【 Weak current College 】 arena fixture can be divided into three main categories

1. the stage of conventional lamps
Stage lighting can be divided into three main categories: floodlight, spotlight and effect light.
Floodlights (astigmatism lights or light)
Floodlight for it generally does not set the lens (except flood light floodlight), instead of using light to direct light and reflection from the surface of the plate to the reflected light, so that it has made to the nature of the structure. But as far as lighting with floodlights, it will light source direct light from the lens aperture and shoot out light, this is the spot flood lights. In addition, there is a wider range of lighting for all bar lights designed, and the stage of local result in more effective by soft lighting, or to make the curve surface is uniform lighting can adjust its angle, and other needs of individual lamps. Functional light lamps have a wide range of lighting, light and uniform characteristics with filter for other colors of light. Stage lighting floodlights General design in a row lamp, large lighting. Local effect lighting of the stage, with adjustable angle of individual lamps. Floodlight in stage lighting range cannot have spot and marked the edge of the spot.
2. spotlight
Spotlight constructor is able to issue from the light source using mirrors to concentrate the beam to the front, through the lens on the stage of local scope free to cast light. To adjust the light flux and projection angle adjustment is moving light source and move the lens type. Due to the adjustment of the resulting cast smooth illumination changes; spotlight is a fundamental stage lighting lamps, it's optical system is mainly composed of concave reflector (reflective Bowl) and its composition, it features: its spot in the middle of bright, clear, its edge lighting range narrower than the flood lights, lighting range light intensity can be adjusted. Regulation into the light source-portable and mobile two-lens, by regulating change vote glossy illumination changes, get local lighting effects. The spotlight is typically used for surface light, ears, side light, light, light columns, light, lighting, stage lighting was adopted. Adjust the projection angle of the spotlight and spot size usually has two methods: the first is the lamp holder base (General and reflective Bowl and Jack together) to make lamps before and after the move to get the best location. The second is not moving the lamp, lens on the front of the only mobile. In general use the previous method, i.e. by adjusting the position of the light source to control the projection angle and range. Their specific operation is to adjust the light hull rear focusing rod, or crank screw shaft, or the bottom of the lamp shell directly pull head position. When in operation it is necessary to pay attention to the filament largest side and the lens completely parallel, as well as the Centre of the filament tuned in on the optical axis of the lens. According to cast light on the edge of the shape, the formation of the spotlight and can be roughly divided into soft light spotlight, flat-convex lens spotlight and contour Spotlight three.
(1) soft spotlight
Outline of light is soft spot light spotlight and show in a relaxed mood. Because typically use a Fresnel lens structure, it can also be called a Fresnel lens spotlight.
(2) flat-convex lens spotlight
The nature of the light is soft light spotlight for strong, although it was clear the outline, but unlike the contour spotlight that is focused light. Because the quality from light up indicating that it is hard, so General as to its structure known as a flat-convex lens spotlight.
(3) outline spotlight (modeling the spotlight)
This lamp structure, can have mats for the surrounding light is strongly focused, is used to track the performance of the spotlight. It is different with other Spotlight, two lenses, also accompanied by can change the size of the lighting area and can make aperture lighting changes shape in Tabula Rasa.
3. effect lighting
Effect lighting is a manifestation of rain, snow, clouds, waves, flames and other phenomena of lighting equipment can also be called dance-and theatre background for effect lighting, is very important in modern stage lighting instrument. Effect lighting and General slide projector, large volume, brightness, you can make the projection, is a stage dedicated projection apparatus. Its principle and ordinary projectors are the same.