| |
F
FLUORESCENCE
The ability of some materials, such as phosphors, to convert ultraviolet
energy into visible light.
FADE TO BLACK (FTB)
A lighting design abbreviation for fade to black. It indicates that a light
cue takes all channels to zero over a period of time.
FEEDER CABLE
The cable which feeds or supplies power to a dimmer rack. Feeder cable is
usually heavy gauge cable capable of safely carrying the hundreds of amps
necessary to supply as many as 96 individual dimmers in a rack. Feeder
cables are usually connected via Camlock connectors. A bare-end or tail
often connects one end of a feeder to the power supply or company switch.
FILL LIGHT
A lighting design term which describes a light source or direction which is
secondary, or fills in after a primary or key light source has been
established.
FLUORESCENCE
A process by which certain pigments or materials can be made to appear to
self illuminate when exposed to UV light.
FLUORESCENT LAMP
A type of lamp which converts UV light into visible light through
fluorescence. Fluorescent lamps are one of the least commonly used lamps on
stage.
FLY-AWAY
A lighting design term referring to a cue in which automated lights move
upward away from the stage in a sweeping motion.
FOCUS
The process by which a lighting instrument is either manually or remotely
positioned to light a specific part of the stage. With conventional fixtures
focus is performed after lighting equipment is hung in place and is
connected to the proper circuit. Automated fixtures can be remotely focused
and may have many different focuses for a particular show. Focus presets are
often created as libraries of focus points for a show. Focus presets as well
as conventionally focused equipment must be checked any time a show changes
venues, as the relationship of lighting instrument and stage may change.
FOCUS PRESET
A feature of some automated fixture consoles which allows libraries of
memorized focus positions to be stored centrally in memory. Presets can then
be accessed individually by cues to position fixtures at pre- determined
locations on stage. Using focus presets is a much more efficient method for
cueing automated fixtures than writing positions individually into every cue
in a show.
FOG
A term used to describe a range of stage fog, haze, and smoke effects. Fog
is commonly created from the heat expansion and atomization of a fog fluid
in a fog machine.
|
|
