Goniophotometer for medium and large light sources
Angle-dependent determination of photometric quantities
The LGS 650 was specially developed for the determination of angle-dependent spatial radiation properties of medium-sized to large SSL sources and LED modules, and is a space-saving and attractively priced alternative to the larger LGS 1000.
The sample is measured in a horizontal burning position and moved over an angle range of ± 160° in the direction of radiation of the sample around the gamma axis. The high angle resolution of 0.01° guarantees highly accurate and reproducible readings. The LGS 650 permits the mounting of samples with a diameter of 1300 mm and a maximum weight of 10 kg. It complies with all relevant CIE, DIN and IES standards.
Combined with an Instrument Systems spectroradiometer, e.g. the CAS 140D, radiometric, colorimetric and photometric quantities can be determined with the greatest precision as a function of angle. For particularly time-critical measurements, Instrument Systems offers the appropriate photometers such as the new DSP 200. These can be used for “on the fly” measurements, i.e. while the goniophotometer is in motion. The measurements are analyzed by our extensive SpecWin Pro spectral software.
From colorimetric spatial radiation properties to luminous flux integration
Depending on the specific measurement task, the relevant guidelines recommend use of a goniometer with a photometer or spectroradiometer. For both variants Instrument Systems offers instruments with the highest degree of measurement accuracy.
Like the LGS 350, the LGS 650 has a universal sample holder for a wide range of measurement tasks on medium-sized LED modules and luminaires. The many possible applications range from checking compliance with standards to energy efficiency classification.
Technical data and specifications
|Travel range C-axis||-70° to +250°, safeguarded by limit switches|
|Travel range γ-axis||±160°, safeguarded by limit switches|
|Resolution of angle encoder||0.01°|
|Reproducibility C-axis||≤ 0.1° (under max. sample load)|
|Reproducibility γ-axis||≤ 0.05° (under max. sample load)|
|Dimensions (H x W x D); weight||1732 x 502 x 727 mm3; 101 kg|
|Max. sample size/weight||670 mm / 10 kg|