), IEC 62471 (photobiological safety), and ENERGY STAR SSL V2.1. Calibration certificates are issued with NIST-traceable reference standards and include uncertainty budgets per GUM (Guide to the Expression of Uncertainty in Measurement). The instrument’s firmware and LiMes software comply with GLP data integrity requirements—including electronic signatures, audit trails, and 21 CFR Part 11–ready configuration options upon request.

Software & Data Management

The specbos 1211 operates natively with JETI’s LiMes (Light Measurement Software), a Windows-based platform supporting real-time spectral visualization, multi-parameter pass/fail evaluation (with configurable tolerance windows per CIE 1931, CIE 1976 u′v′, or user-defined metrics), batch spectral averaging, and spectral arithmetic (e.g., ratio, difference, normalization). For industrial automation, the device exposes a comprehensive API suite: Radiometric DLLs for C/C++/.NET integration, LabVIEW Virtual Instruments (VIs), and SCPI-compatible serial command set (IEEE 488.2 compliant). All measurement data export to CSV (UTF-8 encoded), XLSX, and JETI’s native .jms binary format—with embedded metadata (timestamp, GPS coordinates if enabled, operator ID, calibration ID, and environmental sensor readings).

Applications

• Display manufacturing: white point tuning, gamma verification, Mura defect mapping, and viewing angle characterization of flat-panel displays
• LED lighting QA: binning by chromaticity shift (Δu′v′), CCT consistency, R_a/R₉ evaluation, and temporal stability under thermal stress
• UV curing system validation: spectral irradiance profiling (250–400 nm), dose accumulation, and lamp aging trend analysis
• Automotive HUD and instrument cluster certification: luminance uniformity, glare assessment, and spectral purity under varying ambient temperatures
• Research applications: spectral reflectance of pigments, fluorescence quantum yield estimation (with excitation source coupling), and circadian lighting metrics (melanopic EDI, α-opic irradiance)

FAQ

What spectral resolution does the specbos 1211 achieve?

The instrument provides an optical resolution (FWHM) of ≤ 3.5 nm across its operational range, with pixel resolution of 0.55 nm/channel (2048-pixel CCD).
Can it measure pulsed or modulated light sources?

Yes—via external TTL triggering with exposure time adjustable from 1 ms to 10 s, synchronized to source modulation frequency.
Is factory recalibration required annually?

JETI recommends annual recalibration against NIST-traceable standards; however, built-in shutter-based dark measurement and user-performed zero/white calibration extend interval validity under stable lab conditions.
Does it support spectral irradiance measurements?

Yes—when used with a calibrated cosine corrector (e.g., JETI CC-100), the specbos 1211 measures spectral irradiance (W·m⁻²·nm⁻¹) with angular response meeting ISO/CIE Class A requirements.
Can multiple units be controlled simultaneously via one PC?

Yes—LiMes supports daisy-chained USB or networked Ethernet configurations, allowing synchronized acquisition from up to 8 specbos units with timestamp alignment within ±100 µs.