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- Time：2017/3/20 Posted：Shenzhen Meizhen Lighting Equipment Co., Ltd.
- ------- through the visual organs can cause visual radiation. Its wavelength range is 380--780NM
2, light-emitting point ------- light source for the light emission point.
3, the beam ------- have a certain light collection.
4, luminous intensity ------- point light source to observe the direction of the small solid angle emitted within the luminous flux divided by the solid angle element. (Unit: candela candela, referred to as cd)
5, luminous efficiency ------- consumption of 1 watt of electricity emitted by the luminous flux (Im / w) known as luminous efficiency, referred to as light efficiency. This is an important data for evaluating various electric light sources. Ordinary white light effect is about 10Im / w, and high pressure sodium lamp light efficiency up to 100Im / w.
6, color or color ------- with the spectral components of light corresponding to the visual effects.
7, lighting ----------------- light irradiation as a means of people's lives, activities for the purpose of the method, including the use of light to see the object and its surrounding, With light to generate signal transmission of information, with light to produce an atmosphere to change people's feelings and so on.
8, brightness ---------------- brightness refers to a certain surface around a certain micro-unit area, in a given direction to launch or reflect the luminous intensity divided by the unit projection To the area in the same direction, the unit is cd / cm2. Light system, the general will not encounter the concept of brightness.
9, illumination --------------- Illumination refers to the light density in a face, it is injected into the unit area of the luminous flux, the unit is LX. The definition and measurement of illumination are complex, such as average cylindrical illumination, equivalent spherical illumination, scalar illumination, etc., and their measurement conditions and calculation methods are different. In the construction and decoration works often encountered, the lighting system is also occasionally involved in the concept of illumination. The grading criteria for illuminance are: 0.1,0.2,0.5,1,2,3,5,10,15,20,30,50,75,100,150,200,300,500,750,1000,1500,2000LX.
10, luminous flux ---------- luminous flux is the light source in the unit time away from the surrounding space radiation, can cause visual energy, that is, visible energy. It describes the effective radiation value of the light source, the unit is lm / watts, and metal halide lamp can reach 80lm / watt.
11, color rendering (color) ----------- light source to the object revealed by the color is called the light of the color rendering, that is, whether the light source can accurately show the performance of the object color. People are accustomed to the sun with all the shades to distinguish the color of the object, so the daylight or sunlight with the artificial light source as the standard, the best color rendering, color rendering index of 100 to represent. Colored objects by a light source of the effect of exposure with the standard light source is close to that the light source is good color rendering, color rendering index is high; the other hand, the object after the color distortion, then that color is poor, color rendering index on the end. Fluorescence high-pressure mercury lamp spectrum and sunlight close to, but its spectral energy and daylight difference is very large, its spectrum in the green, blue .. green and very little red, according to the face hair gray, poor color. In the stage lighting, daylight and halogen lamps have good color rendering. Practice Table incandescent and halogen tungsten color rendering index of 97 --- 99, xenon lamp color rendering index 94, these light sources for color lighting can achieve the normal effect of color reproduction.
12, color temperature ---------- color temperature is the light emitted by the light source color, that is, a standard black body heating, when the black body temperature rises to a certain temperature when the color from the deep red → light red → orange → white → blue and white → blue, gradually change. With this light color change we will light source color and black body color is the same, the black body temperature is called the color temperature of the light source, generally in absolute temperature K units. Such as 3200K and 5600K and so on. Color temperature is high, such as 3000K when the color of the light reddish, giving a warm feeling; color temperature higher than 5000K when the light color blue, light color is cold, gives a cold feeling; moderate color temperature, light close to white The Natural normal sunshine, the color temperature of light is generally higher than the color temperature of artificial lamps. Under normal circumstances, the color temperature of the sun is about 5600K, while the studio and performance lamps with color temperature are around 3200K (hot light source).
candle
1930K
Incandescent lamp
2600-2900K
fluorescent lamp
5500-6000
Sunset, sunset
2000-3000
moonlight
4000
Noon sunshine
5000-5400
cloudy day
6800-7500
Blue sky
19000-25000
Halogen tungsten lamp
3300-3400
Composite metal halogen lamp
5500-5600
Carbon arc lamp
6000
13, the brightness ---------- seen from a direction of the object to reflect the intensity of light, that is, the eyes from a certain direction to see the intensity of the object reflected light. Brightness (Luminance, L) Unit: Candela per square meter (cd / ㎡) A light source or a surface of the brightness refers to the unit surface in a certain direction of the light intensity density, can also be said that the human eye perceived the light Or to be illuminated.
14, grayscale - grayscale uses black tones to represent objects. Each grayscale object has a luminance value from 0% (white) to 100% (black). Images generated using black and white or grayscale scanners are usually displayed in grayscale. Use grayscale to convert color artwork to high quality black and white artwork. In this case, Adobe Illustrator discards all the color information in the original artwork; the gray level (shadow) of the conversion object represents the brightness of the original object. When converting a grayscale object to RGB, the color value of each object represents the gray value before the object. You can also convert a grayscale object to a CMYK object. The average gray scale of most objects in nature is 18%. At the edge of the object presents grayscale discontinuity, image segmentation is based on this principle.
