Definition of Double refraction micrometer. Meaning of Double refraction micrometer. Synonyms of Double refraction micrometer
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Definition of Double refraction micrometer
Double refraction 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 Double refraction micrometer from wikipedia
- Great refractor refers
to a large telescope
with a lens, usually
the largest refractor
at an observatory
with an equatorial
mount. The preeminence
- A heliometer
(from Gr**** ἥλιος hḗlios "sun" and measure) is an instrument originally designed
of the sun's diameter
(British English) or leveling
(American English; see spelling
differences) is a branch
of surveying, the object
is to Find the elevation...
- Optical mineralogy
is the study
by measuring their optical
properties. Most commonly, rock and mineral samples
- Immersion lithography
is a photolithography resolution enhancement technique
for manufacturing integrated circuits
(ICs) that replaces
- Whitin Observatory
is an astronomical observatory owned
in 1900, with additions
in 1906, 1967, and 20102011, it...
- A lenticular
lens is an array
so that when viewed
from slightly different
angles, different images
are magnified.[not in...
- Robert Thorburn Ayton Innes
FRSE FRAS (10 November
1861 – 13 March
1933) was a Scottish astronomer
for discovering Proxima Centauri
to as Ortho-K, Overnight Vision
Correction, Corneal Refractive Therapy
and CRT), refers
to the creation
of gas permeable...
- The optical properties
of all liquid
and solid materials change
as a function
of the wavelength
used to measure
them. This change
as a function...
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