Definition of Micrometer head. Meaning of Micrometer head. Synonyms of Micrometer head

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Definition of Micrometer head

Micrometer head
Micrometer Mi*crom"e*ter, n. [Micro- + -meter: cf. F. microm[`e]tre.] An instrument, used with a telescope or microscope, for measuring minute distances, or the apparent diameters of objects which subtend minute angles. The measurement given directly is that of the image of the object formed at the focus of the object glass. Circular, or 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. 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 object glass, it is called a divided-object-glass micrometer, and when the instrument is large and equatorially mounted, it is known as a heliometer. Double refraction micrometer, a species of double image micrometer, in which the two images are formed by the double refraction of rock crystal. Filar, or Bifilar, micrometer. See under Bifilar. Micrometer caliper or gauge (Mech.), a caliper or gauge with a micrometer screw, for measuring dimensions with great accuracy. Micrometer head, the head of a micrometer screw. Micrometer microscope, a compound microscope combined with a filar micrometer, used chiefly for reading and subdividing the divisions of large astronomical and geodetical instruments. Micrometer screw, a screw with a graduated head used in some forms of micrometers. Position micrometer. See under Position. Scale, or 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.

Meaning of Micrometer head from wikipedia

- A micrometer, sometimes known as a micrometer **** gauge (MSG), is a device incorporating a calibrated **** for accurate measurement of the size of...
- by the International Bureau of Weights and Measures; SI symbol: μm) or micrometer (American English), also commonly known by the non-SI term micron, is...
- like an instrument of torture". Placed on and around the head and face, the beauty micrometer uses flexible metal strips which align with a person's facial...
- two objects (such as in focusing a microscope, moving the anvils of a micrometer, or positioning optics). A differential **** uses a spindle with two...
- term "caliper" is often used in contradistinction to micrometer, even though outside micrometers are technically a form of caliper. In this usage, caliper...
- measured with a caliper or micrometer. To accurately detect the maximal distance between the two halves of the gauge head, move the head of the gauge around...
- that enabled the industrial revolution. They are key components of micrometers and lathes. There are three steps in manufacturing a ****: heading,...
- canals. Watt called his instrument a micrometer, a term now used with a different meaning in engineering (the micrometer **** gauge). It consisted of two...
- units Inch of mercury Outline of the metric system Pascal (unit) Pressure head Pressure Devices similar to the modern barometer, using water instead of...
- less than 1 mm. The term can also be used for robots capable of handling micrometer size components. Microbots were born thanks to the appearance of the microcontroller...