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  2. Dichromatic symmetry - Wikipedia

    en.wikipedia.org/wiki/Dichromatic_symmetry

    There are no mirror reflection (m) operations for the dichromatic triangle, as there would be if all the smaller component triangles were coloured white. However, by introducing the anti-mirror reflection (m') operation the full dihedral D3 symmetry is restored. The six operations making up the dichromatic D3 (3m') point group are: identity (e)

  3. Interference filter - Wikipedia

    en.wikipedia.org/wiki/Interference_filter

    The color transmitted by the filter exhibits a blue shift with increasing angle of incidence, see Dielectric mirror. In a dichroic mirror or filter, instead of using an oil film to produce the interference, alternating layers of optical coatings with different refractive indices are built up upon a glass substrate. The interfaces between the ...

  4. Dichroism - Wikipedia

    en.wikipedia.org/wiki/Dichroism

    The original meaning of dichroic, from the Greek dikhroos, two-coloured, refers to any optical device which can split a beam of light into two beams with differing wavelengths.

  5. Dichromacy - Wikipedia

    en.wikipedia.org/wiki/Dichromacy

    A dichromatic color space can be defined by only two primary colors. When these primary colors are also the unique hues, then the color space contains the individuals entire gamut. In dichromacy, the unique hues can be evoked by exciting only a single cone at a time, e.g. monochromatic light near the extremes of the visible spectrum.

  6. Dielectric mirror - Wikipedia

    en.wikipedia.org/wiki/Dielectric_mirror

    Dielectric mirrors are very common in optics experiments, due to improved techniques that allow inexpensive manufacture of high-quality mirrors. Examples of their applications include laser cavity end mirrors, hot and cold mirrors , thin-film beamsplitters , high damage threshold mirrors, and the coatings on modern mirrorshades and some ...

  7. Dichromatic - Wikipedia

    en.wikipedia.org/wiki/Dichromatic

    Dichromatic may refer to: Dichromacy , a form of color-blindness in which only two light wavelengths are distinguished rather than the usual three Dichromatic, describing an optical device which splits light into two parts according to its wavelength: a form of dichroism

  8. Bob Gale wrote and produced all three “Back to the Future” movies with franchise co-creator Robert Zemeckis, but he’s not interested in reviving the time travel franchise for a fourth go-around.

  9. Optical filter - Wikipedia

    en.wikipedia.org/wiki/Optical_filter

    Some filters, like mirrors, interference filters, or metal meshes, reflect or scatter much of the non-transmitted light. The ( dimensionless ) Optical Density of a filter at a particular wavelength of light is defined as − log 10 ⁡ T {\displaystyle -\log _{10}T} where T is the (dimensionless) transmittance of the filter at that wavelength.