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  2. NARS Cosmetics - Wikipedia

    en.wikipedia.org/wiki/NARS_Cosmetics

    NARS store, King's Road, London, 2022. NARS Cosmetics is a French cosmetics and skin care company founded by make-up artist and photographer François Nars in 1994. The cosmetics line began with twelve lipsticks sold at Barneys New York. Since then, NARS has created various multi-use beauty products and is now a subsidiary of Shiseido.

  3. Sunscreen - Wikipedia

    en.wikipedia.org/wiki/Sunscreen

    The sun protection factor (SPF rating, introduced in 1974) is a measure of the fraction of sunburn-producing UV rays that reach the skin. For example, "SPF 15" means that 1 ⁄ 15 of the burning radiation will reach the skin, assuming sunscreen is applied evenly at a thick dosage of 2 milligrams per square centimeter [65] (mg/cm 2). It is ...

  4. Optical coating - Wikipedia

    en.wikipedia.org/wiki/Optical_coating

    For example, the dichroic prism assembly used in some cameras requires two dielectric coatings, one long-wavelength pass filter reflecting light below 500 nm (to separate the blue component of the light), and one short-pass filter to reflect red light, above 600 nm wavelength. The remaining transmitted light is the green component.

  5. Fresnel equations - Wikipedia

    en.wikipedia.org/wiki/Fresnel_equations

    Four weeks before he presented his completed theory of total internal reflection and the rhomb, Fresnel submitted a memoir [30] in which he introduced the needed terms linear polarization, circular polarization, and elliptical polarization, [31] and in which he explained optical rotation as a species of birefringence: linearly-polarized light ...

  6. Diffuse reflectance spectroscopy - Wikipedia

    en.wikipedia.org/wiki/Diffuse_reflectance...

    Diffuse reflectance spectroscopy, or diffuse reflection spectroscopy, is a subset of absorption spectroscopy.It is sometimes called remission spectroscopy.Remission is the reflection or back-scattering of light by a material, while transmission is the passage of light through a material.

  7. Oren–Nayar reflectance model - Wikipedia

    en.wikipedia.org/wiki/Oren–Nayar_reflectance_model

    This model for diffuse reflection was proposed by Johann Heinrich Lambert in 1760 and has been perhaps the most widely used reflectance model in computer vision and graphics. For a large number of real-world surfaces, such as concrete, plaster, sand, etc., however, the Lambertian model is an inadequate approximation of the diffuse component.

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