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The perfect measurement partner. Our optical tooling scales provide
the perfect partner for our optical alignment instruments,
providing tremendous targeting and measurement flexibility.
Once a reference line of sight is defined by any of our
instruments, optical tooling scales give you the ability to measure lateral deviations to
that line of sight from almost any object - and do so
with a high degree of precision. Available in both
English and metric units, these scales are precisely read
using our optical
micrometers. The optical micrometer on an instrument
acts as a "vernier", and divides the scale's
intervals into smaller parts, routinely producing measurement
resolutions as small as 0.001" or 0.02 mm. (Of
course, you must be sure to use English scales with English
micrometers, and metric with metric!)
Our scales are made of hardened tool steel with a matte white surface,
and have a glare-reducing topcoat. The paired-line graduations are
black to provide maximum contrast. Each inch (or centimeter) is numbered
for easy reading, regardless of distance. The largest numerals
indicate where each major division begins.
Scale Pattern
(3, 10, 20, & 40 in.) |
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Paired-line spacings:
0.004", 0.010", 0.025", and 0.060" |
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Scale Pattern
(5
in) |
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Paired-line spacings:
0.005", 0.010", 0.025", and 0.050" |
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English unit scales. These scales come in 3", 5",
10", 20", and 40" lengths.
All have the pattern shown at right below except for the
5" scale. The 5" scale has the pattern shown at far right. Both patterns are almost identical and are easy
to use with any Brunson or K+E transit or level.
Metric scales. Our metric scales are manufactured just like
all of our other scales, using the same high quality materials
and the same process. Our metric scales all have the
same pattern (image below, right).
Multiple shot-distance targets. The pattern on all of our scales is
specifically designed to make the scale useful at a variety of
focal distances, continuously from zero to about 100 feet (30
meters). A pattern of four distinct paired-line targets
(across the width of each scale), appearing as adjacent sets
of bars or blocks, repeats over the length of the scale every
0.100" or 0.2 mm, depending upon whether the scale is
English or metric.
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Scale Pattern (Metric) |
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Paired-line spacings:
0.13mm, 0.25mm, 0.60mm, and 1mm |
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The filar/bi-filar reticle in our instruments makes it possible to
position the line of sight (using an optical micrometer) accurately between
any of the paired line targets on the scale. When close up, the
smallest pair of "tick" marks is used. As
viewing distance increases, the progressively wider
paired-line spacings are used.
You won't get lost. It is sometimes possible to use the
English-unit scales at such a
close distance that the field of view will not include the
closest "inch" number, making it impossible to tell
which "inch" interval you are reading. We
solved this problem by printing the whole inch integer three
times over the length of each inch (see English scale pattern pictured
on this page above). Our metric scales do not need this extra
accommodation because it is almost
impossible to get close enough to a metric scale to lose sight
of the "centimeters" digit. Finally, each inch is divided into 10 equal
segments; only the even increments are labeled.
Calibration reference scales. We provide
special scales for use with
calibration applications. Rather than having a graduated
scale pattern, these scales have an optical target placed at a
known distance from the end. When used in conjunction
with our Invar scale extensions,
these scales provide a convenient length reference tool for
calibrating 3-D measurement systems using theodolites and
total stations.
Lots of accessories. We offer a number of accessories so
you can get the most out of your scales. These include
levels,
magnets, and other types of holders. We also offer a
number of Invar scale extension
accessories, which allow you to extend the effective length of
your scales as well as increase their flexibility.
Have a look at our English and Metric scales.
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