Luminous color measurement

14 Mar 2022

In this application note, JASCO introduces methods for evaluating luminous colors and color rendering by a JASCO spectrophotometer for the development of LED, Organic EL, and PDP displays. Moreover, a method for evaluating the colors of liquid crystal displays (LCD) using the same system is also introduced.

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V-780 UV-Visible/NIR Spectrophotometer
JASCO (USA)
The V-780 UV-Visible-Near Infrared (UV-Vis/NIR) spectrophotometer features a monochromator with automatically exchanged dual gratings: 1200 lines/mm for the UV/VIS region; 600 lines/mm for the NIR region. A PMT detector is provided for the UV-visible region and a high sensitivity InGaAs photodiode detector is employed for the NIR region. Both gratings and detectors are automatically exchanged within the user selectable 800 to 900 nm range.
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V-770 UV-Visible/NIR Spectrophotometer
JASCO (USA)
The V-770 UV-Visible-Near Infrared (UV-Vis/NIR) spectrophotometer features a monochromator with automatically exchanged dual gratings: 1200 lines/mm for the UV/VIS region; 300 lines/mm for the NIR region. A PMT detector is provided for the UV-visible region and a Peltier-cooled PbS detector is employed for the NIR region. Both gratings and detectors are automatically exchanged within the user selectable 800 to 900 nm range.
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V-750 UV-Vis Spectrophotometer
JASCO (USA)
The optical design employs ‘true double beam optics’ with a chopper providing timed sample, reference and dark current measurements.A high sensitivity PMT (photomultiplier tube) provides accurate and reproducible measurements of both low (and high) concentration samples. By controlling the high voltage applied to the PMT, the dynode feedback circuit allows a wider dynamic range. It also provides excellent sensitivity for diffuse reflectance or transmittance of solid and liquid samples using an integrating sphere. The spectral bandwidth can be set as narrow as 0.1 nm for high resolution measurements, such as gas and vapor phase spectroscopy. Special low stray light slit settings which optimize the light image on the monochromator provide increased linearity of up to 5 absorbance units. With a comprehensive range of sampling accessories, the V-750 is well suited to measurement of samples in the UV and visible regions, with temperature control for biological samples and a number of transmittance and reflectance accessories for materials analysis.
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V-760 UV-Vis Spectrophotometer
JASCO (USA)
The optical bench in the V-760 UV-visible spectrophotometer utilizes a double monochromator to provide exceptional resolution with extremely low stray light (0.00008%) to assure more precise measurement over the widest photometric range.The V-760 provides excellent sensitivity for diffuse reflectance or transmittance of solid and liquid samples using an integrating sphere. The spectral bandwidth can be set as narrow as 0.1 nm for high resolution measurements, such as gas and vapor phase spectroscopy. Extended photometric linearity up to 8 Abs enables measurement of highly absorbing samples and is also effective for measurements of optical material with transmission characteristics that approach 0 %T.
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V-730 UV-Vis Spectrophotometer
JASCO (USA)
User friendly features include the IQ Accessory function for automatic accessory recognition and IQ Start for immediate start of registered data collection applications when conducting routine measurements.Two graphical user interfaces are available including a newly redesigned intelligent remote module (iRM) with a color LCD touch screen or Spectra Manager II software, the latest version of JASCO's innovative, cross-platform spectroscopy software. Both of these control and analysis interfaces allow full system control and advanced data processing. Spectra Manager CFR is a 21 CFR part 11 compliant version of software and is available as an option.
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