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The quality of lighting design is mainly measured by the quality of lighting. The following indicators of lighting quality should be comprehensively considered and properly dealt with in the design of lighting: illumination, luminance distribution, uniformity of illumination, shadow, glare, color of light, stability of illumination, etc. (1) Illumination level The solar energy environment should […]
In lighting engineering, it is very important to choose appropriate lamps and lanterns. In the selection of lamps and lanterns, we should comprehensively consider various factors, including the efficiency of lamps and lanterns, the light distribution characteristics of lamps and lanterns, the use of the environment, the light maintenance performance of lamps and lanterns, etc. […]
1.Mode of lighting Lighting equipment can be divided into four categories according to the way it is installed and the functions it performs. (1)General lighting Usually set for lighting the whole environment, the uniform distribution of lamps in the whole place is called general lighting, general lighting can obtain more uniform horizontal illumination. For the […]
When the surrounding environment changes light and dark, the visual state of the human eye also changes. In the bright environment of brightness greater than 3CD/m2, the pupils of human eyes are small, and the visual originated from the center of the orthopedic (central vision). At this time, the human eye can distinguish the details […]
Color temperature related color temperature from the spectral energy distribution and color of the light source can be introduced into the color temperature, which represents the color of the light source. When the color of light emitted by the light source is the same as the color radiated by the black body at a certain […]
The light emitted by various sources shows various colors due to the difference in spectral power distribution. Everything in the world has different spectral reflectance (or transmittance), which is why nature appears colorful in the light of the sun. How to express the color of light sources and objects, the following two systems are introduced. […]
colorAccording to the International Commission on Illumination (CIE) publication “Colorimetry” and the Chinese National Standard GB 5698 “Color Terms”, color is an attribute of visual perception, which can be used in white, black, gray, yellow, red, green and other color names to describe. The light source color refers to the color of the light emitted […]
Luminous flux ф light source in the unit time to emit light is called the luminous flux of the light source, expressed with ф, the unit is lumen (LM). It is a light-2 solar LED luminescence system metric derived from the effect of radiation on a standard observer. For bright vision, if the spectral radiation […]
When light passes through the smooth interface and enters the second medium, it will change direction according to the following rules: the incident ray, the refracted ray, and the interface normals passing through the incident ray and the point of incidence are all in the same plane; as shown in Figure 1, if the incident […]
①Regular reflection and specular reflection (regular reflection, specular reflection) The reflection generated on a smooth interface is called specular reflection, also known as regular reflection. As shown in Figure 1, an incident ray will generate a reflected ray, and the relationship between them is as follows: the incident ray, the reflected ray, and the interface […]