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R
RESTRIKE TIME
Usually applied to HID light sources, the interval between the extinguishing of an arc and the time it can be reignited.
RETINA
A membrane lining the posterior part of the inside of the eye. It comprises photoreceptors (cones and rods) that are sensitive to light and nerve cells that transmit to the optic nerve the responses of the receptor elements.
RETROFIT
A modification that can be made to an existing piece of equipment after purchase to bring it up to date.
RFU
Remote Focus Unit. Name used by ETC for a remote control for the lighting desk. Same as RIGGERS CONTROL.
RHEOSTAT
A resistance dimmer.
RIG
- (noun) The construction or arrangement of lighting equipment for a particular production.
- (verb) Installing lighting, sound equipment and scenery etc for a particular show.
RIG CHECK
(also known as LAMP CHECK) The process of checking all lanterns in the rig are working correctly prior to each performance. Should be done daily in sufficient time to change a lamp if necessary. Most venues do not have the electrical capacity to run all lanterns at full for a rig check, so a level of 25% is normally used.
N.B. this is NOT the same as preheating - a rig check happens before each performance and involves the whole rig, and preheating involves individual lanterns/dimmers and happens before a cue in which that lantern appears.
RIGGER
A technician chiefly responsible for the rigging for a tour or production.
RIGGERS CONTROL
A remote control for a lighting desk which enables dimmer channels to be called up from the stage when rigging or focusing. Usually battery powered, sometimes with infra-red (cordless) control. A Designers Control allows whole memories to be called up and/or played back, as well as individual dimmers.
RIGGING
The process by which scenery, truss, or other equipment is flown on aircraft cable or chain.
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