The video measurement capabilities afforded by metrology systems are appropriate for measuring components of intravenous catheters and hypodermic syringes. Also known generically as “sharps,” these medical devices are made of metal and plastic, and are constructed and assembled to tight tolerances.
Given the heightened concern about blood-borne diseases, sharps manufacturers are also designing safety features to protect healthcare workers from needlestick injuries. Hundreds of metal and plastic safety device designs are in use, each of which requires accurate dimensional measurement to perform as designed.
Typically, sharps needles are 0.02" (0.5 mm) in diameter, while supporting safety components may have design tolerances of ± 0.0005" (0.0127 mm) or less. Precision optics, staging, and video algorithms allow the SmartScope Flash 500 from Optical Gaging Products, Inc. to verify these critical dimensions without touching the part. In doing so, the system is said to offer complete measurement with one setup, quantifiable part shrinkage and repeatability.
The 12:1 self-calibrating AccuCentric zoom lens allows outer dimensions to be measured at low magnification with backlight to illuminate edges, and small metal components to be measured at high magnifications with surface illumination—without refixturing the part.