(T) K = t (° C) 273
Light source to pass the color is good or bad is passed by the color coefficient as a quantitative standard. Sunlight pass color factor of 100. Compare objects under the illumination of a light source and the color shown in the sun, such as the closer the color under the sun, then pass the color coefficient is closer to 100, and vice versa is less than 100. Custom Car Window Flags
③ luminous flux, luminous efficiency. The luminous flux is the total energy per second light source to the surrounding emission of visible light, the unit lumen (lm). Light source per consumption launch by the the 1 watts power lumens the number of to referred to as the the the number of of light in of the light source.
The optical properties of the plate photographic light source, such as listed in Table 2-31. Custom Car Window Flags
Table 2-31 plate camera optical properties of the light source
Light source power (W) Flux (lm) the brightness nt luminous efficiency (lm / W), color temperature (K) pass the average life expectancy of the color coefficient (h) use
Sun – 1.6 × 109 5900 100
Incandescent tungsten vacuum 15 100 4 106 2.9 2400 99 1000 darkroom safelight
Inflatable 15 300 4100 × 106 10 ~ 20 2850 99 1000 dry film copy
Bromine halogen tungsten 10020 3234009950 electronic color scanner light source
Dianwu 1000 21000 5 107 27 3200 (high) Cheap Garden Flags For Sale
2800 (middle) 99 50 (H)
1500 () Luodian copy
Infrared light – 2000 500 – 18 – 20 2500K drying Custom Car Window Flags
Fluorescent lamp fluorescent lamp 40 2560 7 103 50 ~ 70 5000 3000 paintings separation, general lighting
800,403,200 ~ 6000 300 ~ 500 tablet electrodeless fluorescent tag through dichroic
Blacklight 40 – 40 – 2000 proofing (Guangmin the resin version)
Graphite and light AC 30 ~ 40V
DC 30 ~ 40V
1000 7 ~ 8 104 80 6000 85 200 metal halide dysprosium holmium light photographic copy Luodian
3000 7 x 104 5.5 x 108 30 ~ 50 6000 94 500 tag through short-arc color separation (point source)
8000 32 × 104 1010 40 6000 95 250 tag through separations of the pulses (tubular)
Strobe (tubular) 80,001,010,560,095 tag through the dichroic
④ photo (copy and proofing) light source, shall meet the following basic requirements:
High luminous intensity, illumination uniformity, thermal radiation, save energy, the environmental temperature and humidity and airflow affect small; emission spectra should include all regions of the visible spectrum; light source spectral power distribution should be adapted to the spectral absorption range of the plate photographic materials; Custom Car Window Flags color temperature , photometric stability; simple structure, convenient operation, low cost, no pollution, no harmful to human health.
The common plate light fluorescent lamp, carbon lamps, xenon lamps, dysprosium lamps, halogen lamps.
a. fluorescent lamps. Also known as fluorescent lamps, the luminous intensity is stable, the spectrum close to sunlight, mainly for photographic color separation. Decorative Garden Flags Wholesale
(b) graphite and light. Also known as arc lamp, is generated by the the used graphite and electrode issued by the electric arc while the glare of the. Its spectrum, light-emitting energy in the violet and UV Ministry for the continuity spectrum, color temperature of 4000 ~ 5000 luminous efficiency of 40 ~ 50lm / W (lumens / watt).
Used graphite and lamp easy to operate and low, the price, but the luminosity is is not stable enough, produce smoke. Issued by the strong ultraviolet radiation, damage the eyes, the operation can not look straight, and should be put on the goggles.
Graphite and lamp suitable for the version of the light source.
c xenon lamp. The xenon lamp is enclosed within the quartz tube xenon glow discharge. A color temperature of 6000, the luminous efficiency of 30 ~ 50lm / W. The advantages are: the lamp is small size, spectral approximation of the solar spectrum, non-smoking, ash-free. Lack: the heat required to set up the air or water cooled device. Custom Car Window Flags
Xenon lamp suitable answer camera separations light.