Please note that all models of spectraval 1501 are no longer available since January 2025. The new specbos 2501 models cover all spectraval 1501 applications.
JETI spectraval 1501-LAN is a spectroradiometer for measuring Radiance in the visible spectral range and provides a variety of integral data. This spectroscopy instrument is suited for process applications and enables a precise and reliable measurement.
Process applications demand a 100 % reliable function of the measuring device under harsh conditions as an electromagnetically disturbed environment. Often there are small time periods between the measurements and the measurements have to be executed during many hours or days. A comparable application is the spectral measurement on a goniometer where hundreds or thousand of measurements have to be proceeded to get a precise Light Distribution Curve.
Optical parameters
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Measuring quantities
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All accessories of spectraval 1501-LAN are coded. The software switches to the related measuring mode and the appropriate calibration data will be used when an accessory was attached to the device.
Add-on optics for different measuring geometries
JETI offers a variety of add-on optics to achive certain different measuring geometries.
Standard diffusor
spectraval 1501-LAN measures in spectral Radiance mode. It is possible to convert it into a spectral Irradiance meter by attaching a diffusor.
90° diffusor
The standard diffusor of the device acts in line to the device. If the Illuminance at a low height above a surface needs to be measured, then the 90° diffusor can be applied. It is also available with attenuation filters to extend the Illuminance measuring range.
In axis remote diffusor
If the measurement needs to be done in locations with limited space conditions then the remote diffusor can be used. It is a diffusor which is coupled to the spectraval device by an optical fiber bundle. The measurement is done in axis to the fiber bundle. Different fiber lengths are available.
90° remote diffusor
If the measurement needs to be done under limited space conditions and the in axis fiber coupled diffusor is not suited, then the 90° fiber coupled diffusor can be applied. Different fiber lengths are available.
Dome
The dome is equipped with a glass dom and it is IP67 tested. It can be mounted on roofs or outside walls and allows a detection of the optical sky radiation.
Fast diffusors
If low Illuminance levels must be measured, then the measuring time will be long when using the standard diffusor of the device. It is possible to use “fast” diffusors, but only if the cosine matching of the diffusor is not of primary importance, e.g. in case of point like sources.
Neutral density filter
spectraval 1501-LAN can measure up to 100 000 cd/m² (typical white LED spectrum). An additional neutral density filter allows to shift the measuring range towards higher Luminance levels.
Dolby/realD filter cap pairs
The calibration of 3D projectors needs to be done through the right and left eye glasses. spectraval 1501-LAN can be equipped with caps containing the filters of Dolby and realD projection. The usage of these filter pairs allows a precise measurement of 3D projections.
Straylight protection tube
The straylight protection tube prevents the influence of surrounding light on Radiance measurements. It is mainly used for display measurements.
General applications |
Display and projection measurement |
Operating Instructions JETI spectraval (2.45 MB) Operating Instructions JETI LiVal (8.62 MB) Operating Instructions Firmware (448.02 KB) 
JETI LiVal Demo (6.07 MB) JETI LiVal Version 8.0.8 (6.07 MB) JETI LiVal Changelog (692.48 KB) TN05 Measuring Ranges of JETI Spectroradiometers (359.01 KB) TN09 Testing the communication with Terminal (275.39 KB) 
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