LEDGON - Goniophotometer for determining spatial radiation patterns
The LEDGON goniophotometer from Instrument Systems determines the spatial radiation pattern of LEDs and small LED modules. Measurement is made over the whole forward hemisphere of an emitting LED. A high angle resolution of 0.1° means exact measurements even for narrow emission angle LEDs. In combination with the CAS 140CT spectroradiometer, additional spectral parameters, such as the angle dependence of color coordinates or color temperature, can also be measured. White LEDs, for example, exhibit a significant angle dependence of the color temperature.
Exact measurements of luminous flux and total radiant power
The LEDGON goniophotometer can also be used for accurate determination of luminous flux and total radiant power. The measurement errors typical of integrating spheres (due to their geometry) are avoided. Instrument Systems has developed an appropriate add-on for the SpecWin Pro software that fully automates the measurement process.
Specifications:
LEDGON-100 - goniophotometer | |
|---|---|
Angle range: | theta axis: approx. +/- 100° ; phi axis: 360° |
Angle accuracy: | theta axis: 0.1° ; phi axis: 1° |
LEDGON-130 - sample table | |
Clamping range | 2 x 15 mm |
Max. test size | 112 x 112 x 48 mm (W x L x H) |
Max. test weight | 700g |
Power supply | 10 x 0.1mm² max. 1A; 2x 0.75 mm² max. 6A |
LEDGON-131 xy translation stage | |
Linear travel | 49 mm per axis |
Max. test size | 64 x 85 x 25 mm (W x L x H) |
Ordering information:
Model | Model description |
|---|---|
LEDGON-100 | goniophotometer for LEDs and small LED modules; lightproof configuration with optical rail (without optical probe); includes stepper motor controller |
LEDGON-105 | slit on side of LEDGON for fiber feed-through |
LEDGON-120 | measurement head with diffuser (1cm² area); including OFG-414 fiber bundle and PLG-410 fiber connector adapter; spectral range 380 - 1600 nm |
LEDGON-121 | measurement head with diffuser (1cm² area); incl. OFG-424 quartz glass fiber bundle and PLG-420 fiber connector adapter; spectral range 190 - 1350 nm |
LEDGON-124 | rail carrier for mounting LED25-100 integrating sphere in LEDGON |
LEDGON-125 | complete measurement head comprising ISP25 integrating sphere with 1cm² entrance aperture, rail carrier, OFG-424 and PLG-420; spectral range 220 - 1350 nm |
LEDGON-130 | sample table for LED modules and mini-displays |
LEDGON-131 | XY translation stage for LEDGON-130 sample table |
LEDGON-133 | conversion to longer translation stage of phi-theta-unit found in older LEDGON systems (required for option LEDGON-130/13) |
LEDGON-135 | adjustment laser for optical rail in LEDGON |