LGS 350 – Perfect for mid-sized SSL light sources and LED modules

The LGS 350 Goniophotometer / Goniospectroradiometer was developed for the analysis of angle-dependent spatial radiation properties from small to medium-sized SSL luminaires and LED modules. The test specimen is operated in a horizontal burning position and measurements can be taken at an angular range of ±160° in the gamma / theta axis.

Combined with a spectroradiometer from Instrument Systems, all spectral quantities such as color coordinates, color temperature and even color rendering index are determined as a function of angle. The Optronik DSP Photometer can also be used to carry out C-plane measurements very quickly “on the fly”.

The complete system

The LGS 350 comprises the goniometer with a sample plate for fixing the test specimen and the LGS Controller that drives the stepper motor and the angle display. If a photometer is used, the LGS Controller also displays the measured values in candela or lux.

The following versions of the LGS 350 are supplied:

• Goniometer with stable base and integrated LGS Controller. The structure is particularly space-saving and compact, as well as providing very high mechanical stability with the floor.
• Goniometer in benchtop version with separate 19” rack for the LGS Controller. This configuration is mobile and can be used flexibly.

Features

• Type C goniophotometer with horizontal optical axis
• For samples up to 700 mm diameter and 8 kg weight
• Accurate determination of the luminous intensity distribution and luminous flux
• Angular-resolved analysis of spectral and colorimetric quantities
• Data export in IES and EULUMDAT format

Technical specifications:

LGS 350 Goniophotometer
Goniometer
CIE goniometer type	Type C with horizontal optical axis
Driver	Stepper motors
Angular range C axis	± 160° with reset switches
Angular range Gamma axis	± 160° with reset switches
Resolution of the angle encoder	0,01°
Reproducibility C axis	≤ 0,1° (at max. sample load)
Reproducibility Gamma axis	≤ 0,05° (at max. sample load)
Angular speed C axis	16 speeds selectable from 2.5°/s to 36°/s
Angular speed Gamma axis	16 speeds selectable from 2.1°/s to 34°/s
Clear width C axis – swivel arm	370 mm
Sample table
Maximum sample size	700 x 140 mm² or 640 x 230 mm² or 500 x 500 mm² (in each case for symmetrical mounting)
Maximum sample mass	8 kg