computer shaking head lamp internal structure is what kind?
computer moving head lamp is a high-tech product integrating electronics, machinery and optics. Qualified computer shake head lamp must be stable and reliable, excellent light efficiency, accurate positioning, good heat dissipation, lamp body and material structure meet the requirements of ergonomics. Computer shaking head lamp can be divided into 250W, 575W, 1200W and other varieties from the use of power. Among them, 1200W is the main lamp type for professional performance venues. This paper focuses on the analysis of the construction principle of 1200W moving head lamp. In a nutshell, the head shaking computer lamp is composed of three systems: optical, mechanical, electrical and program control. The three systems are interrelated and organically combined to meet the needs of light, color, speed, direction, effect, heat dissipation, noise, positioning and other elements.
optical system design mainly consider the light source luminous flux utilization. Specific performance indicators include light intensity, uniformity, saturation, and spot size. There are two factors that affect the above indicators, one is the light source, and the other is the optical system structure and material selection. At present, domestic and foreign manufacturers and users basically recommend OSRAM or PHILIPS 1200W short arc double-ended metal gas discharge lamp.
Its characteristics are compactness, high brightness, high color temperature, good color rendering and the light source can maintain a relatively stable color temperature during dimming. The disadvantage is that the delamination problem of the filler in the lamp tube, that is, the color band of the filler appears in the arc imaging or condenses in the arc tube, forming a shadow effect, which needs to be controlled in the minimum range during the design of the optical structure. In the optical structure, in order to obtain a uniform mixed beam, a parabolic reflector can be used. To collect divergent or narrow beams, a reflector with scale processing or surface texture should be selected.
The reflector system made of specular reflective materials is better than the refractive system. When it is desired to obtain several light beams from one light source, a refractive system with a combination of prisms or lenses can be used. At present, the optical design of 1200W moving head computer lamp at home and abroad adopts the method of lens combination, which is composed of aspheric (I. e. parabolic) quartz lens.
The most important feature of the parabolic lens is to place a point light source at the focal point, and a parallel beam will be obtained. In the light path design, it is also necessary to consider the correlation between the light intensity distribution curve, the shape and the size of the light source, the aperture size of the reflective lens and the shape of the light source.
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Computer shaking head lamp electrical and program control part
1. Before the electrical characteristics and circuit design of computer shaking head lamps, the vast majority of professional 1200W shaking head computer lamps worldwide used rare gas discharge bulb light sources. The starting and stable operation of the gas discharge bubble depends on the design of the circuit type, the choice of electrical components such as power supply and ballast. After the rare gas discharge bulb is started, generally no stabilization time is required. In order to ensure stabilization, the difference between the maintaining voltage of the circuit and the instantaneous voltage of the bulb should be sufficiently large during the entire AC cycle. The starting, stability, extinguishing and restarting of the light source should be designed according to the characteristics of the light source. rare gas discharge bubble
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