Goniophotometric tester(far field)

GP series

Products > Automotive evaluation > Automotive lighting tester > GP series

GP series

GP series measure the angular distribution of luminous intensity to evaluate the goniophotometric characteristics.

#LMT, light distribution

  • Goniophotometric measurement for LED luminaries up to 2,400mm

  • Spectral distribution at each angle by controlling two-axis goniophotometer automatically to obtain total luminous flux with zonal spherical function

  • Goniophotometric measurement for large displays

  • Wide dynamic range with brand-new detector

  • Complying with IESNA LM-75 and CIE121

  • Both Type B and Type C are available

  • Goniophotometric measurement at both UV and NIR region(spectral radiant flux calculation available)

*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 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