|
Source Four
The Electronic Theatre Controls (ETC) Source Four (also known unofficially as Source 4 or S4) is an ellipsoidal reflector spotlight (ERS) used in stage lighting. First released in 1992, the Source Four was invented by David Cunningham and features an improved lamp and reflector compared to previous ERS designs, tool-free lamp adjustment, and a rotating, interchangeable shutter barrel. The Source Four is widely used by professional theaters across the globe. Glass reflector The Source Four uses a faceted borosilicate reflector behind the lamp. Nearly all stage lights have some form of reflector positioned behind the lamp to reflect otherwise wasted light out of the front of the instrument. The Source Four's reflector is dichroic, meaning that it reflects light of only certain wavelengths. The Source Four's reflector reflects back 95% of the visible light striking it, while allowing over 90% of the infrared radiation (heat) to pass out the back of the instrument. This produce ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Source Four ERS
The Electronic Theatre Controls (ETC) Source Four (also known unofficially as Source 4 or S4) is an ellipsoidal reflector spotlight (ERS) used in stage lighting. First released in 1992, the Source Four was invented by David Cunningham and features an improved lamp and reflector compared to previous ERS designs, tool-free lamp adjustment, and a rotating, interchangeable shutter barrel. The Source Four is widely used by professional theaters across the globe. Glass reflector The Source Four uses a faceted borosilicate reflector behind the lamp. Nearly all stage lights have some form of reflector positioned behind the lamp to reflect otherwise wasted light out of the front of the instrument. The Source Four's reflector is dichroic, meaning that it reflects light of only certain wavelengths. The Source Four's reflector reflects back 95% of the visible light striking it, while allowing over 90% of the infrared radiation (heat) to pass out the back of the instrument. This produce ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
DMX512
DMX512 is a standard for digital communication networks that are commonly used to control lighting and effects. It was originally intended as a standardized method for controlling stage lighting dimmers, which, prior to DMX512, had employed various incompatible proprietary protocols. It quickly became the primary method for linking controllers (such as a lighting console) to dimmers and special effects devices such as fog machines and intelligent lights. DMX512 has also expanded to uses in non-theatrical interior and architectural lighting, at scales ranging from strings of Christmas lights to electronic billboards and stadium or arena concerts. It can now be used to control almost anything, reflecting its popularity in all types of venues. DMX512 uses a unidirectional EIA-485 (RS-485) differential signaling at its physical layer, in conjunction with a variable-size, packet-based communication protocol. DMX512 does not include automatic error checking and correc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Intelligent Lighting
Intelligent lighting refers to lighting that has automated or mechanical abilities beyond those of traditional, stationary illumination. Although the most advanced intelligent lights can produce extraordinarily complex effects, the intelligence lies with the human lighting designer, control system programmer, or the lighting operator, rather than the fixture itself. For this reason, intelligent lighting (ILS) is also known as automated lighting, moving lights, moving heads, or simply movers. More recently the term has fallen into disuse as abilities once reserved to a specific category of lighting instruments (most notably colour changing and variable focus) have become pervasive across a range of fixtures. The distinction has become more blurred with the introduction of machines that would not be considered lights but share the ability to move their orientation and are operated by the same DMX512 control protocol, such as moving yoke projectors. History There are many patents ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Source Four Revolution
Source may refer to: Research * Historical document * Historical source * Source (intelligence) or sub source, typically a confidential provider of non open-source intelligence * Source (journalism), a person, publication, publishing institute or other record or document that gives information * Source document, a document in which data collected for a clinical trial is first recorded * Source text, in research (especially in the humanities), a source of information referred to by citation ** Primary source, a first-hand written evidence of history made at the time of the event by someone who was present ** Secondary source, a written account of history based upon the evidence from primary sources ** Tertiary source, a compilation based upon primary and secondary sources * Sources (website), a directory of expert contacts and media spokespersons * Open source, a philosophy of dissemination of intellectual products Law * Sources of international law, the materials and processes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fresnel Lantern
A Fresnel lantern (pronounced ''frəˈnɛl or fruh-nel'') is a common lantern used in theatre that employs a Fresnel lens to wash light over an area of the stage. The lens produces a wider, soft-edged beam of light, which is commonly used for back light and top light. The distinctive lens has a 'stepped' appearance instead of the 'full' or 'smooth' appearance of other lenses. This allows the lens to have a much greater curvature than would otherwise be practical. The lens focuses the light by tilting each ring of glass slightly more toward the center as the distance is increased from the center of the lens. If the glass were completely flat, this would cause a corresponding pattern of circles of light, so Fresnel lenses are usually stippled on the flat side. This pattern of small bumps helps to break up the light passing through the lens and gives Fresnels their characteristic soft beam. This means that the intensity of the light is consistent across the spread of the beam of ligh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Source Four PAR
