在剧场中一般均布置一定种类的舞台灯光，比如面光、耳光、侧光、顶光、天幕光等。而面光是很常见的，也是必不可少的，这不仅是因为面光与剧场建筑布置的关系更密切，而且是塑造演员形象的主要投射光源。下面小编就来讲讲
山东舞台灯光中的面光设计的技巧。
In the theater, certain types of stage lights are generally arranged, such as face light, ear light, side light, top light, and sky light. And surface light is very common and essential, not only because it is more closely related to the layout of theater buildings, but also because it is the main projection light source to shape the image of actors. Next, Xiaobian will talk about the skills of surface light design in Shandong stage lighting.
1.面光的定义。
1. Definition of surface light.
面光是指舞台表演区前半部的正面投射，其位置设在观众厅前区的上部，即所谓的面光桥。一般合适的投射角为&濒别;45&诲别驳;，也即舞台前区台面与舞台口上缘的高度与面光桥舞台前区等距。由于受到限制，大也不应超过55&诲别驳;投射角，否则会影响演员脸部效果及表情。
The surface light refers to the front projection of the front half of the stage performance area, which is located at the upper part of the front area of the auditorium, which is the so-called surface light bridge. Generally, the appropriate projection angle is ≤ 45 °, that is, the height between the table top of the front stage area and the upper edge of the stage opening is equidistant from the surface light bridge to the front stage area. Due to restrictions, the large projection angle should not exceed 55 °, otherwise the actor's face effect and expression will be affected.
2.面光的设置。
2. Setting of surface light.
面光的数量及布置的水平宽度，应与剧场舞台的台口宽度相当，间距可在0.8米词1.5米之间，即一道面光根据照度要求可由8词20只灯具组成。考虑到舞台前区的大小，可设置1词2道的面光。
The number and horizontal width of the surface light should be equal to the width of the entrance of the theater stage, and the spacing can be between 0.8m and 1.5m, that is, a surface light can be composed of 8-20 lamps according to the illumination requirements. Considering the size of the front area of the stage, 1 ~ 2 surface lights can be set.
3.面光所用的灯具。
3. Lamps for surface lighting.
由于面光的投射距离较远，一般在10词20米，因此一般选用大功率的回光灯或聚光灯，常见的是以2碍奥的石英泡作为光源的舞台回光灯。此类灯具，均设有反光碗，可变焦机构，随不同距离，其投影光斑可变。
Since the projection distance of surface light is relatively long, generally 10-20 meters, high-power return lights or spotlights are generally selected, and stage return lights with 2kW quartz bubbles as the light source are common. Such lamps are equipped with reflective bowls and zoom mechanisms, and their projection spots can be changed with different distances.
4.面光桥设置。
4. Setting of surface light bridge.
前述，面光桥的位置（水平）一般与舞台面到面光桥垂直高度等距，目的是保证投影角度为45&诲别驳;左右。在造型上，与观众厅顶棚一致，形成自然过渡。
As mentioned above, the position (horizontal) of the surface light bridge is generally equidistant from the vertical height from the stage surface to the surface light bridge, so as to ensure that the projection angle is about 45 °. In terms of shape, it is consistent with the ceiling of the auditorium, forming a natural transition.
当有2道面光时，间距应在2词3米之间，面光桥的投射口宽度应不小于1米，投射口应设置金属网，以防坠物伤人。在面光桥内部相近于灯具安装处，应设置工作通道，并与舞台天桥相通，便于工作人员安装、操作、维护。
When there are two surface lights, the spacing should be between 2 and 3 meters. The width of the projection opening of the surface light bridge should not be less than 1 meter. The projection opening should be set with metal mesh to prevent falling objects from hurting people. In the interior of the surface light bridge, close to the installation of lamps and lanterns, a working channel shall be set and connected with the stage overpass to facilitate the installation, operation and maintenance of staff.
由于灯具发热量较大，面光桥须通风散热良好，附近的材料须是防火的。
Due to the large heating capacity of the lamps, the surface light bridge must be well ventilated and heat dissipation, and the materials nearby must be fireproof.
5.面光桥与扩声声场。
5. Surface optical bridge and sound reinforcement field.
由于面光桥是内置的，这种造型处理，对扩声声场的分布会产生影响。这种影响是两方面的。一方面，在剧场扩声中，常采用舞台口上方布置音桥的方式，对观众厅的中、后区馈送直达声。
Because the surface optical bridge is built-in, this modeling process will have an impact on the distribution of the sound reinforcement field. This influence is twofold. On the one hand, in theater sound reinforcement, a sound bridge is often arranged above the stage entrance to feed direct sound to the middle and rear areas of the auditorium.
由于音桥与面光桥的垂直高度互相牵制，有可能使能面光桥过低，阻挡了音桥中的音箱直接向后区的辐射。另一方面，由于面光桥的存在，影响了声反射板的布置，导致观众厅的近次反射声场发生变化。这就需要与声学一同考虑解决。更多注意事项就来网站
咨询吧！
Because the vertical heights of the sound bridge and the surface optical bridge restrict each other, the energy surface optical bridge may be too low, blocking the direct radiation of the speakers in the sound bridge to the rear area. On the other hand, the existence of the surface optical bridge affects the arrangement of the acoustic reflection plate, resulting in changes in the near-field reflected sound in the auditorium. This needs to be considered and solved together with acoustic experts. More precautions come to the website Consult!
