The e-value of an optical brightening agent refers to the extinction coefficient, which is a measure of how strongly the agent absorbs light at a specific wavelength. It is a crucial parameter in determining the effectiveness of the agent in enhancing the brightness of materials such as paper or fabrics. The higher the e-value, the more efficient the agent is at absorbing light and emitting fluorescence, resulting in a greater optical brightening effect.
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The e-value of an optical brightening agent refers to its extinction coefficient, which describes how strongly it absorbs light at a specific wavelength. It can be used to quantify the brightness enhancement effect of the optical brightening agent in a given application.
e-value of an optical brightening agent is the absorbance value obtained (in the UV region), when the absorbance of 1% solution is measured using a cuvette of 1 cm path length.
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Optical power refers to the ability of a lens or optical system to converge or diverge light. It is typically measured in diopters (D) and indicates the strength of the lens in focusing light onto the retina. Positive optical power converges light (useful for correcting hyperopia), while negative optical power diverges light (useful for correcting myopia).
Yes, Transitions Optical is owned by PPG Industries, a leading global supplier of paints, coatings, optical products, and specialty materials. Transitions Optical is known for its adaptive eyewear products that darken in response to sunlight and UV rays.
Flowers are like the smiles of nature, blooming and brightening the world around them.
"Optical", in this case, simply means that they work with light.
"Optical" means related to light, often to visible light. So, a system that works with light.