Balluff MATRIX VISION mvBlueGEMINI - Page 41

mvBlueGEMINI Technical Manual (EN) v2.6
APPENDIX 40
11.3.2.1 Direction of the light
Figure 7 Direction of the light
Source: https://wiki.zimt.uni-
siegen.de/fertigungsautomatisierung/index.php/Beleuchtungstechniken_f%C3%BCr_die_industriell
e_Bildverarbeitung
According to the direction, there are different possible uses:
Direction
Angle
Applications
Specialty
Background
lighting
Bright
field
• transparent and opaque as well as
flat or spatial parts
• often in combination with diffuse
or telecentric lighting
• suitable for testing bore holes
• Preferred lighting system for
presence monitoring (binary
image)
• uniformly bright, high-
contrast image
• almost binary attributes
Dark
field
• Transparent test objects like glass
or plastics
• Very small distance between test
objects and lens possible
• surface characteristics as
light details on a dark
background
Incident
lighting
Bright
field
• suitable for transparent and
opaque parts (glass, metal,
plastics)
• uniformly bright, well-
contrasted image