15, gray color - refers to the pure white, pure black and a series of the transition from black to white color. We usually say that the black and white photos, black and white TV, in fact, should be called gray-scale photos, gray-scale TV is accurate. Gray color does not contain any hue, that is, there is no red, yellow color. The usual representation of grayscale is the percentage, ranging from 0% to 100%. Photoshop can only enter integers, allowing you to enter fractional percentages in Illustrator and GoLive. Note that this percentage is based on pure black as a percentage. Contrary to RGB, the higher the percentage, the darker the color, the lower the percentage, the more vivid the color. The highest gray is the highest black, that is black. Gray minimum is equivalent to the lowest black, that is, "no black", that is pure white. Although the gray level of a total of 256, but because of Photoshop's gray scale slider can only enter the integer percentage, so in fact from the gray scale slider can only choose 101 (0% is also considered a) gray. We can see the following: 0% gray RGB value is 255,255,255; 1% gray value of the RGB value is 253,253,253; 2% gray scale RGB value (Figure), you can see in the gray scale slider to increase the value and then switch to the RGB slider view, you can see: For 250,250,250. In other words, 252,252,252 such a grayscale can not be selected with Photoshop's gray scale slider. In contrast, Illustrator's grayscale allows you to enter two decimal places, greatly improving the accuracy of color selection.
16, the relationship between gray and pixels - pixel value is quantized with a byte (8b) to represent. If the black-gray-white continuous changes in the gray value is reduced to 256 gray levels, gray value range of 0 to 255, that the brightness from deep to shallow, corresponding to the color of the image from black to white. Black and white photos contain all the gray and gray between the black and white, each pixel value is between black and white 256 kinds of gray between one.
17, the average life expectancy ----- refers to a number of light bulbs continue to intermittent, to the number of fifty percent when the number of damage is not bright.
18, economic life ----- in considering the bulb damage and beam output attenuation conditions, the integrated beam output attenuation to 80% of the number of hours.
19, channel ---------- In modern lighting control, the new generation of a channel concept. It refers to a collection of control loops on a fixture. Specifically, the function of a fixture needs to be controlled separately (eg, focus, strobe, discoloration, etc.), and the dubbed output circuit is the channel.
17, DMX512 digital signal ------- it is a serial digital encoded signal, due to the use of more and more widely, it gradually become a light control signal to the existing transmission bit rate and signal processing Capability, which can transmit optical output signals to 512 optical paths. When using the DMX512 digital signal, it is necessary to use the terminal at the end of the signal line in order to ensure accurate signal transmission.
18, IP rating statement:
The degree of protection indicated by the first marked characteristic number (number)
(0): no protection against the outside world or no special protection.
(1): to prevent more than 50mm of solid objects to prevent the body (such as the palm of your hand) due to accidental access to the interior of the lamp parts. To prevent large size (diameter greater than 50mm) of foreign objects intrusion.
(2): to prevent more than 12mm of solid objects into the prevention of human fingers to contact the interior of the lamp to prevent medium size (diameter 12mm) of foreign objects intrusion.
(3): to prevent more than 2.5mm of solid objects to prevent the diameter or thickness of more than 2.5mm tool, wire or similar details of small objects intrusion and access to the interior of the lamp parts.
(4): to prevent more than 1.0mm of solid objects into the prevention of diameter or thickness of more than 1.0mm tool, wire or similar details of small objects intrusion and contact with the interior of the lamp parts.
(5): dust completely prevent foreign invasion, although not completely prevent the dust into, but the amount of dust will not affect the normal work of the lamp.
(6): dust completely prevent intrusion of foreign objects, and can completely prevent dust from entering.
The second indicates the degree of protection referred to by the characteristic number (number)
(0): no protection without protection.
(1): to prevent drip infiltration of vertical drops of water droplets (such as condensate) on the lamp will not cause harmful effects.
(2): 15 degrees can still prevent the infiltration of water when the light from the vertical tilt to 15 degrees, the drip on the lamp will not cause harmful effects.
(3): to prevent the spray of water into the rain, or to prevent the vertical angle of less than 60 degrees with the spray of water into the lamp caused damage.
(4): to prevent the splash of water intrusion to prevent the direction of the splash of water into the lamp caused damage.
(5): to prevent the injection of water intrusion to prevent their respective directions from the nozzle of the water into the lamp caused damage.
(6): to prevent the invasion of large waves installed on the deck of the lamps and lanterns, to prevent the invasion caused by the waves into the damage.
(7): to prevent flooding when the water into the lamp immersed in water for a certain time or water pressure below a certain standard to ensure that no damage caused by water.
(8): to prevent submerged water intrusion lamps indefinite sinking in the designated water pressure conditions, to ensure that no damage caused by water.
In addition to the above two digits, there are 2 optional letters:
Additional letters: prevent access to dangerous parts
A hand back B finger C tool D metal wire
Supplementary letters: specifically supplemented by the information
H High-pressure equipment M Water-proof test Sample run S Do waterproof test Sample static W Climatic conditions.
