Optical Backscatter Reflectometer 4600 97
User Guide
Suggested Setup and Use
As already discussed, the LightPath Analysis software is designed to compare
devices to an ideal Reference Trace for quality control purposes. Ideally, the
Reference Trace and all test scans for a given device or component should be stored
in the same base folder, with the Reference Trace in a āgoldenā subfolder, and test
results stored in subfolders labeled with the serial number of the test device.
The suggested setup is procedure is as follows:
1 Select Setup > File Configuration. In the Specify File Paths window
(Figure 6-2 on page 80), change the Base Folder for Output Files to
the name or model number of the part to be tested.
2 Scan several devices to determine the processing parameters required
to achieve a consistent feature list across multiple devices. Determine
the desired and achievable tolerance levels.
3 Select Setup > Data Processing Parameters from the main menu. Set
the parameters and tolerances in the Parameter Specifications window
(Figure 6-4 on page 83)
6
4 Scan an ideal device, and save its results to the golden subfolder. Select
Setup > File Configuration and select this trace as the reference.
5 Modify the Feature-Specific Tolerances for the golden trace to match
the test requirements in the Tolerance Specification window (Figure 6-
8 on page 88).
6 Scan test devices. Note the pass/fail result of each device. Save the
LightPath files for each device, using the device's serial number as the
subfolder name.
Description of Processing Parameters and
Tolerances
This section describes the various processing parameters and tolerances, and their
affects on the feature detection algorithm. The explanatory graphs below may also
be viewed from the software by clicking the question button next to any
parameter or tolerance setting in the Parameter Specifications window (Figure 6-
4 on page 83).
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