1.Illumination uniformity
The lighting uniformity is used to measure the visual conditions in the venue. The uniformity of lighting means that the stadium should be able to be evenly illuminated, and there should be no areas that are too bright or too dark, so as to provide good visual conditions for athletes, spectators, and referees. For example, for television broadcasting, when the camera shoots the panorama of the competition area, the illuminance cannot change greatly, otherwise the camera will be exposed.
2.Glare
Glare is another important factor in the evaluation of lighting quality. The generation of glare is related to the installation method, installation height, quantity and installation density of lamps, and light distribution of lamps. When there is too high brightness contrast in the field of view, people will feel dazzling, thereby affecting people's vision. If you look at the sun at noon on a sunny day, you will feel that you cannot open your eyes. This is the glare caused by excessive brightness. The glare of the badminton court is direct glare. Due to the low ceiling, the light source is very dazzling when the athletes exercise, and the eyes are uncomfortable over time, which seriously affects the athlete's observation of the ball movement.
3.No flicker
The stability of lighting directly affects people's health, and unstable lighting can lead to reduced vision of athletes. The lighting stability is mainly reflected in the stroboscopic effect. The stroboscopic is caused by the periodic change of the current when the AC power is supplied, and the luminous flux will also change periodically, making people feel illusion when observing moving objects. The periodic change of current causes the light source to be unstable. As a result, there is obvious flicker during artificial lighting. When observing the movement of the shuttlecock, you can see a blurry shadow with low resolution.
4.Luminance
The color of the badminton is white, and the background wall is white, which will cause the players to lose sight of the course. In order to increase the color difference between the shuttlecock and the background wall, the light and shadow effect of the lamp is used to reduce the brightness of the background wall. An opaque lampshade can be used to block the shadow of the lampshade onto the wall, while another part of the light shines on the ground and reflects into the field, thereby reducing the brightness of the background wall, making the contrast between the badminton and the background large, and making the vision clearer when the shuttlecock is moving.
