- 1. Visible light
- 2. Classification of colors
- 3. Three primary colors and color matching methods
- 4. Color and Vision
The basic knowledge you need to know about stage lighting technology
Table of Contents
Stage lighting is important to highlight the four elements of vision, realism, aesthetics and performance. After years of evolution, it has gradually developed into a relatively complete and advanced lighting system today. Stage lighting is an artistic creation that performs a full range of visual lighting design on characters and specific scenes according to the development of the plot, and reproduces the design intention to the audience in visual form.
Stage lighting is mainly the effect produced by the combination of computer moving head light，laser lights and other stage lighting. It is through different modeling scenes, different color changes, different viewing angles, changes in horizontal and vertical light angles, speed speed, strobe speed, and aperture size. Changes, focal length changes and other comprehensive visual effects. Therefore, you need to master these basic knowledge before understanding stage lighting technology:
1. Visible light
Light is radiant energy that travels electrically in the form of electromagnetic waves. The wavelength range of electromagnetic wave radiation is very wide, and only the radiation with a wavelength of 380-760nm can cause light vision, which is called visible light. Light with a wavelength shorter than 380nm is ultraviolet light, x-rays, gamma rays. Light longer than 760nm is infrared rays, radio waves, etc. They cannot produce light vision to the human eye, that is, they cannot be seen. Therefore, light is an objectively existing energy and is closely related to people's subjective feelings.
2. Classification of colors
Color can be divided into two categories: non-color and color. Achromatic refers to from white, light gray, gray to dark gray, until black, called white and black series. Pure white is an ideal perfectly reflective object with an albedo of 1. Pure black is an ideal nonreflective object with a reflectivity of 0. Therefore, the non-color white and black series represent the change of the reflectivity of the object to light. We know that the light reflectance is proportional to the brightness, and the white walls and ceilings in the room can get higher brightness. Color refers to various colors other than the white and black series. Color has three characteristics: hue, lightness and saturation, known as the three elements of color.
3. Three primary colors and color matching methods
Red, green, and blue are called the three primary colors. These three colors are mixed in different proportions to produce various colors. There are two basic methods of color mixing: additive mixing and subtractive mixing. The so-called additive color mixing is that when different colors of light are mixed, they add their respective parts in the spectrum together to produce a new method of mixing colors. Subtractive color mixing is a method in which when different colors are mixed, each of them selectively absorbs the corresponding part of the spectrum they occupy from the incident light, thereby producing a synthetic color effect. If any two shades of light are added together to produce white light, the two shades of light are called complementary shades (complementary colors). When the three subtractive primary colors of yellow, magenta, and cyan overlap, black is produced. In the process of the subtractive color method, the density changes of the three subtractive primary colors control the absorption ratios of red, green, and blue respectively, so that various mixed colors can be obtained, which can achieve the same effect as the additive color method.
4. Color and Vision
Colors can give people a sense of warmth, distance, size and weight, and often make people associate them, thus forming different psychological effects. These are people's long-term visual habits. Colors can generally be broken down into three categories: Cool, Warm, and Neutral. The coldness and warmth of colors are divided according to the visual responses and psychological associations caused by various colors to people. Red makes people think of the heat of fire, which creates a sense of warmth and is called a warm color. Blue makes people think of cold water and gives people a feeling of coldness, so it is called cool color. Purple and green are neither cool nor warm colors are neutral colors.