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  2. Magnification - Wikipedia

    en.wikipedia.org/wiki/Magnification

    Stepwise magnification by 6% per frame into a 39-megapixel image. In the final frame, at about 170x, an image of a bystander is seen reflected in the man's cornea. Magnification is the process of enlarging the apparent size, not physical size, of something. This enlargement is quantified by a size ratio called optical magnification.

  3. Eyepiece - Wikipedia

    en.wikipedia.org/wiki/Eyepiece

    For a compound microscope the corresponding formula is ... is the magnification. The formula is accurate to 4% or better up to 40° apparent field of view, and has a ...

  4. Optical microscope - Wikipedia

    en.wikipedia.org/wiki/Optical_microscope

    There are two basic types of optical microscopes: simple microscopes and compound microscopes. A simple microscope uses the optical power of a single lens or group of lenses for magnification. A compound microscope uses a system of lenses (one set enlarging the image produced by another) to achieve a much higher magnification of an object.

  5. Bright-field microscopy - Wikipedia

    en.wikipedia.org/wiki/Bright-field_microscopy

    The practical limit to magnification with a light microscope is around 1300×. Higher magnifications are possible, but it becomes increasingly difficult to maintain image clarity as the magnification increases. [3] Bright-field microscopes have low apparent optical resolution due to the blur of out-of-focus material;

  6. Microscopy - Wikipedia

    en.wikipedia.org/wiki/Microscopy

    Antonie van Leeuwenhoek (1632–1723). The field of microscopy (optical microscopy) dates back to at least the 17th-century.Earlier microscopes, single lens magnifying glasses with limited magnification, date at least as far back as the wide spread use of lenses in eyeglasses in the 13th century [2] but more advanced compound microscopes first appeared in Europe around 1620 [3] [4] The ...

  7. Numerical aperture - Wikipedia

    en.wikipedia.org/wiki/Numerical_aperture

    [3] [5] The magnification here is typically negative, and the pupil magnification is most often assumed to be 1 — as Allen R. Greenleaf explains, "Illuminance varies inversely as the square of the distance between the exit pupil of the lens and the position of the plate or film. Because the position of the exit pupil usually is unknown to the ...

  8. Microscopic scale - Wikipedia

    en.wikipedia.org/wiki/Microscopic_scale

    Compound light microscopes have a short focal length objective lens which produces a real image which is examined using a longer focal length eyepiece. 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.

  9. Ocular micrometer - Wikipedia

    en.wikipedia.org/wiki/Ocular_micrometer

    Ocular micrometer Micrometer Eyepiece. An ocular micrometer or eyepiece micrometer is a glass disk, engraved with a ruled scale, that fits in an eyepiece of a microscope, [1] [2] which is used to measure the size of microscopic objects through magnification under a microscope.

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