lgs 650 goniophotometers

Goniophotometer Suitable For Mid-To-Large Sized SSL Sources And LED Modules

LGS 650 goniophotometer is built and designed for the analysis of angle-dependent spatial radiation properties from mid- to large-sized SSL sources and LED modules. The LGS 650 is part of the established LGS family and perfect for samples up to max. 1300 mm diameter and 10 kg weight. 

The LGS 650 is compatible with all spectroradiometers supplied by Instrument Systems. The CCD array spectrometers of the CAS series are ideal because they feature a very large dynamic measuring range and very short measuring times. The measurement system is supplemented with optical probes from the EOP series. They are calibrated together with the spectrometer in the ISO 17025 certified laboratories of Instrument Systems. The LGS 650 is compliant with all relevant specifications in conformity with CIE, DIN and IES standards.

Combined with a spectroradiometer from Instrument Systems, all spectral quantities such as color coordinates, color temperature and even color rendering index can be determined as a function of angle. C-plane measurements can also be carried out very quickly “on-the-fly” using the DSP 10 or DSP 200 Photometer. This provides an overview of the spatial light distribution for the test specimen very quickly. A comprehensive software package facilitates easy evaluation and reporting of the measured data. The measurement results can also be exported in standard file formats like IES and EULUMDAT


LGS 650 Goniophotometer

  • Type C goniophotometer with horizontal optical axis
  • For samples up to max. 1300 mm diameter and 10 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

LGS 650 Goniophotometer

ModelLGS 650 Goniophotometer
Equipment setupStable base with integrated LGS Controller
10″ module slots14 U in height; 10 U occupied, 4 U free
Height (mm)1732
Width (mm)502
Depth (mm)727
Weightapprox. 101kg
Height of optical axis1672 mm ±5mm (adjustable)
CIE goniometer typeType C with horizontal optical axis
DriverStepper motors
Angular range C axis-70° to + 250° with limit switches (0° to 180° used for C-plane measurements)
Angular range ꝩ axis±160° with end switches
Angular resolution0.01°
Reproducibility C axis≤ 0.1° (at max. sample load)
Reproducibility  ꝩ axis≤ 0.05° (at max. sample load)
Angular speed C axis16 speeds selectable from 2.5 °/s to 36 °/s
Angular speed  ꝩ axis16 speeds selectable from 2.1 °/s to 34 °/s
Clear width C axis – swivel arm670 mm%
Alignment laserIntegrated in the centre of rotation of the C axis. 1 mW. Laser class 2
Machine safetyEmergency stop switch on the goniometer and the LGS Controller, safety strips on the swivel arm
Sample table
Mounting plate100 x 100 mm with 2 x 2 grooves size 6 (inside dimension 50mm) for slot nuts size 6 – M4 or T-bolts M6; also 2 tapped threads M6 x 12 (inside dimension 80 mm)
Maximum sample sizeMax. extension is 670 mm measured from the centre point of the mounting plate. E.g 1320 x 100 mm or 920 x 920 mm (in each case for symmetrical mounting)
Maximum sample mass10 kg (near symmetrical weight distribution)
Electrical sample connection2 safety banana sockets for specimen power supply; 2 safety banana socket for probe cable; 1 protective conductor; max. 300V, 10A.
LGS Controller
FunctionsDriving the stepper motors for the goniometer; display of the angle positions; optional display of measured values for the DSP 10 photometer
InterfacesRS-232C for connecting a PC; CAN bus for DSP 10 photometer and RecoCAN remote control 
Power supply230 VAC (optional 115VAC)
Power rating120W
LGS Motion Driver
FunctionsPower electronic for goniometer, main switch for goniometerpower suppoy, start buttin to unlock gears, emergency stop switch, Laser on/off switch, connection to RecoCAN remote contro;
InterfacesCircular connector for stepper motors, CAN bus for LGS Controller, Sub-D for control signal of goniometer, power socket for power supply LGS Controller
Power supply230 VAC (optional 115VAC)
Power rating120W

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