micrometer : Idioms & Phrases

Index

Bifilar micrometer (often called a bifilar

  • ), an instrument form measuring minute distances or angles by means of two very minute threads (usually spider lines), one of which, at least, is movable; more commonly called a filar micrometer.
Webster 1913

Circular, ∨ Ring, micrometer

  • a metallic ring fixed in the focus of the object glass of a telescope, and used to determine differences of right ascension and declination between stars by observations of the times at which the stars cross the inner or outer periphery of the ring.
Webster 1913

Cobweb micrometer

  • a micrometer in which threads of cobwed are substituted for wires.
Webster 1913

Double image micrometer

  • a micrometer in which two images of an object are formed in the field, usually by the two halves of a bisected lens which are movable along their line of section by a screw, and distances are determined by the number of screw revolutions necessary to bring the points to be measured into optical coincidence. When the two images are formed by a bisected objects glass, it is called a divided-object-glass micrometer, and when the instrument is large and equatorially mounted, it is known as a heliometer.
Webster 1913

Double refraction micrometer

  • a species of double image micrometer, in which the two images are formed by the double refraction of rock crystal.
Webster 1913

Filar, ∨ Bifilar, micrometer

  • . See under Bifilar.
Webster 1913

micrometer caliper

  • noun caliper for measuring small distances
    micrometer caliper; micrometer.
WordNet

Micrometer caliper ∨ gauge

  • (Mech.), a caliper or gauge with a micrometer screw, for measuring dimensions with great accuracy.
Webster 1913

micrometer gauge

  • noun caliper for measuring small distances
    micrometer caliper; micrometer.
WordNet

Micrometer head

  • the head of a micrometer screw.
Webster 1913

Micrometer microscope

  • a compound microscope combined with a filar micrometer, used chiefly for reading and subdividing the divisions of large astronomical and geodetical instruments.
Webster 1913

Micrometer screw

  • a screw with a graduated head used in some forms of micrometers.
Webster 1913

Position micrometer

  • a micrometer applied to the tube of an astronomical telescope for measuring angles of position in the field of view.
Webster 1913

Reticulated micrometer

  • a micrometer for an optical instrument, consisting of a reticule in the focus of an eyepiece.
Webster 1913

Ring micrometer

  • . (Astron.) See Circular micrometer, under Micrometer.
Webster 1913

Scale, ∨ Linear, micrometer

  • a minute and very delicately graduated scale of equal parts used in the field of a telescope or microscope, for measuring distances by direct comparison.
Webster 1913

Stage micrometer

  • a graduated device applied to the stage of a microscope for measuring the size of an object.
Webster 1913

vernier micrometer

  • noun a caliper with a vernier scale for very fine measurements
    vernier caliper.
WordNet

Wire micrometer

  • a micrometer having spider lines, or fine wires, across the field of the instrument.
Webster 1913