Introduction 1 2
Near Infrared System acquires spectra between 4000 to 12000 Wave Numbers,
or 830 to 2500 nanometers. The spectra illustrated below were taken
from five different Stents of the same production lot. The acquired
data indicate that the five Stents are in good conformity with the
acceptable limits set for production run. The presence of each chemical
composition for each Stent is represented by a range of wave-numbers.
The quantitative values of the chemical composition are measured by
the energy level reflected or absorbed as illustrated
Once the product
is selected, the SpectRx NIR system achieves
its functions without further interference. It analyzes, and displays
the output data, then stores the results in secure files stamped electronically
with date, and time of operation. The records are made permanent, and
cannot be deleted and provide an accurate history of product performance
for any inspected batch.
The selection of
the upper and lower control limits are usually achieved by the Quality
Assurance personnel. A hierarchical password level is
required to enter the secure domains. Password authority levels are assigned
by the IT department.