The light beam to transparent lamp lighting engineering materials produce directional transmission

Photometric data derived from the basic photometric data ( Light intensity distribution) N of export, that is, from the lab, the intensity distribution of lamps and lanterns data, after calculation, the processing and the data is called a photometric data derived. Typically include utilization coefficient curve, such as illuminance song



photometric data derived from basic photometric data ( Light intensity distribution) N of export, that is, from the lab, the intensity distribution of lamps and lanterns data, after calculation, the processing and the data is called a photometric data derived. Usually includes utilization coefficient curve graph, such as illumination, brightness graph and brightness, such as graph, etc. These export data in. No conditions and want to use artificial lighting calculation by computer is very useful. At the end of the intensity distribution of lamps and lanterns of expression is discussed before, there is necessary to emphasize two points & quot; : (1) whether intensity table, polar 【 In the plane to take a point O, called pole, bring a ray Ox, called the polar axis, and then selected a length and Angle of the positive direction, Usually take counterclockwise) 。 】 Intensity distribution curve, or the light intensity curve of intensity values, such as inside the lamps and lanterns is fueled by the lamp luminous flux 【 Luminous flux ( luminous flux） Refers to the radiation power of the human eye can feel, it is a band of radiation energy per unit time and the product of the relative rate of visibility of the band. 】 When converted into 100001 in the number of values. The aim is to make these tables and graphs, has nothing to do with the actual optic cage of bulb, so that the performance comparison and selection of all sorts of lamps and lanterns. (2) light intensity table is mainly used for computer calculation, such as light intensity curve used in hand, and polar light intensity distribution curve is mainly used for evaluation of lamps and lanterns, glare calculation and for the classification of lamps and lanterns. The light beam to transparent material to produce directional transmission. Such as transparent material of the surface of the two parallel to each other through the direction of the light and incident direction remains the same, only minor refraction within the material produced.