The Basic Technolegy of Stage Lighting and development

Since the produce of the stage, stage lighting will become a part of the stage. Stage lighting, your outstanding visual realism, aesthetics and performance of the four elements. Gone through years of evolution. Gradually developed into a more perfect and advanced lighting systems. The drama of the first period of prosperity in ancient Greece 2,000 years ago. At that time the theater are open or semi open-air. The stage lighting by heaven, it’s enormous "light" - the sun, it can only be performed during the day. While at night for recreation needs, open-air performance is susceptible to weather the impact of the objective drawbacks and drama development stage lighting has become the people must be addressed. 
Performance lighting design, based on the processing stage lighting properly marked by. Stage lighting not only to illuminate the actor and the audience to see the facial expressions, demeanor and actions, is more important is to make full use of lighting technology, and to mobilize the means of lighting operation to strengthen the artistic effect, the feeling to the audience. 
Stage lighting effect produced by the computer lights and other lighting combinations King film by a different shape, different color changes, a different perspective, horizontal, vertical light angle changes and the speed of strobe speed, aperture size changes The overall performance of the focal length changes. So, you must understand before the stage lighting technology to master these basics: 
First, the visible light  Electricity alone, the radiant energy form of electromagnetic waves propagation. A wide wavelength range of electromagnetic radiation, only the wavelength in this part of the 380 ~ 760nm radiation can cause light vision, known as visible light. Wave length 380nm the light is ultraviolet, x-rays, γ rays; longer than 760nm light is infrared, radio waves, the human eye does not produce light vision, that is, invisible. Therefore, the energy of light is an objective existence, and with people’s subjective feelings are closely linked. 
Second, the classification of color 
The color can be divided into non-color and color two categories. The non-color white, light gray, gray to dark gray, until the black is called white and black series. White is the ideal full light reflected from objects, the reflection rate of 1; black is the ideal non-reflective objects, the reflection rate is 0. Therefore, the non-color white and black line represents the object light reflectance changes. We know that the light reflectance and the brightness is proportional to the indoor white walls and ceiling you can get a higher brightness. The color refers to a variety of colors other than white and black series. Color has three properties: hue, lightness and saturation, known as the three elements of color. 
The tone is said to show color. Is the name of the variety of different colors such as red, green, and blue. It is the wavelength of light. Brightness (luminance) is the brightness of said color. The different shades of brightness are different, even if the same hue due to the nature of the surface and the intensity of light will produce light and dark shades of difference. If the same yellow, can be light yellow, yellow, dark yellow. 
Saturation (chroma) color shades (shades), it can be said that the extent of the purity of color, bright. Saturation, the higher the color depth (thick), visible in a variety of monochromatic light is the most saturated color. When more spectral color mixed with white, the more unsaturated. Such as red light than the pink shade of saturation, because the pink shade mixed with white. In general, the same tone, the brightness changes, the saturation change, but the lightness of the increase or decrease its saturation are reduced, only lightness moderate saturation (purity) was the largest. However, the impression is always always lightness color looks bright. 
Third, the three primary colors and color 
Red, green, and blue are called primary colors. The three colors are mixed in different proportions to produce a variety of colors. There are two basic ways to color mixing: additive color mixing and the mixing of the subtractive method. 
The so-called additive color mixing is the different colors of light mixed, their respective share of the spectrum part together, resulting in a new mixed-color method. Show that light to increase the purity of color mixed relationship. Red, green, blue three primary colors of light equal mixture of:   
Red + green = yellow green + blue = glaucoma 
Green + red = red product red + green + blue = white 
If the mixing of the different amount of the three primary colors of light, you can get a variety of intermediate colors, such as: 
More red + green = orange light 
Red + blue = pink light 
The subtractive mixing different colors mixed with their respective incident light in the selective absorption in the spectrum, they share the corresponding part of the produce the color effect of a synthetic method. If any two shade sum to produce white light, the two shade called each other to complement the shade (complementary color). Such as yellow and blue are complementary colors, blue and red are complementary colors, magenta and green each other’s complementary color. Therefore, yellow, cyan, magenta, respectively referred to as less blue and less red, less green, that is three kinds of complementary colors are subtracted from white light from a corresponding primary colors. Yellow, cyan, magenta can be called the subtractive primaries. 
When the yellow, magenta, green, the three subtractive primary colors overlap will produce black. In the process of the subtractive method, the density changes of the three subtraction colors control red, green, and blue absorption ratio to arrive at a variety of mixed colors, the same effect can be achieved with the additive color mixture. 
Fourth, the color and visual 
The colors give a sense of human well-being, sense of distance, size, sense and tact, and often makes them the association, to form a different psychological effect, these are long-term formation of visual habits. 
The color can usually be divided into three categories of cool, warm and neutral colors (intermediate colors). Cold and warm colors is a visual response caused by a variety of colors and the psychological association division. The red brings to mind the heat of the fire to generate warmth, known as warm. Blue reminiscent of the cold water, gives a sense of cold, so called cool. Purple, green is not cold and warm neutral color. The different colors can affect the size of the object appearance. If objects of different colors of the same size together, will have a light white objects in the visual sense. The dark objects is small. In general, the white object looks the biggest black object looks yellow color objects, followed by green, red, blue. 
Visual habits of people of color will produce a sense of distance. Objects of different colors at the same distance gives a visual experience. The warm color gives a feeling of moving forward, cool it is to back away from the feeling. And the color gives the sense of distance is also affected by the impact of the background color. For example, white background, blue, it seemed at close; a black background, red looks Recently, followed by orange, yellow, green, blue, purple. The use of this feature can help us to create a color stereoscopic illusion of distance. 
The severity of the color sense is also a vision of long-established habits. Is generally believed that white the lightest, the heaviest black. In the three primary colors of light, the lightest green, blue is the most important, the red center. Equal mixture of two primary colors of light the color, with light color look lighter, containing heavy colors seem heavy. The color sense of the weight is shown not only by the brightness and purity, but also by the occupy an area the size of the impact of color in the picture. The area seemed heavy and to attract people’s attention than the small size of the color more.