Sekonic SR-6500 HYBRID Operating Manual page 109

OMR glossary
Equipment
Reading sensor/position sensor
Sensors are photoelectrical elements that transform reflected light. Sometimes
sensing refers to both light emission and light reception.
LED wavelength influences dropout color. We use mainly two wavelengths, and
the relationships between wavelength, dropout colors, and readable colors are
shown in the table below.
Wavelength
940nm
660nm
Hopper
A place to put sheets to be processed for marking and compilation.
Stacker
A place that sheets that have been read are temporarily stacked. Stacker volume
refers to the number of sheets that can be accommodated. Example: stacker
volume 200 sheets.
Transmission interface
A hardware device that works as an interface connecting together a computer
and an OMR.
This product uses an interface with USB 2.0.
Writing implements
Readable marks and unreadable marks depend on the writing instruments used.
Those also differ according to the light source that the reading sensor uses.
Relationships between sensors used for OMR (light source) and writing implements
are shown in the table below.
Readable mark colors
and writing implement
Color: black (pigment)
Writing implement: pencil
Color: black, brown, blue,
green, purple
Writing implement:pencil,
fountain pen,
water/oil base ballpoint pen,
water/oil base marker
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Color Dropout color
Colors other than
Infra red
readable colors
Visible light (red) Red, orange, pink
Light source
wavelength
940nm
(standard)
660nm
(*Option)
Readable color
Black and blue
pigments
Black, blue
Color tone
Infra red
Visible light
(red)