K-Patents PR-33-S Troubleshooting Guide - Manual (Page 5)

TROUBLESHOOTING GUIDE
FOR PR-33-S AND PR-33-AC 5 (10)
January 9, 2015
K-PATENTS OY
•
Postal Address: P.O.Box 77, FI-01511 Vantaa, Finland
•
Street Address: Elannontie 5, FI-01510 Vantaa, Finland
•
Tel. int.+358 207 291 570
Fax int.+358 207 291 577 • [email protected] • www.kpatents.com • VAT No. FI03035575 • Business ID 0303557-5 • Registered in Helsinki
Figure 5
IDS image on the left and raw image on the right
The detection of the measurement point is based on the steepest slope from the optical image (borderline of
activated vs inactivated light reflection). The slope image gives a derivative graph of the optical image that
can be used to examine the quality of the optical image and stability of the measurement.
Figure 6
Optical image and slope without sample
Without a sample on the prism surface the optical image should always return to “box” shape. Any outside
light can also affect the shape of the optical image, therefore, the prism should be covered when inspecting
the optical image. If the optical image is not shown as above, the prism should be cleaned with a glassfiber
brush, and inspected for scratches or marks.
Figure 7
Optical image and slope during measurement
During operation the optical image bends at a certain position which depends on the RI of the measured
medium. Also a clear dip appears on the slope image. A greater dip on the slope image demonstrates better
optical image quality and more stable measurement.