Total radiant flux measurement system

Total luminous flux measurement system

Products > Automotive evaluation > Automotive lighting tester > HM/FM series

HM/FM series

HM/FM series measures the total radiant flux of light source up to 2,400mm size. Otsuka’s original integrating hemisphere system enables more precise measurement removing self-absorption error and still achieves a wide dynamic range using a high-performance array spectrometer. HM/FM series can be customized for different sizes, making it an optimal solution for your application.

  • Accommodates Maximum 2,400mm fluorescent tube
  • IESNA LM79 and LM-80 compliant
  • Wide dynamic range thanks to high performance array spectrometer
  • Wide range of sphere diameter from φ250mm to φ3,000mm suitable to needs
  • L-I-V, pulse, temperature control(-40℃ to +200℃) measurement are available
  • PWM(Pulse Width Modulation) applicable

Temperature control-power control-detector control through software synchronization

HM series

  • Lighting direction is changeable, making the actual lighting position attainable

  • No self-absorption error because only the illuminant is located in the integrating hemisphere

  • Double sensitivity compared with a conventional integrating sphere

  • Best suitable for surface illuminant(2pi light source)

  • The fixture is located outside the hemisphere, making sample temperature control easy(compatible with a high-brightness light source)

  • Suitable for large lighting device since the shadow of the device itself can be minimally eliminated(device size up to one-third of hemisphere diameter)

FM series

  • Accommodates max. 2,400mm fluorescent tube

  • Self-absorption correction function



*Size of integrating hemisphereφ 250, φ 300, φ 500, φ 1,000, φ 1,650, φ 2,000, φ 3,000mm
Flux standard lamp< 5W, < 5V, approx. 50lm
Self absorption correction lamp< 5W, < 5V, approx. 50lm
Power supply of lamp± 0.1%, ± 2.0mA
Lamp switching boxFlux standard lamp and self absorption correction lamp are switched each other by ON/OFF with one lamp power supply  

*ask for other sizes

Array spectrometer

Wavelength range*360 ~ 1,100nm

*can be chosen from several models

Measurement items
  • Total luminous flux 〔JIS C 7801:2009 / JIS C 8152:2007〕

  • Total radiant flux(spectrum)

  • SDCM

  • Chromaticity(u, v) 〔CIE 1960UCS〕

  • Chromaticity(x, y) 〔JIS Z 8724:1997〕

  • Chromaticity(u', v') 〔CIE 1976UCS〕

  • Color Temperature & Duv 〔JIS Z 8725:1999〕

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

  • Color rendering index(Ra, R1 ~ R15) 〔JIS Z 8726:1990〕

 System configuration 

HM series

Configuration systems of HM/FM series

FM series

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

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