Spotlight (theatre lighting)

The prosecutor (English Followspot ) is a special form of a profile headlamp is used in order, for example on a stage, in film and television or shows ( car show, etc. ) to put the actor in the scene.

The tracker will send out a strong, precise beam of light that highlights only the portion you want and the rest can be in the dark. The name derives from the fact that the headlamp follows the actor in his movements. This can be done by a sensor, which automatically controls the headlight. However, they are unreliable and inaccurate, the development in this area is largely set. In general, it is a person (" Followers driver ") that is or is sitting at pursuers served. In most cases the unit is placed at a distance of 5 to 200 meters from the specified lighting area, at the height of the stage or above. Optimal shows the light beam while directly hitting the player, so that no unwanted light cone arise offset from the actor.

The tracker often has color filters placed in front of the lamp, if necessary, suspended, can be folded or assembled, in order to achieve corresponding color effects.

Followers are available in various designs, the performance varies widely: There are smaller pursuer with an output of 650 watts, as well as headlamps with over 4000W (xenon bulbs). The best-known large-scale tracker is the legendary SUPER- TROUPER, which was already used in the 1970s for large distances of up to 300 m. It was even named an ABBA song for him.

Also moving heads or scanners can be used with a transmitter or under manual control through a mixer as a persecutor, but usually they are too faint or have a too large dispersion, so that the illuminated area does not show a sharp edge.

• Light guide
• Headlight