Sekonic SR-2300, Manual, Page: 61 / 70

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OMR glossary
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
Color tone
Readable mark colors Unreadable mark colors
wavelength and writing implement 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
570nm Visible light Color: black, brown, blue, Color: yellow, green
(greenish purple, red
yellow) Writing implement: pencil, Writing instrument:
fountain pen, items in above colors
water/oil base ballpoint pen,
(*Option) water/oil base marker