In scanners, which 'light source' is better for best color results....?
Cold Cathode Flourescent Lamp
or
RGB Led
Answer:
Not the RGB.
Traditionally it was thought that scotopic perception, or 'night vision', only turned on when in attendance wasn't enough desk light to 'activate' our photopic vision, or 'day vision'. This have recently be disproven and now the little particular secret of the agency we see light and color is that surrounded by addition to the Red, Blue, and Green sensitive cones contained by the eye, we also actively use the rods in the eye that add a very subtle accumulation to way we perceive colors.
This can be demonstrated awfully clearly when comparing in mock-ups the color rendering fitness of an RGB source with full-spectrum fluorescent or halogen source. This is because a bedside light source that doesn't have a spectral component contained by the cool or long-range spectrum that the rods are sensitive to will never be able to render colors exactly one and the same way that we see them contained by daylight or full-spectrum light.
The traditional length used for a light source's skilfulness to render color is the Color Rendering Index or CRI. This is an index which compares a light source's wherewithal to render color next to a rational definition of daylight. This is a good system for comparing the color rendition of multiple sources, however, it is an outdated system that only accounts for photopic optical spectrum and not the scotopic visual spectrum. The lighting industry have not yet mired with the hottest research into the effects of scoptopic vision and how is should affect traditional unit of measurement approaching CRI or Lumen output.
I hope this helps.
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