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Writing implements
Readable marks and unreadable marks depend on the writing instruments used.
This can also differ according to the light source that the reading sensor uses.
Relationships between sensors used for OMR (light source) and writing implements
“FACOM” type
If paper has pre-printed timing marks, the scanning area (reading area) of targeted
mark frames will be determined by such timing marks.
FACOM type refers to a method of determining the reading zone based on a pair
of start timing and stop timing marks. Other methods include timing control type,
direct under type, and mark to mark type.
Hopper
A place to put sheets to be processed for marking and compilation.
Start timing
Stop timing
Timing mark
Mark frame
Reading zone
Light source
wavelength
Color tone
Readable mark colors
and writing implement
Unreadable mark colors
and writing implement
940nm
Infra red
Color: black (pigment)
Color: other than black
(standard)
Writing implement: pencil
Writing implement: other than pencil
660nm
Visible light Color: black, brown, blue,
Color: red, orange, yellow
(red)
green, purple
Writing implement: pencil,
Writing implement:
fountain pen,
items in above colors
water/oil base ballpoint pen,
(*Option)
water/oil base marker
OMR glossary
SR-3565(E).indd 120
SR-3565(E).indd 120
2007-8-16 10:21:33
2007-8-16 10:21:33
Содержание SR-3500
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