• What is SCI and SCE?

    When we get a spectrophotometer, we will notice that the technical parameters of the product are marked as optical geometry: reflectanceSCI/SCE and transmittanceSCI/SCE. For example, the 3nh grating sp...

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  • Human Eyes to Distinguish Colors

    The color difference unit, NBS, is derived from the unit of color difference formula which is established by Judd-Hunter. In 1939, the American Bureau of Standards adopts this color difference formula ...

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  • The Color of Objects

    There are three major elements to perceive color: light, object and observer. Any change of these three elements will influence the observers color perception. When the light source and the observer do...

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  • CIE Standard Observers

    In the visual observing situation, the observer is the human eye that receives the light reflected from or transmitted through an object, and the brain which perceives the vision. The visual observing ...

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