lgs 350 goniophotometers

Built for Mid-sized SSL Light Source and LED Modules.

LGS 350 goniophotometer is built for mid-sized SSL light sources and LED modules for the analysis of angle-dependent spatial radiation properties. The test specimen is operated in a horizontal burning position and measurements can be taken at an angular range of ±160° in the gamma axis. The angular resolution of 0.01° means that very fine measuring grids can be recorded with a high level of accuracy and reproducibility. The LGS 350 is compliant with all the relevant specifications in conformity with CIE, DIN and IES standards.

A universal sample holder for mid-size LED modules and lamps, and a lamp holder for standard fittings of the type E10, E27, E40, etc. are supplied. Sample holders for TEC test adapters of the LED-850 and LED-870 series are available to plug and go. The test adapters facilitate the analyis of thermal properties of single LEDs, LED arrays and modules using minimum resources. The Peltier elements integrated in the test adapters permit adjustment over a wide temperature range from +5°C to +85°C.

The LGS 350 is compatible with all spectroradiometers supplied by Instrument Systems. The CCD array spectrometers in the CAS series are ideal because they feature a very large dynamic measuring range and very short measuring times. The use of a spectroradiometer offers the unique advantage that photometric, radiometric and colorimetric quantities can be obtained from the measured spectral data. Specifically for SSL lamps and LED modules, measurement accuracy is superior to filter-based photometers and colorimeters.

LGS 350 Goniophotometer

  • 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


LGS 350 Goniophotometer

ModelLGS 350-100 GoniophotometerLGS 350-110 Goniophotometer
Equipment setupStable base with integrated LGS ControllerBenchtop version with LGS Controller in a separate 19″ rack
10″ module slots14 U in height; 10 U occupied, 4 U free9 U in height; fully occupied, optionally more
Height (mm)1432740
Width (mm)500500
Depth (mm)650650
Weightapprox. 95kgapprox. 60 kg
Height of optical axis1372 mm ±5mm (adjustable)680 mm ±5mm (adjustable)
CIE goniometer typeType C with horizontal optical axis
DriverStepper motors
Angular range C axis±160° with end switches, -10° ~ 190° used 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 1 °/s to 18 °/s
Clear width C axis – swivel arm370 mm
Alignment laserIntegrated in the centre of rotation of the C axis. 1 mW. Laser class 2
Machine safteyEmergency 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 – M5 or T-bolts M6; also 2 tapped threads M6 x 12 (inside dimension 80 mm)
Maximum sample size700 x 140 mm or 640 x 230 mm or 500 x 500 mm (in each case for symmetrical mounting)
Maximum sample mass8 kg 
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 control
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 rating720W

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