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Category: Smart Phone / Tablet Vykyzvm: nit, Lumen, Lux and Candela what mean?
Many times we come to face the exact meaning of the word is unknown, but it did not make sense for us so that for the exact meaning of which we come to an optimal source of. Simply say, patience, they become familiar with the concepts are not one hundred percent. New section "Vykyzvm" to study these words and deals. In the first section, we will introduce a more accurate measurement units light up when you read reviews of the list of characteristics of different products, bewildered Nshvym of television can be with a light such the projector's.
Or in Persian Candles, Candle 2700k in the past or the English word candle was known, but was later renamed Candela indicates the amount 2700k of light and a light density is talcose. Of course, this unit is turned into the distance or area of communication not only depend on the strength of the light source and the radiation angle. The angle of the light source and the light output is less than the amount 2700k Candela density and intensity of the light will be more to say. Lumen
Lumen projector unit is mainly used to describe the amount of light output is total. Lumen and Candela relationship is very simple. Candela light density Steradian 2700k if the angle of light multiplied by the total amount of light output result. Steradian angle in the three-dimensional normal angle. This means that if the two-dimensional light emission angle of 30 degrees, the angle of the common area of a cone with an angle of 30 degrees and a sphere with a radius of the cone and the top of the butter in one point there. This unit is Steradian angle Ω is displayed. The three-dimensional angle 4π Ksr value is equal to the total area of a sphere with unit radius. In the picture you can see a Steradian. In some cases, 2700k the phrase in the box ANSI Lumen projector specifications listed below in the order of the National Institute of Standards and the Lumen is America.
Brightness level or amount of light shined on it. Lx unit is shown with the split of the level achieved Lumen. Candela is the difference between the distance and the area is connected. The greater the distance from the light source or light Lumen Lux is reduced because of the larger surface is scattered. But the distance is not Candela because the denominator is the definition of a constant angle Steradian. As we define Steradian targeted area light source on a circle with a radius of one meter. So if the desired distance from the light source is 1 meter is equal to the amount of Candela and Lux Lux because the area fraction of the amount will be Steradian. Luminance; nit unit
The unit of division or Candela light density on the surface is achieved and the amount of light emitted from a surface described. The application levels for a total amount of light to create a surface that is why it is used to describe the brightness of the display. This unit Candela as well as the distance from the light source is not related to. It consists of a cd / m 2 is also used as an informal word nit. Each of these units we see the list of Product specifications and descriptions will need to know the meaning exactly. It is not easy to nit relationship with Lux. If you have a flawless reflection (white, without defects) and a light intensity 2700k of 314 lux to shine, light intensity equivalent to a 100 nit display with the ability to publish and will equal brightness. In fact, if the light source such as a projector on a reflective surface shine perfect relationship Lux level nit reflect the resource 2700k as follows. Lux = nit * π
Where do we come to the knowledge of these units? 2700k First, the other with a view to more accurately understand its meaning and, second, that the power compared to a projector will have a TV. It needs to obtain the relation between Lumen and nit.
It needs to know the Lumen projector. 2700k Let's use the example of the projector lovely B1M company Asus. Suppose that the 700 lumen the projector on a 50 inch twisted the equivalent of 0.75 square meters. Lux is the equivalent of the following values: 700 lumen / 0.75 m ^ 2 = 933 lx (Lux)
As you can see, this value is very good and is in the category of Best Television. However, neither television nor the intense light projectors are able to create a good image. You have some interesting numbers have continued to be observed: the power of the light emitted by the screen: 40 to 60 nit power of light emitted by the sun: 32000 nit brightness of the sky: from 2000 to 7000 nit power light the Sun: 1.65 billion nit
And now some other light that reaches the surface of the star: a desire SE Lux or Lumen light that reaches the surface of the full moon: 0.1 lux light from direct solar radiation reaches the Earth: 100 thousand 2700k lux or Lumen B