Additionally, an iris may be present to size the beam circularly.Ī slot in the body of the unit for the insertion of metal gobos to change the pattern of the light in most cases is present, this slot can also hold a glass gobo, dichroic colour roundel or an effects unit such as a gobo rotator or iris. These allow for precise shaping and sizing of the unit’s beam as lines. #Ellipsoidal reflector spotlight seriesMost modern units include two slots that allow for combining different accessories.Ī series of four shutters mounted at the internal focal point (the place where the varying angles of light coming off the reflector meet) of the unit. The distance between these lenses and the distance between them and the reflector determines how wide the output beam of light is.Ī set of brackets on the end of the lens tube for the insertion of gel frames, a color changing unit or any variety of accessories. The Plano-Convex lenses, named for having one flat side and one convex (bowed out) side, have their convex sides facing each other within the tube. One or two Plano-Convex (PC for short) lenses within the lens tube to create the lens train. “Zoom” ERS instruments can vary the size of beam as well as the focus This results from changing the distance between the reflector and the lens train. Adjusting the tube by pushing it further in or pulling it further out of the unit allows changes to the focus (softness or hardness) of the beam of light projected by the unit. This means they can produce more light than a regular spotlight, making them perfect for use in darker areas of a room. For one, ellipsoidal reflectors are properly designed for light amplification and spread. Leko and Source Four are brand names which are often, but inaccurately, used to refer to any sort of ellipsoidal.Ĭharacteristics of a typical ellipsoidal lighting unit include:Īn adjustable lens tube containing the lens or lens train. An ellipsoidal reflector spotlight has many advantages over other types of Spotlightlights. There are many types of ellipsoidal instruments from different. Ellipsoidal Reflector Spotlight The ellipsoidal reflector spotlight combines an ellipsoidal reflector usually with either one step lens or two plano-convex lenses 'belly-to-belly'. The optics of an ERS instrument are roughly similar to those of a 35 mm slide projector.ĮRS may also be referred to as Profile Spotlights (especially in Europe) because the beam can be shaped to the profile of an object.Įllipsoidal reflectors are used for their strong, well-defined light and their versatility. One of the instruments that you will use the most is the ellipsoidal reflector spotlight. ERS: Elipseoidal reflector spotlight-the light workhorse of the theatre.ĮRS instruments are the most varied and utilized type of stage lighting instrument.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |