Goniophotometer
Photoglobe 4FASC
Photoglobe 4FASC is the far-field goniophotometer that, for the duration of the photometric measurement, holds the sample under test fixed, in its operating position, whatever it may be.
The device under test (DUT) is any type of luminaire or light source.
WHY TO CHOOSE PHOTOGLOBE 4FASC
- installation and use within a small room
- rapidity of measurement
- fixed luminaire position during photometric measurement
- measurement of luminaires or light sources in their operating position, whatever it may be
- measurement of luminaires weighing up to 70 kg
- measurement of luminaires with a maximum size of 2.0 m x 2.0 m
possibility of luminaire measurement in the design and prototyping phase - compared to instruments with only one detector, the large number of Photoglobe 4FASC detectors makes it very easy to detect malfunctions
- L-class detectors
- PTB traceability for illuminance
- METAS traceability for chromaticity coordinates and CCT
- standard resolution of 1° on Gamma angles
CARRY OUT
- absolute measurements
- relative measurements
- flux measurements for light sources (lm)
- evaluation of all the colorimetric parameters according to CIE and IES TM-30-15 standards, along a specific direction or as spatially averaged values
CHECK
- luminaire or light source color uniformity
- color uniformity between luminaires by means of the MacAdam Ellipse
- stabilization of light sources
EXPORT
- EULUMDAT format (.ldt)
- IESNA format (.ies)
- .cvs format – colorimetric data
RETURN
- Spatial distribution of luminous intensity
- Luminous flux (lm)
- Spectral irradiance (µW* cm-2 * nm-1)
- Tristimulus values X, Y, Z
- X1 and X2 components of X
- Chromaticity coordinates x, y (CIE 1931 colour space)
- Chromaticity coordinates u’, v’ (CIE 1976 colour space)
- Correlated colour temperature (CCT)
- Chromatic Difference (DC)
- Colour Rendering Index (CRI)
- Colour components (R1, R2, … , R14)
- Fidelity Index (according to IES TM 30-15)
- Gamut Area Index (GAI) (in accordance with IES TM 30-15)
POST-PROCESSING SOFTWARE
Measurement data are processed by a powerful post-processing software.
The software generates a .PDF measurement report containing, in addition to the above listed data, the following:
- efficacy (lm/W)
- calculation of the beam of light of luminaires
- polar diagram
- Cartesian diagram
- representation of chromaticity coordinates x, y in CIE 1931 diagram
- representation of chromaticity coordinates u’, v’ in CIE 1976 diagram
- graphical representation of color components
- graphical representation of the Gamut Area
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