Goniophotometric measurement system

Goniophotometric measurement system

Products > Light measurement > Goniophotometric measurement system > GP series

GP series

The display technology required in the display market is becoming more and more advanced. In line with this, the GP series measures the goniophotometric characteristics of large displays, Micro-LEDs, and OLEDs up to 2,400mm. It can handle a wide range of lighting fixtures from room lighting to floodlights and is customizable to meet your multi-purpose needs.

  • Up to 2,400mm of LED lightings can be measured

  • Compatible with Micro-LED, OLED and large display's goniophotometric measurement

  • By automatically controlling a biaxial goniometer to measure spectral distribution at every angle, spectral total radiant flux, total luminous flux, chromaticity, color temperature, etc. can be obtained

  • The newly adopted detector has a wide dynamic range

  • Compliant with IESNA LM-75 and CIE121

  • Optic type B and C can be chosen at the same time(in case of GP-2000)
  • Spectral radiant flux can be calculated even in UV - NIR light area
*Opticstype Ctype Ctype B, type C
Optical path length< 500mm500 ~ 1,500mm1,500 ~ 12,000mm
Measurable sampleLED chipMicro-LED, Mini-LED panelgeneral lighting
incl. fluorescent tube
Detectorarray spectrometer
Wavelength**360 ~ 830nm

*two-axis goniometer

**wavelength for the detector can be adjustable

Types of the coordinate system in light distribution measurement(JIS C 8105-5)

Vertical angleHorizontal angleIESNA LM-75
-90° ≦ α ≦ 90°
-180° ≦ β ≦ 180°
type B
0° ≦ θ ≦ 180°
0° ≦ φ ≦ 360°
type C

Measurement images of Type B and C

Measurement items
  • Angular distribution(light distribution)

  • Spectral radiant flux(spectrum)

  • Chromaticity(u,v) 〔CIE 1960UCS〕

  • Spectral radiant intensity(spectrum)

  • Chromaticity(u’,v’) 〔CIE 1976UCS〕

  • Chromaticity(x,y) 〔JIS Z 8724〕

  • Dominant wavelength and Excitation purity 〔JIS Z 8701:1999〕

  • Correlated color temperature and Duv 〔JIS Z 8725〕

  • Color rendering index(Ra, R1 ~ R15) 〔JIS Z 8726〕

 System configuration 

System configurations of Type B and C

6F, 41, Seongnam-daero 925beon-gil, Bundang-gu, Seongnam-si, Gyeonggi-do, 13496, Republic of Korea

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