The paraboloid of revolution comes from the geometric shape created by paraboloid. If the incident angle on the inner surface of the light collector is equal to the reflection angle, any incident light parallel to the optical axis of the disk surface will be reflected to the focus.
In particular, it refers to a lamp that reflects the light emitted by a light source located at the focus of a reflecting curved lampshade of the lamp and emits it as parallel light. The principle of controlled lighting is the optical characteristics of a paraboloid of revolution.
The paraboloid of revolution is a curved surface obtained by parabola rotating around the central axis, which expands the optical properties of parabola from two-dimensional space to three-dimensional space.
The paraboloid of revolution comes from the geometry created by the paraboloid: if the incident angle on the inner surface of the light collector is equal to the reflection angle, then any incident light parallel to the optical axis of the disk surface will be reflected to the focus.
Because many types of energy can be reflected in this way, a parabolic reflector can collect and concentrate the energy entering the reflector on a special posture. Similarly, the energy radiated from the focal point of the disk can also be transmitted as a light beam parallel to the axis of the disk.
Extended data:
Like many stage lights, the optical characteristics of paraboloid of revolution are applied. Stage lights only appeared on the TV stage in the late 1970s and early 1980s. At first, in some large-scale outdoor concerts abroad, in order to set off the atmosphere, some package lamps (PAR lamps) controlled by motors were used to generate beams that can swing and change color.
Looking back, this may be the prototype of computer lights. As a real computer lamp, it appeared in the middle and late 1980s. With the development of science and technology, especially the rapid development of digital computer technology, computer lamps have developed into today's digital age after the initial analog era transformation.
The first generation of computer lights appeared in the 1980s. With the development of mechanical lighting, light source and electronic technology, the first generation of intelligent lights came out. Early computer lights can only perform some simple actions, and not many colors and patterns can be changed.
In the control mode, due to the early development, the control signals of the first generation lamps have not been unified, and they all adopt different control protocols, so the universality is poor. Due to the limitation of electronic technology and the inconsistency of control signals, most of the first generation computer lights are controlled by the console produced by the manufacturers themselves.
1987, the National Theatre Association of the United States published and unified the control protocol of computer lighting, and 1990 modified the protocol, that is, DMX5 12 communication protocol was still used. Due to the unification of control protocols, computer lamp technology has been further developed.
Some manufacturers with strong electronic technology capabilities specialize in lighting hosts, and some manufacturers with strong processing capabilities specialize in computer lights. With the continuous development of electronic technology, mechanical technology and optical technology, computer lights have entered the second peak of development.
The flicker power is also increased to 1200W, and the horizontal and vertical movement is developed to 16. In terms of color-changing function, in addition to the color wheel has developed to three-color mixed color, the pattern piece has also begun to adopt glass coating process. We call the current computer lamp the second generation computer lamp.
In 2 1 century, people found that DMX5 12 communication protocol has great defects in transmission capacity and transmission mode, such as small amount of transmitted data, one-way transmission only, and multi-console backup is difficult to realize. With the development of computer and IT industry, network control technology has been applied to lighting industry.
The first choice is that the conventional dimming manufacturer has developed the Art-Net network control protocol, so that the lighting control signal can be transmitted in the network, which solves the defect that the DMX5 12 communication protocol can only transmit in one direction. The greatest convenience brought by Art-Net network control protocol to lighting control is that it can transmit data in both directions, and it is very convenient to detect the working condition of lighting equipment and give necessary information feedback.
The real network computer lamp can not only be controlled by network signals, but also be equipped with chips and sensors for monitoring and feedback, and the software can be upgraded at any time through the network. This kind of lamp is the third generation computer lamp being developed today.
Of course, one of the most widely used computer lights is showing a vigorous development trend, which is digital computer lights. It organically combines the digital display part with the computer lamp, and carries out effect processing at different digital levels.