laboratory aim density (LAD): A value specified in the control of processing intermediate film.
lacing: To thread a motion picture projector or magnetic tape recorder.
lacquering: Coating the surface of motion picture film with a transparent layer to reduce or eliminate the visibility of scratches or abrasions.
lambert (L): Unit of luminance (1) (surface brightness) equal to one lumen per square centimetre. Named after the eighteenth century German physicist, mathematician and astronomer Johann Heinrich Lambert.
lamp-failure detector: A device to detect and report projector lamp failure. See automatic lamp changer.
lamp inertia: The time taken for the light output of a lamp to fall to zero when switched off.
land: On a printed circuit board ...