The Source Four PAR is a stage lighting instrument manufactured by Electronic Theatre Controls. The name of the fixture derives from the stylistic and construction features it shares with ETC's Source Four. The suffix identifies the Source Four PAR as a parabolic aluminized reflector (PAR). It is designed and marketed as a modern, energy efficient alternative to traditional PAR fixtures used in theatrical and broadcast lighting. Construction The Source Four PAR is designed to use the same HPL lamp used in other ETC Source Four fixtures. The HPL lamp, combined with newer aluminum reflector technology, is designed to allow for more light output while using a lower wattage. The light output of a 575 watt HPL in a Source Four PAR is listed as comparable to that of a 1000 watt traditional PAR64. The Source Four PAR can also be fitted with 375, 550, or 750 watt HPL lamps. The fixture allows for beam and field adjustment using interchangeable lenses, and is designed for "shaping" ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hydrargyrum Medium-arc Iodide Lamp
Hydrargyrum medium-arc iodide (HMI) is the trademark name of Osram's brand of metal-halide gas discharge medium arc-length lamp, made specifically for film and entertainment applications. ''Hydrargyrum'' comes from the Greek name for the element mercury. An HMI lamp uses mercury vapour mixed with metal halides in a quartz-glass envelope, with two tungsten electrodes of medium arc separation. Unlike traditional lighting units using incandescent light bulbs, HMIs need electrical ballasts, which are separated from the head via a header cable, to limit current and supply the proper voltage. The lamp operates by creating an electrical arc between two electrodes within the bulb that excites the pressurized mercury vapour and metal halides, and provides very high light output with greater efficiency than incandescent lighting units. The efficiency advantage is near fourfold, with approximately 85–108 lumens per watt of electricity. Unlike regular incandescent halogen lamps where ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SeaChanger Color Engine
The SeaChanger Color Engine is an electro-mechanical device that is used to control light color in entertainment-industry lighting applications. The unit employs four overlapped color filter wheels, inserted into a light beam near its source, to produce colored light. This is in contrast to color scrollers, which insert color filter ribbons into a light beam. The color engine, which was released by Ocean Thin Films in 2005, is designed to fit into the Source Four lighting instrument made by Electronic Theatre Controls.SeaChanger Introduces Wash Color Engine Technology The SeaChanger Color Engine is designed to fit between the reflector assembly and lens barrel of a Source Four ellipsoidal, replacing the gobo slot and accessory slot. It is designed t ...[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gobo (lighting)
A gobo is an object placed inside or in front of a light source to control the shape of the emitted light and its shadow. For studio photography purposes, the term "gobo" has come to refer to any device that casts a shadow, and various pieces of equipment that go in front of a light (such as a gobo arm or gobo head). In theatrical lighting, however, the term more specifically refers to a device placed in "the gate" or at the "point of focus" between the light source, called a lamp, and the lenses (or other optics). Derivation The Oxford DictionaryKelby, Scott (2006). The digital photography book : the step-by-step secrets for how to make your photos look like the pros'! First edition, p. 40. Peachpit Press, Berkeley, California. gives three definitions (and others concur): "A dark plate or screen used to shield a lens from light; (in a theatre) a partial screen used in front of a spotlight to project a shape; shield used to mask a microphone from extraneous noise." ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Theatrical Technician
A theatrical technician (also known as a tech, technician, theatre tech, theatre technician, or techie) is a person who operates technical equipment and systems in the performing arts and entertainment industry. In contrast to performers, this broad category contains all "unseen" theatrical personnel who practice stagecraft and are responsible for the logistic and production-related aspects of a performance including designers, operators, and supervisors. Typical positions Theatrical responsibilities taken by technicians include: * Set construction and theatrical carpentry * Sound system configuration and operation * Lighting design and light board operation, Followspot operation, hanging and maintenance of stage lighting instruments as well as various other electrical jobs * Flying of scenery and occasionally even actors by fly men * Rigging of moveable and stationary set pieces by riggers * Stage management * Costume and prop management * Operation of Special ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Control Booth (theater)
The control booth, control room, lighting box, technical booth, tech booth, or just booth used by television, film or theatrical technicians is the area designated for the operation of technical equipment (lighting and sound), lighting controls and sound board. Often one or two followspots may be located in the booth as well. In a theater, it is generally an enclosed space with a large sliding window with a good view of the stage centered in the back of the house. It may be on the ground floor or at the balcony level. In a film or television production, it might be in a trailer or other space near the studio. It is designed to allow lighting and sound operators to be able to see the performance, without being in the auditorium itself. This means that they are free to talk to their colleagues in the booth, and also the stage management team and other crew members via the communications headset. A booth that is sealed to the auditorium also allows for noisier equipment to be u ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scrim (material)
A scrim is a woven material, either finely woven lightweight fabric widely used in theatre, or a heavy, coarse woven material used for reinforcement in both building and canvasmaking. Light gauzy material A scrim or gauze is often a very light textile made from cotton, or sometimes flax or other materials. It is lightweight and translucent, which means it is often used for making curtains. The fabric can also be used for bookbinding and upholstery. Scrims have seen extensive use in theatre. There are several types used for special effects. The variety typically used for special effects is called ''sharkstooth scrim''. However, in theater a scrim can refer to any such thin screen, and is made out of a wide variety of materials. Sharkstooth scrim is woven and earns its name because the weave resembles a set of triangles that resemble a shark's teeth with openings similar in size to a window screen's. The most common effects that scrim is used for is the 'reveal effect', in whic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
