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BINOCULARS |
Optical instrument |
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PROJECTOR |
Optical instrument |
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MICROSCOPE |
Optical instrument |
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PERISCOPE |
Optical instrument |
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TELESCOPE |
Optical instrument |
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CATOPTRON |
A reflecting optical glass or instrument; a mirror. |
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FIELD |
The space covered by an optical instrument at one view. |
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CHROMASCOPE |
An instrument for showing the optical effects of
color. |
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DIOPTRA |
An optical instrument, invented by Hipparchus, for taking
altitudes, leveling, etc. |
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OCULAR |
The eyepiece of an optical instrument, as of a telescope or
microscope. |
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DEFINITION |
Distinctness or clearness, as of an image formed by an
optical instrument; precision in detail. |
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GRAPHOSCOPE |
An optical instrument for magnifying engravings,
photographs, etc., usually having one large lens and two smaller ones. |
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STAUROSCOPE |
An optical instrument used in determining the position
of the planes of light-vibration in sections of crystals. |
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ERECTOR |
An attachment to a microscope, telescope, or other optical
instrument, for making the image erect instead of inverted. |
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PHANTASCOPE |
An optical instrument or toy, resembling the
phenakistoscope, and illustrating the same principle; -- called also
phantasmascope. |
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THAUMATROPE |
An optical instrument or toy for showing the
presistence of an impression upon the eyes after the luminous object is
withdrawn. |
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DEFINE |
To determine with precision; to mark out with
distinctness; to ascertain or exhibit clearly; as, the defining power
of an optical instrument. |
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APERTURE |
The diameter of the exposed part of the object glass of a
telescope or other optical instrument; as, a telescope of four-inch
aperture. |
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EYEPIECE |
The lens, or combination of lenses, at the eye end of a
telescope or other optical instrument, through which the image formed
by the mirror or object glass is viewed. |
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SPECTACLE |
An optical instrument consisting of two lenses set in a
light frame, and worn to assist sight, to obviate some defect in the
organs of vision, or to shield the eyes from bright light. |
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SPECTROSCOPE |
An optical instrument for forming and examining
spectra (as that of solar light, or those produced by flames in which
different substances are ... |
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PHONEIDOSCOPE |
An instrument for studying the motions of sounding
bodies by optical means. It consists of a tube across the end of which
is stretched a film o... |
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POWER |
The degree to which a lens, mirror, or any optical
instrument, magnifies; in the telescope, and usually in the microscope,
the number of times ... |
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PHANTASMAGORIA |
An optical effect produced by a magic lantern. The
figures are painted in transparent colors, and all the rest of the
glass is opaque black. Th... |
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SEXTANT |
...ween
objects, -- used esp. at sea, for ascertaining the latitude and
longitude. It is constructed on the same optical principle as Hadley's
q... |