Moving Head Light resolved

Optical System 

The main light source optical system design considerations flux utilization. Specific performance indicators, including light intensity, uniformity, saturation, spot size. 

Factors affecting these indicators have two aspects, one light, two optical system structure, material selection. 

At present, domestic and foreign manufacturers, users or PHILIPS1200W basic recommendation OSRAM double-ended short-arc metal gas discharge lamp. Its characteristic is a compact, high brightness, high color temperature, color is good and light source dimmed in the process, to maintain a relatively stable color temperature. The disadvantage is that stratification within the filler tube such that the filler is a ribbon or condensation in the arc forming the arc tube, the formation of the shadow effect, the design of the optical structure need to be controlled to a minimum. In the optical structure in order to obtain uniform mixing of the beam, a parabolic mirror may be used, or a narrow beam divergence to be collected, should choose a scale processing or mirror surface texture. Specular reflective material using a reflector system is better than the dioptric system. When the light beam needs to be from one of several light sources, can be a prism or a lens system is a combination of refraction. At present, domestic and foreign 1200W moving head fixtures in optical design, lens combinations are used in a way, by the non-spherical (ie parabolic) quartz lenses and other components. The most important characteristic of a parabolic lens is placed at the focal point of light, will produce a parallel beam. In the optical design, the need to take into account the relationship of light intensity distribution curve shape, the shape and size of the light source, lens aperture size and light reflection between. 

Mechanical systems 

A wide range of mechanical systems, including the material, structure, mechanical properties, housing requirements, cooling requirements, and so on. 

Lighting material selection major considerations are: meet the functional requirements of the lamp, manufacturing ease and economy. 

At present, the international and domestic 1200W moving head light materials are mainly steel, plastic, aluminum. In considering the overall function of the lamp to meet the premise of the structural model design of the lamp, divided into different parts, the use of different materials. As Aceda-spot1200III1200W moving lights, light body shell is made of plastic, light body support frame, base, side panels, side panels made ​​of aluminum alloy castings, stamping parts, car parts. 

The structure of the lamp to determine its mechanical properties, thermal, strength, noise, weight, and other factors. International and domestic 1200W moving head light arms are used to support the structure, light body horizontal rotation of 540 °, vertical rotation of 255 °, the base portion to be done to strengthen the process to meet the requirements of moving lights hanging flip. Light body mechanical properties, mainly in the mechanical strength of the lamp body parts, so that the lamp body to work effectively within a continuous period of time, deformation, wear resistance, corrosion resistance, seismic, pressure; lamp housing must have strict waterproof, dustproof, anti-static, moisture requirements. According to dust, waterproof different degree divided into different housing protection rating requirements: as protection for indoor use scanners typically require rating IP20, outdoor fixtures protection requirements usually IP44.1200W power rating mechanical fixtures structure, cooling requirements is essential, if the cooling system defects often cause electrical parameter drift, color film, film rupture, appears plaque, resulting in crashes, out of step, out of control, such as severe fruit. 

Electrical and process control section 

1, the electrical characteristics of the moving heads and circuit design 

Within the first worldwide professional 1200W moving head fixtures vast majority using a rare gas discharge lamp light source. Starting and stability depends on the choice of gas discharge bulb circuit type design, power supply, ballast and other electrical components. After a rare gas discharge lamp start, generally do not need a stable time, to ensure the stabilization of the entire AC cycle, the difference circuit to maintain voltage and instantaneous voltage between the bulb should be sufficiently large. Start light, stability, off, restart, should be designed according to the characteristics of the light source circuit. Rare gas discharge lamp starting voltage is very high, requiring the use of transformers, starting devices, semi-resonant circuits, etc., to improve the instant start voltage. Stability of the light source after the start, depending on the matching ballasts and circuit parameters. The basic function of the ballast is to prevent current runaway and operating the light source in its normal electrical characteristics. 

Current production companies often use two ballasts, one is the inductance rectifiers, one is electronic ballasts. Advantages of good stability is the inductance of the rectifier, the disadvantage is the weight, the strength of the lamp body, handling, loading and unloading requirements are high; electronic ballast circuit of the power converter is essentially the input supply current frequency, waveform, and the extent of the changed. The advantage is light weight, easy handling, transportation; drawback is that the structural design requirements, high maintenance costs. Restart the light source, in the conventional circuit design, due to the gas discharge lamp to produce the high temperature working, the inner resistance of the vapor pressure of the bubble formation of the saturated gas, a light source is difficult to achieve immediately re-trigger, the gas pressure in the lamp must be reduced to a cold numerical later, in order to trigger a reboot. At present, the international and domestic producers of basic conventional circuit design. 

2, the program control section 

The current international and domestic fixtures DMX data format widely used to program files. DMX512 principles: speed DMX data stream is 250K, that is, each BIT is a standard 4 microseconds. 

DMX data format is divided into the following sections: 

1) IDLE (idle) or NODMXsituation (case): DMX packet when no output will be a high signal; 

2) BREAK: start DMX packet is forecasting a 88 microsecond low output {head}; 

3) MARKAFTERBREAK (MAB): MAB after BREAK, is an 8-microsecond high or two pulses; 

4) STARTCODE (SC) start code: SC is the start of data flow channel, the channel having the same data format, typically 11 microseconds or 44 pulse; 

5) MARKTIMEBETWEENFRAMES (MTBF): MTBF can for 0-1 seconds, less than one second, before the start bit in each channel can be to have a MTBF, is high; 

6) CHANNELDATA (CD): channel data frame after the SC logical format for 1-512 or less than 512; 

7) MARKTIMEBETWEENPACKETS (MTBP): After the transmission is completed in an effective data transmission is high. Computer light effects produced by different shapes King film, different color changes, a different perspective, horizontal and vertical angle of the light changes and the speed of the speed, strobe speed, aperture size changes, focal length changes and overall performance. All of these properties indicators work by the stepper motor drive to achieve, the electric stepper motor operating parameters to be defined programming is complete control scanner. 

Applications: widely used in large-scale performances, plaza and performing arts, wedding places.