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An Optical
Comparator (often referred to as a "Comparator" or
sometimes as a "Shadowgraph") is a device
that applies the principles of optics to the
inspection of manufactured parts. In a
comparator, the magnified silhouette of a
part is projected upon the screen, and the
dimensions and geometry of the part are
measured against prescribed limits. Today,
most comparators make use of Digital
Readouts (DRO) to increase their geometric
functionality and ease of use. |
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| Things to consider when selecting a
Comparator: |
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| • The proper
magnification to cover the range |
• The proper
screen size. Lower magnification,
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of jobs. |
for example, requires the use of a larger
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screen. |
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| • A sturdy
platform to reduce movement and |
• A
Digital
Readout to improve ease of use and
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a stage made of a COE-stable material. |
accurate measurements. |
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Bradford Instrument
& Gage proudly offers
Dorsey and
Nikon
Optical Comparators. |
