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Mechanical - Metrology and Measurements - Linear and Angular Measurements

**TECHNICAL
TERMS**

·** Comparators**

Comparators are one form of linear
measurement device which is quick and more convenient for checking large number
of identical dimensions.

·** Least count**

The least value that can be measured by
using any measuring instrument known as least count. Least count of a
mechanical comparator is 0.0 1 mm.

·** Caliper**

Caliper is an instrument used for
measuring distance between or over surfaces comparing dimensions of work pieces
with such standards as plug gauges, graduated rules etc.

·** Interferometer**

They are optical instruments used for
measuring flatness and determining the length of the slip gauges by direct
reference to the wavelength of light.

·** Sine bar**

Sine bars are always used along with
slip gauges as a device for the measurement of angles very precisely.

·** Auto-collimator**

Auto-collimator is an optical instrument
used for the measurement of small angular differences, changes or deflection,
plane surface inspection etc.

Tags : Mechanical - Metrology and Measurements - Linear and Angular Measurements

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