De Specbos 2501 is een  zeer nauwkeurige en economische spectroradiometer van referentiekwaliteit voor diverse toepassingen, waaronder monitor- en projectorkalibratie en het meten van verschillende soorten beeldschermen. Het instrument meet de spectrale radiantie in het zichtbarebereik en UV (optioneel) en levert een enorme hoeveelheid gegevens.

Speciale versies van het instrument omvatten LAN, PoE (Power over Ethernet), Bluetooth als mogelijke interfaces en uiteenlopende meetbereiken als HiRes (verhoogde optische resolutie), NIR (met een golflengtebereik tot 1000 nm) en UV (Ultraviolet meten van 250 tot 1000nm).

Optical parameters

• Spectral range 2501: 380 … 780 nm
• Spectral range 2501-NIR: 380 … 1000 nm
• Spectral range 2501-UV: 250 … 1000 nm
• Optical bandwidth 4.0 nm (2.0 nm HiRes version)
• Wavelength resolution 1.0 nm
• Digital electronic resolution 16 bit ADC
• Viewing angle 1.8° (Radiance mode)
• Measuring distance/ diameter 20 cm – Ø 7 mm; 100 cm – Ø 33 mm

Measuring quantities

• Spectral Radiance
• Luminance
• Total Radiance
• xy and u' v' coordinates
• Dominant wavelength, Color purity
• RGB
• Correlated Color Temperature (CCT)
• CRI
• CQS
• TM-30
• Circadian metrics
• PAR
• Etc.

Meetbereik en meetonzekerheid (according to CIE TN 009:2019)

• Luminance measuring range 0.2 ... 150 000 cd/m² (Illuminant A)
• 0.2 … 100 000 cd/m2 (typical warm white LED)
• Luminance uncertainty ± 3.5 % (Illuminant A @ 100 cd/m2, k=2)
• Luminance reproducibility ± 1 % (Illuminant A)
• Chromaticity uncertainty ± 0.002 x, y (Illuminant A, k=2)
• Color repeatability ± 0.0005 x, y (Illuminant A)
• Illuminance measuring range 1 ... 800 000 lx (Illuminant A)
• 1 … 500 000 lx (typical warm white LED)
• Illuminance accuracy ± 2.4 % (Illuminant A @ 2000 lx, k=2)
• CCT repeatability ± 20 K (Illuminant A)
• Max. wavelength error ± 0.3 nm (HgAr line source)
• Polarization error f8 < 1 %

General applications

• Spectral measurements in production and production environment
• Radiant intensity calculation using Irradiance measurement
• Irradiance calculation using Radiance measurement

Display and projection measurement

• Adjustment of digital projectors in cinemas
• Color adjustment of broadcast and consumer monitors
• Measurement of RGB laser projection
• Measurement of small symbols and display segments
• Calibration of ambilight TV

LED measurement

• Optical characterization of LEDs
• Ranking of LEDs and other light sources
• Measurement of OLED modules

Lamps

• Burn in tests of lamps

Light effects

• Measurement in architecture and architecture models
• Measurement of street lighting
• CRI adjustment of surgerial lamps
• Circadian metrics

Miscellaneous

• Application of different color matching functions
• Correction measurement for Tristimulus instruments
• Long term measurements of daylight and in green houses
• General transmission/reflexion measurements
• Remote sensing
• Measurements in strong magnetic fields
• Special new “Visual appearance” calculations

• PC software JETI LiVal for Windows 10/11,
• Operating instructions
• Software development kit (flash drive)
• USB cable
• Battery charger
• Tripod
• Carrying case
• Protection cap
• Calibration certificate NIST traceable

• Integrating sphere
• Filters and difusor (irradiance/luminance)
• Side view and fiber extended diffusors
• Add-on optics
• Etc.