What is the index on the color rendering and how is the measurement
Title: Lightening 
With a wide variety from modern light fixtures to daily lighting and staining, LED and fluorescent lighting fixtures; The main problems for them and the topic for discussing it are not energy-saving, but index on color rendering and quality on light. This is a parameter that determines comfort to a degree to the extent of comfort when working with artificial light. In the Taji article, we speak for a commodity as representing an index for a color rendering, as a tryabva yes, and how it is measured.
Containment: 1. Definition and historical origin 2. Problems with CRI and negotiation of analosi 3. Index on color rendering on various types of lamps 4. Conclusion
Definition and historical origin
Index on the color rendering value, obtained from the relation to the actual color of the vision or the vision of the color on the object. On the other hand, showing how long you bloom on an object, lighting from an artificial source on light, they will dissuade you from truth. Toy e is kato Ra or CRI, shortened from English. Color Rendering Index, which is literally translated as "Color Rendering Index".
CRI is not in itself a single method for determining the color rendering. It is obligatory to check the manufacturers for the light and check from the producers. This definition appeared around 1960-1970. Until 1974, the color rendering was checked by comparing it to a set of 8 colors, after which 6 additional ones will be added. As a result, when measured by the index (coefficient) on the color rendering, it uses 8 or 14 colors, which are measured in DIN 6169.
In this case, it is necessary to check all the costs in comparing on parity 8 colors from the spectrum, comparing on 14 colors is all wrong, if necessary or for special purposes, but they will not take into account when counting on the index.
Measured by index on color rendering
Index on color reproduction is measured when projecting on a light source. For the purpose of examining the source for light, illuminating the template or table for verification, at the top of the application, standardize the color R1 - R8.
Osventova stoynostta on the colors of all measurements with a special device. Tova giving information for tova how to flower under a certain source.
The next step is to illuminate the template for checking with a reference source for light and take readings from the instrument, and then determine the color.
The following is processing on receive CIE method data and all receiving variance on receive color from the reference.
The coloring of the designation is kato Ri, it is numbered on the colors. Tech names:
- R1 did not die the rose.
- R2 is mustard.
- R3 - light green.
- R4 is light green.
- R5 - turkoaseno
- R6 - sky blue.
- R7 - lilav aster.
- R8 is a cradle.
As a result, you get a number from 0 to 100. Slightly bright, and the index on the color rendering is 100. Kolkoto is obtained in a low way, sensibly, in a bad way, they will flower. Get the values of the can and be divided into degrees, socheni in the table by -dol.
Characteristic on color renderingColor renderingColor rendering indexMuch good1Aove from 90Much good1B80–89good2A70–79good2B60–69Average340–59Losho4Slightly from 39
If so, I’ll add the color of the kum estimate 9 - it’s filled with red.
DIN 5035 descriptions of where lamps can and can be used specifically on color reproduction:
Tsvetno betrayalSomewhere out of the blue1ANA is closed, there is a study of high accuracy on the flowering. Tova itself museums, printers, auto fight shops, art workers, etc. , with exclusion for sodium lamps with high pressure (Ra = 20),
DIN EN 12464-1 defines the type of room and requires an index for color rendering, such as SNiP 23-05-95 in the appendix for this issue.
Problems with CRI and negotiation of analosi
CRI is not faulty in giving accurate readings, in fact, it was originally developed for light sources with an inexpressible spectrum. We speak for the spectrum when svetlin’s byalata, that set is defined from the color, which, as a result, gives a blyak with a certain nuance (color temperature).
Spectral systav on svetlinata - a set from izlchvane with different lengths to vlnata (color) in bright stream… By means of the spectrum, you can determine the degree on the measure of the determined color.
When the source of light is in its own spectral range, having made it visible for a long time, then the spectrum of the senarich is unpretentious. Example:
- sun light;
- lampi with a litter box;
- halogen lamps.
Correspondence to see the color with the truth depends on the fullness of the spectral composition. But not all the lights of the lamp are emitted into a full spectrum.
Fluorescent lamp and imat taka naming spread spectrum. Stay away from the separation of the peaks with different lengths on the line. Ako si remember tov, for some Kazakhs down the mountain, togawa CRI not reflecting the index on the color rendering on takiva lampi correctly.
