Color measurement involves determining the reflection spectrum of a sample and applying it to a standard illuminant. The amount oflight energy the sample reflects is manipulated and reduced to tristimulus values X, Y and Z. These values correspond to the physiological response of the three types of color receptors in the human eye. X, Y and Z values are combined into uniform colorspace values such as L*, a* and b*.
A USB4000 with a 25 μm slit and Grating #2 (350-1000 nm) works well for color analysis. For those using an integrating sphere as the sampling optic, we recommend an L4 Detector Collection Lens to improve sensitivity.
When taking reflective-color measurements, your data depends on sampling geometry. The QR400-7-VIS-NIR Reflection Probe provides illumination and detection from the same direction. If you use the probe at a 45°, it measures diffuse reflection. If you use the probe at a 90°, it measures specular reflection. The distance from the probe to the surface determines the sample size. An alternative is the ISP-REF Integrating Sphere, which provides 180° illumination and detection from flat surfaces for measuring specular and diffuse reflection.
Reflectivity is measured against a reference standard such as the WS-1 Diffuse Reflectance Standard. SpectraSuite Spectroscopy Operating Software calculates a variety of color-space values from the reflection spectra.
07072 서울시 동작구 신대방1가길 38 (신대방 719번지 동작상떼빌) 106동 209호 (주)원우시스템즈 TEL : 02-533-6720 FAX : 02-533-9614 Santevill 106-209, 38, Sindaebang1ga-gil, Dongjak, Seoul, 07072, South Korea
Copyright 2000-2023 Wonwoo Systems Co.,Ltd. All right reserved