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Dispersion = Abbe Number or Constringency Value and Nu Value

- Point -  Dispersion is categorized by Abbe Number or as it is also known by Constringency Value or Nu Value. - Point Word- Dispersion Abbe Number Constringency Value Nu Value - Explanation -  Dispersion refers to the state in which light is scattered or spread out. It refers to the separation of the constituent colors of light, like a rainbow.  Abbe Number is an optical property that describes how much a transparent material scatters light. It is a measure of chromatic dispersion. A higher Abbe Number indicates less dispersion and less chromatic aberration.

Photochromic lenses are temperature dependent


- Point -

 Photochromic lenses are temperature dependent

 Hotter = Less Reaction

 Cooler = More Reaction



- Point Word-

  • Temperature dependent
  • Hotter = Less Reaction

  • Cooler = More Reaction



- Explanation -

There are many factors that affect the color change of a photochromic lens. It varies depending on temperature, UV exposure, lens life, and the chemical composition of the lens type.   In the cold winter, the color darkens and then fades again, but the reaction time is slow, but the concentration is darker (darker). In the summer, the reaction time is fast, but the concentration is light.

 There are many factors that affect the color change of a photochromic lens. It varies depending on temperature, UV exposure, lens life, and the chemical composition of the lens type. 

In the cold winter, the color darkens and then fades again, but the reaction time is slow, but the concentration is darker (darker). In the summer, the reaction time is fast, but the concentration is light.






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