Products > Light measurement > Total radiant flux · Total luminous flux > 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.
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
Optics
| *Size of integrating hemisphere | φ 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 box | Flux 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
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〕
HM series
FM series
6F, 41, Seongnam-daero 925beon-gil, Bundang-gu, Seongnam-si, Gyeonggi-do, 13496, Republic of Korea
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