Stage lighting regulation

As long as you master the color correction rules, you can use a variety of colors to adjust the ever-changing colors. The blending of seasonings is the application of the "color reduction" commonly used in color science. Understand this rule, using the color filter superposition method can call out the various light colors required. The stage lighting superimposes different types of color filters to obtain the various light colors required by light. The stage lighting also uses the rule of “color reduction” of painting color. But it is worth mentioning that the stage lighting not only uses this method, but also must use the "light color addition" method to obtain different light colors. That is, the regularity of the red, green, and blue phases of the three primary colors of light is added to white. If we confuse the law of "light and color addition" with the law of "reduction of color", it is difficult to find a reasonable scientific law from the use of light color. In fact, these two laws are also used in color television and color film photography. The red light and the green light mix to produce yellow light, while the yellow color in the color cannot be matched from the red plus green, and the yellow light mixed with the blue light can produce white light. That is, the primary color red plus the primary colors blue and green produce an intermediate color yellow. This is actually a complementary color, also known as each other. That is to say, when the two kinds of color light are added to produce white cross, it is said that the two kinds of color light are mutually complementary colors, which is also the law of adding white light.

The color of the stage light filter is superimposed on the color of the object, and the color of the light of the two different colors on the stage is mixed with two different color schemes. It is necessary to clarify this. Two different rules, and then familiar with him in the stage stage lighting design practice, in order to get the desired artistic effect.

Discussion on the application of illuminants and color filters in stage lighting

When studying the techniques of using light colors in stage lighting, you must be familiar with the tools used—stage illuminators and color filters. Just as the artist's paintings must be familiar with the performance of paints, pens and canvases, more tungsten lamps are used on the stage. Due to the temperature that the tungsten wire can withstand in the normal life state, it can only emit 2800K light color, and the light color is yellowish. It is suitable for warm color filter, when it is a warm color scene, such as a blue night scene. It is more difficult. The blue component is missing from the light source, so about 70% of the light is lost after passing through the color filter, which reduces the illumination of the light. His color purity is also poor. Since the invention of the tungsten halogen lamp, the color temperature of the light color has reached 3200K. This is almost the limit, and its light color is still warm. If the use temperature of the tungsten wire is increased, the life will be greatly reduced, and there is no use value.

The stage play is the art of the naked eye, but the optic nerve is different from the color film or the TV. The color of the human eye is weak, and the difference in color is not good in the dark light. For example, the dark light of the human eye on the moonlight night is almost color blind. The distinction between color is much lower than that of film and television. The important problem of stage lighting is solved. If the development of gas discharge lamp or metal halide lamp is not used, it is very difficult to improve the brightness and purity of cold light. At present, the dimming (controlling the change of brightness and darkness) of the luminaire using the above-mentioned optical method is not ideal, which limits the use of the voltage drop to cause a warming of the light color when a large number of dimmers are used on the stage. The color (the color temperature is reduced by 10K for every 1V reduction in voltage) particularly affects the dimming of cold tones. For many years, people have studied the use of dimmable fluorescent lamps to solve this confusion. In recent years, three primary color fluorescent lamps using variable frequency dimming optical fiber lines have been used in film and television. The color filters used in stage lighting are now mostly dyed with ester resin (also known as polyester sheet).

Because polyester resin filters are difficult to fade, some foreign theaters that retain the repertoire still retain the habit of using colored glass filters. Stained glass is a combination of certain metals or their oxides in molten glass to produce different colors, and the color does not fall back. This will ensure that the quality of those repertoire shows will not change.