Double image micrometer

Definition of 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.

See also: Micrometer

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Double
Double acrostic
Double base
double bond
Double convex
Double counterpoint
Double court
double cross
Double dagger
Double dealer
Double dealing
Double drum
Double eagle
Double elephant paper
Double entry
Double first
Double floor
Double flower
Double fugue
Double geared
-Double image micrometer-
Double letter
Double note
Double octave
Double pedro
Double pica
Double play
Double plea
Double point
Double position
Double quarrel
Double refraction
Double refraction micrometer
Double riveting
Double salt
Double shuffle
double standard
Double star
Double sulphide
Double tansy
Double time
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