The spectroradiometer JETI specbos 2501-UV extends the original wavelength range from 200 nm … 1100 nm. In its basic configuration, the instrument measures spectral Radiance. It is possilbe to convert the measurement mode into a spectral Irradiance meter by attaching an optional diffusor. All other parameters as sensitivity, viewing angle in Radiance mode and optical resolution remain the same as of the standard device.
The latest generation of JETI’s Specbos range of spectroradiometers, the Specbos 2501 improves upon the highly successful Specbos 1201 and 1211. Offering the same versatility, the Specbos 2501 is configured for measuring spot spectral radiance (luminance), but by attaching an optional cosine diffuser, the Specbos 2501 can also be used to measure spectral irradiance (illuminance).
Being a spectroradiometer, the Specbos 2501 measures the spectral radiance or irradiance of the light source between 380 and 780nm (380-1000nm for the NIR model, 200nm-1000nm for the UV model) and accurately computes all of the derived photometric and colorimetric parameters, including luminance, illuminance, CIE chromaticity, correlated colour temperature (CCT) and colour rendering index (CRI), as well as circadian and other radiometric parameters. Accessory focussing optics are available to reduce the measurement area down to as small as 0.5mm diameter.
Accessory optics are now available for measuring the luminance of AR/VR glasses.
Highlights
The Specbos 2501 series
A focus accessory for measuring the luminance of small spots is available for all models.
Spectral Range | Specbos 2501: 380 – 780nm |
Optical Resolution (FWHM) | 4.0 nm (all versions) |
Wavelength Resolution | 1.0 nm |
Digital Electronic Resolution | 16 bit ADC |
Viewing Angle | 1.8° (radiance mode) |
Measuring Distance/ Diameter | 20cm – Ø7mm (measured from the front end of the device) |
Measuring Values | Spectral radiance, luminance, total (in band) radiance, chromaticity (x,y, u’,v’), CCT, CRI, colour purity, RGB, PAR, TLCI, circadian metrics and others With optional diffuser : spectral irradiance, illuminance and total (in band) irradiance |
Luminance Measuring Range | 0.2 … 150 000 cd/m² (Illuminant A) (Higher values with optional filter) |
Luminance Accuracy | ± 3.5 % (Illuminant A @ 100 cd/m2, k=2) |
Luminance Reproducibility | ± 1 % |
Chromaticity Accuracy | ± 0.002 x, y (Illuminant A, k=2) |
Colour Reproducibility | ± 0.0005 x, y (Illuminant A) |
Illuminance Measuring Range | 1 – 800 000 lx (Illuminant A) |
Illuminance Accuracy | ± 2.4 % (Illuminant A @ 2000 lx, k=2) |
CCT Reproducibility | ± 20 K (Illuminant A) |
Max. Wavelength Error | ± 0.3 nm (HgAr line source) |
Polarization Error F8 | < 1 % |
Dispersive Element | Imaging grating (flat field) |
Light Receiving Element | Back thinned CMOS/ CCD array 2048 pixels |
Power Supply | USB Hub powered, optionally PoE |
Interface | USB 3.0 and Bluetooth (Specbos 2501) |
Dimensions (LxWxH) | 186 x 105 x 50mm |
Weight | 1000 g |
Operating Conditions | Temperature 10 – 40 °C |
Accessories (Included) | PC software JETI LiVal for Windows 10/ 11, operating instructions and software development kit on USB flash drive, USB cable, battery charger, tripod, carrying case, protection cap, calibration certificate |
Accessories (Optional) | Integrating sphere, filters, side view and fiber extended diffusors, add-on optics |
Calibration | NIST traceable, recommended recalibration interval: 1 year |
Examples for applications of Specbos 2501 / 2501-HiRes / 2501-NIR:
Examples for applications of Specbos 2501-UV:
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