Goniophotometric measurement system

Goniophotometric measurement system

Products > Light measurement > Goniophotometric measurement system > GP series

GP series

In the display market, the status of large displays and OLEDs is increasing. GP series evaluates goniophotometric characteristics for large displays and OLED 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 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 chipgeneral lighting modulegeneral lighting
incl. fluorescent tube
Detectorarray spectrometer
Wavelength**360 ~ 830nm

*two-axis goniometer

**wavelength for detector can be adjustable

Types of 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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