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  2. Confocal microscopy - Wikipedia

    en.wikipedia.org/wiki/Confocal_microscopy

    Fluorescence and confocal microscopes operating principle. Confocal microscopy, most frequently confocal laser scanning microscopy (CLSM) or laser scanning confocal microscopy (LSCM), is an optical imaging technique for increasing optical resolution and contrast of a micrograph by means of using a spatial pinhole to block out-of-focus light in image formation. [1]

  3. Length (phonetics) - Wikipedia

    en.wikipedia.org/wiki/Length_(phonetics)

    Also, tonal contour may reinforce the length, as in Estonian, where the over-long length is concomitant with a tonal variation resembling tonal stress marking. In transcription in the International Phonetic Alphabet , long vowels or consonants are notated with the length sign (ː Unicode U+02D0 MODIFIER LETTER TRIANGULAR COLON) after the letter.

  4. Objective (optics) - Wikipedia

    en.wikipedia.org/wiki/Objective_(optics)

    Two Leica oil immersion microscope objective lenses; left 100×, right 40×. The objective lens of a microscope is the one at the bottom near the sample. At its simplest, it is a very high-powered magnifying glass, with very short focal length. This is brought very close to the specimen being examined so that the light from the specimen comes ...

  5. Rayleigh length - Wikipedia

    en.wikipedia.org/wiki/Rayleigh_length

    Gaussian beam width () as a function of the axial distance .: beam waist; : confocal parameter; : Rayleigh length; : total angular spread In optics and especially laser science, the Rayleigh length or Rayleigh range, , is the distance along the propagation direction of a beam from the waist to the place where the area of the cross section is doubled. [1]

  6. Microscopic scale - Wikipedia

    en.wikipedia.org/wiki/Microscopic_scale

    The ratio of the focal length of the objective and the eyepiece, when mounted in a standard tube length, gives an approximate magnification of the system. Due to their design, compound microscopes have improved resolving power and contrast in comparison to simple microscopes, [11] and can be used to view the structure, shape and motility of a ...

  7. Gemination - Wikipedia

    en.wikipedia.org/wiki/Gemination

    In phonetics and phonology, gemination (/ ˌ dʒ ɛ m ɪ ˈ n eɪ ʃ ən / ⓘ; from Latin geminatio 'doubling', itself from gemini 'twins' [1]), or consonant lengthening, is an articulation of a consonant for a longer period of time than that of a singleton consonant. [2]