The SavvyInspector(r) for objective and
Army traceable scratch and dig inspection
(c) 2020 Savvy Optics Corp.  All rights reserved.
The inspection stations from Savvy Optics allow an objective
measurement of scratch and dig visibility.  Available in multiple
configurations, including f
or flats and curved surfaces, and large
motorized and automated options.  Inquire for quote.
The SavvyInspector(r) provides software assisted scratch/dig evaluation of
flat optical surfaces, r
emoving the subjectivity of human surface quality
inspection. The instrument is designed specifically to reproduce the
conditions of an in-reflection visual inspection described in Appendix C of
MIL-PRF-13830B, “General specification governing the manufacture,
assembly, and inspection of optical components for fire control
instruments.”  The factory calibrated inspection head of the SavvyInspecto
uses invariant illumination and detection optics and propriety analysis
software, allowing objective, repeatable, and recordable evaluation of
scratch/dig surface quality.
System Operation
A typical inspection involves a  visual scan of the surface using a high-
intensity fiber lamp, to generate a quick surface map of imperfections that
are to be evaluated.  When mapping the surface, a qualified inspector can
also record the scratch lengths to be to be used for accumulation.  The part
is then loaded into the SavvyInspector
(r) and each defect is evaluated
based on the selected calibration standard.  Defect images can be stored if
desired.  The operator then enters the values of the surface imperfections
onto the surface map or into the SavvyAccumulator™, a free-ware
spreadsheet also provided with the instrument, which reports whether the
part passes or fails the surface quality inspection.  The accumulator page
can be printed or saved into the same location as the defect images for
future review.
The SavvyInspector
(r) operator interface is designed for easy factory-floor
operation.  Inspection mode allows the operator to perform a surface quality
scratch or dig evaluation based on a pre-recorded calibration file.  There
are no knobs to turn, keys to press, or adjustments required; the operator
simply uses the manual x-y stage to locate the desired defect on the real-
time viewing screen, and read the scratch/dig value off the screen in real-
time. The resultant image file can be stored for later review or printed to be
included in an inspection report.
Instrument Calibration
The SavvyInspector(r) software comes
from the factory with calibration files based
on all the most common and respected
comparison standards manufactured by
Brysen Optical, Davidson Optronics, and
Jenoptik. Sets of calibration artifacts have
been sequestered in order to guarantee
instrument to instrument agreement during
the manufacture of each SavvyInspector
If the user needs a scratch inspection done to a standard which is not in
the factory calibrations library, a custom calibration file can be created.  
The tool owner just enters the password protected calibration mode,
presents the SavvyInspector
(r) with the desired comparison artifact, and
enters the measured visibility into the appropriate data field for that scratch
number.  The calibration data can then be saved and accessed from the
inspection mode.  No changes can be made to factory calibration data.
Screen shot of user interface, SIF-4
Scratch/Dig Standards Supported
 ANSI/OEOSC OP1.002:2009
Visibility Method
ISO 10110-7 Visibility Method
SIF4 Tech specs
(r) SIF4
Information Sheet
(r) SIF4M
Information Sheet
SIF4E tech spec
Scratch and Dig Primer
Takaki and Aikens,
"Objective Scratch and
Dig Measurements"
Scratch and Dig Revolution
Objective Scrathc and Dig Measurements - Takaki 2012
SIF4E tech spec
(r) SIL-4
Information Sheet