The larger the area of ​​the light source, the more severe the glare conditions and the glare effects. Such as the large chandeliers hanging in the hall, when the shading lamp cover is not handled properly, the suspension phenomenon is more serious. Increase the angle between the glare source and the line of sight. As this angle increases, the effect of glare on the visibility is reduced as shown in the figure, which can also be achieved by limiting the height of the light source.
Indoor general lighting minimum suspension height decay number source type illuminator form illuminator protection angle bulb power minimum suspension height incandescent lamp with reflector I, and the following above white glass and the following diffused lamp a fluorescent high with reflection hood. The darker the background is, the brighter the object is, the more contrast there is, the more prone to glare, and the more uncomfortable the effect. If you turn off the indoor lighting completely when you watch TV, the indoors are very dark. If you have a long time, you will easily experience visual fatigue and feel uncomfortable. This is because the contrast between the two is too great. For this reason, moderate lighting of the room is necessary when watching TV. As in the above example, minimizing the contrast between the object being viewed and the brightness of the room is necessary to reduce glare. Reflected glare It is produced by a high-intensity image or brightness difference reflected by a directional reflective surface within the field of view. This reflection causes both discomfort and distraction. If it is next to the object being viewed, it will also cause a decrease in the visibility of the object.
The following methods minimize reflection glare. The brightness of the light source is as low as possible. This can be done with a low-brightness light source or with a suitable shading or diffusing material or both within the luminaire to control the brightness of the reflected image to within acceptable limits. Change the position of the luminaire or work surface so that the reflected image does not strike the observer's eyes. The brightness of the light source is reduced, and the number of light sources is increased, so that the proportion of the illuminance formed on the workpiece caused by the light source causing the reflection is reduced in the total illumination. Under special conditions, the characteristics of the working surface can be changed to reduce the specular reflection and the glare it forms. If we take a color picture with a higher finish and watch it under the light, you will turn the cartoon when the light in the interference zone is strong, and the reflection will appear in some angles, making you feel unclear. This is the reflection of the light curtain phenomenon. If the position between the light source, the object to be observed and the observer is improper, light curtain reflection will occur, causing the visibility to drop. If the light source comes from the back direction and the line of sight is basically the same, the light curtain reflection effect is the smallest. When the light source comes from the interference area opposite the line of sight, the light curtain reflection effect is relatively large, and at some angles it will be the most serious and from the side. There is no light curtain reflection effect in the light. Measures to Reduce Light Curtain Reflection The object to be observed should minimize or reduce its finish and the brightness of the object.
Increase the illuminance to compensate for the loss of contrast. Reduce the light from the interference zone, increase the light outside the interference zone, reduce the light curtain reflection, and increase the effective illumination. Try to get the light from the side to reduce the light curtain reflection. Use a reasonable light distribution. For example, the direct type luminaire has a strong downward light, which is easy to form a serious light curtain reflection. When it is a wide-light distribution type direct luminaire, the downward light is correspondingly reduced, and the light curtain reflection is alleviated. Anti-glare problems in the lighting and lighting design of the console room dispatching room. Appropriate illuminance and reasonable illumination distribution. Appropriate illumination on the console room and console panel is to ensure that the duty officer correctly recognizes the signal path on the console panel. And the basic conditions of the road. Reasonable illumination distribution. In addition to having sufficient vertical illumination on the console panel in the console room, it is also required to have no significant difference in brightness around it, so that the entire indoor illumination is evenly distributed. Avoid the watchman's bright window being in the field of view while watching the console and standing. The brightness between the bright window and the darker console panel varies greatly, producing direct glare that affects viewing the console surface.
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