Light distribution measurement system


The emission of devices like organic LEDs or other light sources varies strongly with the viewing angle. For proper characterization of such samples it is therefore necessary to measure brightness, chromaticity and the emission spectrum for different detection angles. Hamamatsus C9920-11 Light distribution characteristics measurement system meets these needs by using a rotating stage as sample mount and a highly sensitive detector.


Type number C9920-11
Rotating stage Minimum angle setting 1°
Light distribution measurement range 0 ° to +80 °, -80 ° to +80 °
Minimum step setting 1 °
Angle resolution 0.1 ° or less
Detector BT-CCD
Device cooling temperature -15 ℃
Number of photosensitive device channels 1024 ch
Wavelength measurement range

200 nm to 950 nm (for spectrum display range)

380 nm to 780 nm (for color measurement and luminous flux calculation range)

Fiber length 1.5 m
Measurement spot size < 200 μm (at 0° on front)
Brightness measurement range 10 cd/m2 to 10 000 cd/m2 (in white light)

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