Glancing Light 临界光的影响
Glancing light, also known as critical light, emerges when light strikes a plasterboard surface at a sharp angle. This creates shadows that accentuate any irregularities on the surface. As a result, plasterboard walls and ceilings may appear uneven, with joints becoming more noticeable.
临界光（或称为掠射光）是指当光线以较小入射角照射石膏板表面时形成的特殊光学现象。此时形成的阴影会放大表面细微的不平整，导致石膏板墙面和天花板出现视觉上的凹凸感，并使接缝更加显眼（如下图所示）。
Consideration to Minimise Glancing Light 考虑减少临界光的影响
It is essential to consider ways to minimize the effect of glancing light during the design phase. This allows for effective choices that can significantly reduce its impact.
在设计阶段，考虑如何将掠射光的影响降至最低是至关重要的。通过科学的材料选择与施工方案设计，可有效降低这种光学效应带来的视觉干扰。
During the design phase, it is essential to consider ways to minimize the effect of glancing light. This allows for effective choices that can significantly reduce its impact.
石膏板墙和天花板的安装也应考虑在内，因为不同的设计和施工方案会显著影响最终呈现效果。
- Different design and installation options can have a profound effect on the appearance of plasterboard surfaces.
不同的设计与安装方案会显著影响石膏板表面视觉效果。 - Running the long joints of the plasterboard parallel to the direction of light can mitigate the effects of glancing light.
将石膏板长边接缝顺光方向铺设（即与入射光线平行），可有效减弱掠射光造成的视觉干扰。
Utilizing longer sheets of plasterboard can also decrease the number of butt joints.
此外，采用加长型板材能减少接缝数量，从而提升表面整体性。
Artificial or Natural Light 人造光或者自然光的影响
Methods to minimise glancing / critical lighting effects from artificial lighting sources 减少来自人造光源的临界光照影响的方法
The following lighting schemes will provide soft light and reduce the visibility of surface unevenness:
以下照明方案将提供柔和的光线，减少表面不平整的可见性：
• Use shaded batten holder light fittings and ceiling-mounted pendant lights.
阴影板条支架灯具和天花板吊灯
• Consider embedded ceiling lights, like downlights and recessed fluorescents, but avoid installing them close to walls if they cause critical light.
嵌入式天花板灯，如筒灯和嵌入式荧光灯。如果它们会导致临界光，则不应靠近墙壁安装。
• Consider using more low-intensity lamps at fixed intervals and ensure that the illuminated areas overlap. This will improve the environment, reduce the visible impact of visible light, and minimize the shadows that might be generated by single rows or single light sources.
考虑在固定的间隔使用更多低强度的灯，并确保照明区域重叠。这利于改善环境，减少可见光的可见影响，并最大限度地减少可能由单排或单个光源产生的阴影。
• For feature lighting like spotlights, allow the light to hit the surface at a large angle of incidence in order to minimize the highlighting of imperfections.
对于像聚光灯这样的特色照明，允许光线以较大的入射角照射到表面，以尽量减少瑕疵的凸显。
• In a space with generally low levels of light, do not place a single or isolated unshaded light source close to the wall or ceiling.
在整体光线水平较低的空间中，不要将单个或孤立的未遮光光源靠近墙壁或天花板放置。
• Do not use uplights, wall-washers and spotlights in the smooth areas of the wall to eliminate light being emitted at a glancing angle to the surface.
避免在墙面平滑的区域使用上照灯、墙面洗墙灯和聚光灯，以防止光线以掠射角照射到表面。
• A better approach is to install fluorescent lights about 450mm above the ceiling to achieve a more even distribution of light.
更好的是将荧光灯安装在天花板下方约 450 毫米处，因为这样会使光线分布更均匀。
• When installing ceiling mounted fluorescent lights, it is recommended to position the light fittings over the long edge joints. Refer to the following illustration.
在安装吸顶式荧光灯时，建议将灯具定位在长边接缝之上。请参阅下图正确示意图。
Methods to minimise glancing / critical lighting effects from natural lighting sources 减少自然光源造成的临界光照效果的方法
• Do not install window glass up to the ceiling.
不要将窗户玻璃安装到与天花板同高。
• Refrain from situating windows or glass doors directly next to the wall’s end.
避免将窗户或玻璃门紧挨着墙边。
• Provide sun shades over the windows and glass doors.
在窗户和玻璃门上安装遮阳帘。
• Set the windows as recessed ones to prevent direct sunlight from shining on the walls.
将窗户设置为嵌入式，以避免阳光直射到墙壁上。
Related Topics 相关内容
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