Testing Instrument
LMT GO-V 1920
- Simple reconfiguration of GO-V 1920 for performance of absolute flux measurements
- ± 180° vertical and ± 170° horizontal rotation of photometer head around the test object (4π orientation)
- Light sources are not moved during measurement
- Maximum diameter of light source: 1.2 m
- Direct measurement of total and zonal luminous flux of lamps and luminaires
- Calibration of standard lamps required for luminaire measurements with a goniophotometer or measurements to be conducted in an integrating sphere
Flicker Measurement LMT OFM
- LMT’s measurement system for visual aspects of temporal lighting artefacts is based on the outstanding LMT flash measurement technology
- Very fast photometric signal acquisition (0,5 MHz over-sampling) delivers the data base for optical flicker analysis with a final bandwidth of 10 kHz and an upper frequency limit of 5 kHz
- Firmware for online evaluation of Flicker Index and Percent Flicker
- Optional standalone software application “SoLiT Flicker” Report with raw data of 10 fundamental modulation periods, Flicker Index (= deviation from average), Percent Flicker (= modulation depth), FFT determination of modulation frequency (resolution 0.1Hz), Contour plot of acceptability ratings acc.to Bullough et al (Lighting Res. Technol. 2012; 44:477–483)
- Results acc. CIE TC1-83 after CIE publication : Stroboscopic Effect Visibility Measure (SVM), Example Ghosting Visibility Measure, Short-term flicker severity
