Definition of Position micrometer. Meaning of Position micrometer. Synonyms of Position micrometer
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Definition of Position micrometer
Position micrometerMicrometer Mi*crom"e*ter, n. [Micro- + -meter: cf. F.
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
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
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 Position micrometer from wikipedia
- A filar micrometer
is a specialized eyepiece
used in astronomical telescopes
measurements, in microscopes
- A micrometer
, sometimes known
as a micrometer
**** gauge, is a device incorporating
used for accurate measurement
- term "caliper" is often
used in contradistinction
", even though outside micrometers
a form of caliper. In this usage, "caliper"...
(the "zero" position where
the split elements
element). The micrometer
is then adjusted
so that diametrically...
- particulate matter
(PM10 and PM2.5, i.e. particles smaller
than 10 or 2.5 micrometers
, respectively). WHO Global Ambient
Air Quality Database
mirror, a sighting
telescope, sun shades, a graduated scale
and a micrometer
measurements. The scale
must be graduated
(such as in focusing
a microscope, moving
of a micrometer
, or positioning
optics). A differential
**** uses a spindle
with two **** threads...
- wavelength scale
on the order
of a half a micrometer
. Scattering centers
(or particles) as small
as one micrometer
have been observed directly
in the light...
- the 28-inch was a survey
in 1912, measured
with a bifilar position micrometer
. In March
1918 the 28 inch took observations
of Encke's Comet
- them. In the event
of a collision
the arms would
lock into their current position
, as if the air around
the p****engers had abruptly frozen
solid. The result...
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