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N
NANOMETERS
1 nanometer = 1 billionth of a meter, or 1 X 10-9 m.
NC / N.C. / N/C
1) (US) No Color (US equivalent of UK's OPEN WHITE).
2) Not Connected (in a circuit diagram).
NEON
1) A type of discharge lighting generated by a high voltage across two
oppositely charged electrodes at opposite ends of a long, thin glass tube
filled with neon gas. As the electrical charge flows between the electrodes,
electrons collide with neon atoms causing them to give off energy in the
form of visible light. Different colors can be obtained by mixing other
gases, or by using fluorescent coatings. Mostly used for advertising signs -
the glass tube is bent to form letters.
2) A small mains voltage indicator lamp.
NEUTRAL DENSITY FILTER
(ND) Lighting filter which reduces the brightness/intensity of a light
source without changing its color value. Used extensively in TV/film for
reducing the intensity of discharge lamps or natural light sources (e.g.
windows). Rarely used in theater as dimmers fulfil a similar function
(although as incandescent lamps are dimmed, the color temperature gets
warmer).
NIETHAMMER
Brand of zoom profiles & followspots with halogen or HMI lamps. Very popular
in Europe. Named after Emil Niethammer.
NON DIMS
Channels, usually controlled from the lighting desk which are switched,
rather than dimmed. This enables motors, slide projectors, smoke machines
etc to be controlled from the lighting desk.
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