Sekonic SR-2300 Manual page 58

OMR glossary
Timing control type
If paper has pre-printed timing marks, the scanning area (reading area) of targeted
mark frames will be determined by such timing marks.
Timing control type is a method to determine the reading zone based on the timing
mark width. Other methods include direct under type, mark to mark type, and FACOM
type.
Example: Timing control type to scan three times the timing mark width.
Set multiple numbers using the software controlling OMR.
• Top-end timing control type:
Reads n times the width of a timing mark
from the beginning of the timing mark.
• Bottom-end timing control type:
Reads n times the width of a timing mark
from the end of the timing mark.
Sensor (for reading) Reading sensor/position sensor
Sensors are photoelectrical elements that transform reflected light. We use photo
interrupters as reading sensors, so illuminating LEDs is also included. Sometimes
sensing refers to both light emission and light reception. Sometimes types that include
bar lenses are referred to as sensors.
LED wavelength influences dropout color. We use mainly three wavelengths, and
the relationships between wavelength, dropout colors, and readable colors are shown
in the table below.
Wavelength
940nm
660nm
570nm
Sorter
On a device with two or more stackers, this is a unit that can sort paper based on
information such as kind of paper and written marks.
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Color Dropout color
Colors other than
Infra red
readable colors
Visible light (red) Red, orange, pink
Visible light
Yellow, green
(greenish yellow)
...
... Reading area
N times the width of
...
a timing mark
...
...
Reading area
...
N times the width of
a timing mark
...
Readable color
Black and blue pigments
Black, blue
Red, blue, black