LGS 350

Compact, space-saving goniophotometer

Loading
Loading Loading

Products / Goniophotometers for LED / SSL / LGS 350

Spatial characterization of medium-sized SSL light sources and LEDs

The LGS 350 goniophotometer or goniospectroradiometer was developed by Instrument Systems for determining the angle-dependent spatial radiation properties of small to medium-sized SSL luminaires and LED modules. The light source is operated in a horizontal burning position and can be measured in an angle range of ±160° to the mechanical axis.

Together with an Instrument Systems spectroradiometer, all spectral parameters such as color coordinates, color temperature and even color rendering index are determined angle-dependent. Photometer DSP 200 can also be used for fast “on the fly” measurement of C-levels.

The instrument is suitable for samples with a diameter of up to 700 mm and a weight of 8 kg.

LGS 350 – Highlights:

  • Type C goniophotometer for test samples with a diameter of up to 700 mm and a weight of 8 kg
  • Precise determination of luminous intensity distribution and luminous flux
  • Angle-resolved examination of spectral and colorimetric quantities
  • Data export in IES and EULUMDAT format
  • Easy and intuitive control of the measurement process, as well as power supply and electric measurement of the sample
  • Configurable switch-on and stabilization routines for the light source in repetitive measuring tasks
  • Extensive and adaptable measurement logs and reporting functions

Versatile sample holder

Thanks to its universal sample holder, the LGS 350 is suitable for a wide range of measurement tasks on medium-sized LED modules and luminaires. In addition, it has a sample holder for LED-850/LED-870 TEC adapter and standard lamp base E27.

The following versions of the LGS 350 are available for various applications in the lightlab:

  • Goniometer with a sturdy base and integral LGS controller. It is compact and has a small footprint, offering extremely high mechanical stability.
  • Goniometer as a table version with a separate 19” rack for the LGS controller. This instrument version is mobile and flexible in use.

Examples of applications

LGS 350 – Technical data

Specification

Description

Travel range C-axis±160°, safeguarded by limit switches
Travel range γ-axis±160°, safeguarded by limit switches
Resolution of the angle encoder0.01°
Reproducibility of C-axis≤ 0.1° (under max. sample load)
Reproducibility of γ-axis    ≤ 0.05° (under max. sample load)
Dimensions (H x W x D); weight   1432 x 500 x 650 mm; 95 kg
Max. sample size/weight  700 x 140 mm² or 640 x 230 mm² or 500 x 500 mm² (jeweils zur symmetrischen Montage) / 8 kg

The LGS 350 consists of the goniophotometer with a plate for securing the sample and the LGS controller. In addition to the stepper motor control, the latter also serves as an angle display and, when using a photometer, as a display unit for readings in candela or lux.  

Video