Not Using A Reading Head - Omron V530-R2000 User Manual

SECTION 9
Appendix

Not Using a Reading Head

If using a Reading Head cannot provide the required field of vision or working distance
or if the amount of light is insufficient, use the following information to select the lighting
and lens.
n Selecting the Lighting
Material
Transparent
material
Wafers
Metal
Plated or
painted sur-
face
Resin
Substrate
V530-R2000
106
User's Manual
Processing Description
Metal depo- Codes formed by metal dispo-
sition sition on a transparent mate-
rial
Front sur- Codes formed by carving the
face scribed front surface of a transparent
material
Inner mark- Codes formed inside a trans-
ing parent material
Back sur- Codes formed by carving the
face scribed back surface of a transparent
material
- Codes formed on the surface
of wafers by laser, e.g., SEMI-
T7
Mirror sur- Codes formed by laser or
face (pro- other method on cut or pol-
cessed) ished surfaces
Rough sur- Codes formed by pin stamp-
face (cast ing or other method on cast
surface) surfaces
- Codes formed by removing
metal plating, resin, or other
coating with a laser or other
method
Colored sur- Codes formed by using a laser
face to change the color of a resin
Peeled Codes formed by removing
resist sur- resist from a substrate with a
face laser or other method
Cross-section External
lighting
Through
lighting
Transparent
Coaxial
material
lighting
Coaxial
lighting
Ring lighting
Ring lighting
-
Wafers
Ring lighting
Metal
Ring lighting
- Ring lighting
Ring lighting
Resin
Ring lighting
Precau-
tions
Make back-
ground
darker.
-
-
-
-
-
-