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  2. Helium–neon laser - Wikipedia

    en.wikipedia.org/wiki/Helium–neon_laser

    The best-known and most widely used He-Ne laser operates at a center wavelength of 632.81646 nm (in air), 632.99138 nm (vac), and frequency 473.6122 THz, [1] in the red part of the visible spectrum. Because of the mode structure of the laser cavity, the instantaneous output of a laser can be shifted by up to 500 MHz in either direction from the ...

  3. List of laser types - Wikipedia

    en.wikipedia.org/wiki/List_of_laser_types

    416 nm, 530.9 nm, 568.2 nm, 647.1 nm, 676.4 nm, 752.5 nm, 799.3 nm Electrical discharge Scientific research, mixed with argon to create "white-light" lasers, light shows. Xenon ion laser: Many lines throughout visible spectrum extending into the UV and IR: Electrical discharge Scientific research. Nitrogen laser: 337.1 nm Electrical discharge

  4. Crustacyanin - Wikipedia

    en.wikipedia.org/wiki/Crustacyanin

    Crustacyanin is a carotenoprotein biological pigment found in the exoskeleton of lobsters and blue crabs and responsible for their blue colour. [1] β-Crustacyanin (β-CR), is composed of two stacked astaxanthin carotenoids that absorb at λ = 580–590 nm (2.10–2.14 eV). [2] α-crustacyanin (α-CR) is an assembly of eight β-CR protein dimers.

  5. Wratten number - Wikipedia

    en.wikipedia.org/wiki/Wratten_number

    blue tricolor: C5: Used for color separation. Complements #29 and #61 47A light blue: Stage Blue: By removing much light that is not blue, blue and purple objects show a broader range of colors. Used for medical applications that involve making dyes fluoresce 47B deep blue tricolor: Used for color separation.

  6. Spectral color - Wikipedia

    en.wikipedia.org/wiki/Spectral_color

    A rainbow is a decomposition of white light into all of the spectral colors. Laser beams are monochromatic light, thereby exhibiting spectral colors. A spectral color is a color that is evoked by monochromatic light, i.e. either a spectral line with a single wavelength or frequency of light in the visible spectrum, or a relatively narrow spectral band (e.g. lasers).

  7. Biological pigment - Wikipedia

    en.wikipedia.org/wiki/Biological_pigment

    In lobsters, there are various types of astaxanthin-protein complexes present. The first one is crustacyanin (max 632 nm), a slate-blue pigment found in the lobster's carapace. The second one is crustochrin (max 409), a yellow pigment which is found on the outer layer of the carapace.

  8. Template:Spectral colors simple table - Wikipedia

    en.wikipedia.org/wiki/Template:Spectral_colors...

    Pages for logged out editors ... blue. 450–485 620–670 ... will display the same table except that the British spelling "colour" is used instead of the American ...

  9. Blue laser - Wikipedia

    en.wikipedia.org/wiki/Blue_laser

    445–450 nm blue laser (middle) Prior to the 1960s and until the late 1990s, gas and argon-ion lasers were common and suffered from poor efficiencies (0.01%) and large sizes.