Victor Xu Page 77 12 Jan. 2011
Copyright 2011 © Shenzhen Runtianzhi Image Technology, Co., Ltd.
http://www.floradigital.com
Dot Size - Relative size of halftone dots as compared to dots of the screen ruling being used. There is no
unit of measurement to express dot size. Dots are too large, too small or correct only in comparison to what
the viewer finds attractive.
Dots-per-inch - Measure of resolution of input devices such as scanners, display devices such as monitors,
and output devices such as laser printers, image setters and monitors. Abbreviated DPI. Also called dot pitch.
Drop-On-Demand (DOD) / impulse - an ink jet system in which pressure pulses are generated directly in
the print head by piezo crystals or heated resistors to eject drops of ink only when they are needed to print a
dot
Drop Mass or Drop Volume - The size of a jetted drop of ink, usually measured in nanograms. Adequate
jet-to-jet drop mass uniformity is required in many applications to eliminate banding When the specific gravity
is 1, 1picoliter (pL) = 1 nanogram (ng).
Drop Velocity - The speed at which a drop of jetting fluid travels from the orifice plate to the receiving
medium.
Encapsulated Postscript File (EPS) - An Adobe graphic file format for high resolution images; it translates
graphic and text into code that tells a printer to print in the highest resolution possible and also has low
resolution view files for quick screen viewing.
Encoder - An encoder is a device or transducer that converts linear or rotary motion information into
uniformly spaced incremental signals.
First In First Out (FIFO) - A form of low-level memory (for example, a shift register. Used in the data path for
temporary storage of bitmap data on its way to a print head.
Fire Pulse - A high voltage electrical signal of precise shape, amplitude, and width, causing a jet to eject a
drop. Also called a drive pulse.
Firmware - Embedded software, i.e., software that is not loaded from a storage device at startup, but instead
resides on the board or in the chip.
Fire Pulse Amplitude (FPA) - The peak voltage of a fire pulse.
File Transfer Protocol (FTP) - The language used to facilitate the transfer of files from a server on the
Internet to another location, such as a desktop computer or another server.
GIF Graphic Interchange Format - An image format type generated specifically for computer use. Its
resolution is usually very low (72 dpi, or that of your computer screen), making it undesirable for printing
purposes.
Gradient - Color in shades from one starting point to another gradually blending in between. A grade change
in a hue. It is a transition of color, creating a blended change between screen percentages of a single color
or between two different colors
Grain - The direction in which the paper fiber lie.
Head Drive Electronics Module (HDEM) - This is the component of the Apollo PSK that creates the high
voltage drive pulses. It is programmable for pulse amplitude and width, as well as rise and fall time.
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