在劇場中一般均布置一定種類的舞臺燈光，比如面光、耳光、側光、頂光、天幕光等。而面光是很常見的，也是必不可少的，這不僅是因為面光與劇場建筑布置的關系更密切，而且是塑造演員形象的主要投射光源。下面小編就來講講
山東舞臺燈光中的面光設計的技巧。
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.面光的定義。
1. Definition of surface light.
面光是指舞臺表演區前半部的正面投射，其位置設在觀眾廳前區的上部，即所謂的面光橋。一般合適的投射角為≤45°，也即舞臺前區臺面與舞臺口上緣的高度與面光橋舞臺前區等距。由于受到限制，大也不應超過55°投射角，否則會影響演員臉部效果及表情。
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.面光的設置。
2. Setting of surface light.
面光的數量及布置的水平寬度，應與劇場舞臺的臺口寬度相當，間距可在0.8米~1.5米之間，即一道面光根據照度要求可由8~20只燈具組成。考慮到舞臺前區的大小，可設置1~2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.面光所用的燈具。
3. Lamps for surface lighting.
由于面光的投射距離較遠，一般在10~20米，因此一般選用大功率的回光燈或聚光燈，常見的是以2KW的石英泡作為光源的舞臺回光燈。此類燈具，均設有反光碗，可變焦機構，隨不同距離，其投影光斑可變。
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.面光橋設置。
4. Setting of surface light bridge.
前述，面光橋的位置（水平）一般與舞臺面到面光橋垂直高度等距，目的是保證投影角度為45°左右。在造型上，與觀眾廳頂棚一致，形成自然過渡。
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.
當有2道面光時，間距應在2~3米之間，面光橋的投射口寬度應不小于1米，投射口應設置金屬網，以防墜物傷人。在面光橋內部相近于燈具安裝處，應設置工作通道，并與舞臺天橋相通，便于工作人員安裝、操作、維護。
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.
由于燈具發熱量較大，面光橋須通風散熱良好，附近的材料須是防火的。
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.面光橋與擴聲聲場。
5. Surface optical bridge and sound reinforcement field.
由于面光橋是內置的，這種造型處理，對擴聲聲場的分布會產生影響。這種影響是兩方面的。一方面，在劇場擴聲中，常采用舞臺口上方布置音橋的方式，對觀眾廳的中、后區饋送直達聲。
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.
由于音橋與面光橋的垂直高度互相牽制，有可能使能面光橋過低，阻擋了音橋中的音箱直接向后區的輻射。另一方面，由于面光橋的存在，影響了聲反射板的布置，導致觀眾廳的近次反射聲場發生變化。這就需要與聲學一同考慮解決。更多注意事項就來網站
http://www.zkvd.cn咨詢吧！
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 http://www.zkvd.cn Consult!
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