Advertisement
OCR Type A230
4.2.3
Mark Detection (Gray Scale Window Checker)
Use a Gray Window checker to inspect a mark printed on an article and determine
whether or not it is acceptable. With the checker you can check the average brightness
value to determine whether or not the mark is present, and its quality (blurring etc.).
Refer to 12 Gray Scale Window Checker for a detailed explanation of each item.
For inspection by the
Gray Scale Window
checker. Refer to p. 12 − 3
for details.
− The mark to be inspected is the white part as shown in the diagram.
Inspection Procedure
4.2
IC Inspection Example
4 − 9
Advertisement