Reference: Prez 2007The International Commission for bleaching bleaching, which is “... an index on color rendering, developed by the commission [3], is usually not applicable for forecasting on a parameter on color rendering for a set from source to light line, but rather a set including white LEDs “.
This is why, for this reason, pick up the accuracy on the measurement for the light stream of prez 2010, the CQS method, which means Color Quality Scale, or Russian, has been developed more recently. Rock for quality in bloom. But dori tova did not give a full assessment of the quality, that is, on the source for the lightness, ty kato does not foresee the density and tone on the illumination of the object.
And in 2015, all the TM-30-15-th standard appeared, which takes more parameters, namely, in addition to the template in assessing the participation of tone, density and daily objects.
Contrary to this, in one country, the moment in writing in Tazi article, TM-30-15 is not long, but the product does not stop respecting yourself and the manufacturers and checking the product according to the beginnings.
Often, when checking for stability on a scale of CQS and CRI, they give approximately the same results, but in such cases, the result is sometimes TM-30-15 yes, but under normal. An example for measuring on a good color rendering on an LED lamp is described in an article from independent experts:
Nai is probably due to the result of phosphorus, specially chosen for the delay on the test, but still not succesfully color rendering.
Index on color rendering on various types of lamps
Next, let's look at the typical index on the color rendering for different lamps. The index depends on the principle of operation and design, as well as on the components on the used lighting body. Somehow veche spomenachme, slanchevat svetlina se reception for the standard.
Lampi
Contrary to the classic lamps with the light switch being pressed for use in the field for the sake of low efficiency, the color rendering temperature is close to dimly bright, or even close to 100. The temperature is shown by changing the color and IR range of the fuel.
Halogen lampi
The halogen lamp will generate more light power when the consumption for the energy of the cato lamp is switched off from the light switch. Osventova tyakhnoto color reproduction is approximately on the image.
sodium lamps
Sodium caps are used a little for illuminating the premises, some people are working for the horata. Tova se should somehow be on technical problems, for example, bamchashch drosel, long zapalvane and low index on color rendering - 40 Ra. Sodium lamps with a high beam or HPS will be used for lighting on the golem area. For example, for street lighting, for lamps and spotlights. Tova application explains with a high light stream (150 lm / W) and a long operating life of over 25,000 hours. Those are classified as cato gas discharge sources for light. Te imat spread spectrum, with a predominance of red-orange tones.
Contrary to tov, they are also used for looking at plants in the greenhouse and hydroponic systems for the sake of technium spectrum. The industry produces special sodium lamps for plants, in which case they emit a peak in the light spectrum, necessary for growing them.
DRL
Use a Gum Lamp or DRL for use with HPS, with the exception of clarification to plants. The operating temperature is from about 10,000 hours and the temple is light from 70–95 lm / W, and the index for color rendering is up to 40 Ra. Te scho imat naksan is spectral, having changed from blue to blue and ultraviolet light.
Fluorescent lamps
Use fluorescent lamps and compact fluorescent lamps are especially popular before being introduced to the eutiny LED products. The main disadvantage is the need for use on the control equipment, as it is classified spectrally as light-colored, usually changed to the region on color gelatin, but depending on phosphorus, it can be neutral and light-colored fuel.
The index on color rendering on fluorescent lamps is highly dependent on the composition of phosphorus, the range is from 60 to 90 and the higher Ra.
Typical values:
- for tricomponent phosphorus - 80Ra and more;
- for petcomponent phosphorus - 90Ra.
LED lamp
Somehow veche spomenachme, the index on the color rendering on the LED lamp depends on the composition of the phosphorus, some of the curvature of the LED crystallite. Variation index from 80 Ra, good result is 90 Ra. These are used in rooms from any type, to the point of allowing design characteristics.
Conclusion
When choosing a source for a bright light, special attention is paid to the index on the color rendering, so the accuracy of color perception depends on it. This is especially important if you are working with color, such as drawing or choosing lightening for a photo studio. In any case, you can’t, but hurry up from clarification, ty kato is healthy on your eyes, depending on the tov.
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