User manual KONICA MINOLTA CL-200A BROCHURE

[. . . ] Chroma Meter CL-200A Even measures new light sources such as LED lighting and organic EL lighting Ideal for measuring color temperature NEW A compact, lightweight instrument with a detachable receptor. Includes convenient, easy-to-use software. De facto industry standard for measuring color temperature! Compact and easy to carry The CL:200A's compact body fits in your palm. [. . . ] A photographic color meter is a meter used to select the appropriate filters, with the sensitivity of its sensors adjusted to match that of the film or digital camera sensor. In addition, because it uses photographic color temperature, which is calculated based mostly on the blue/red balance of the illumination, large errors may occur if it is used to measure light sources with non-continuous spectrums. [Actual measurement data for daylight-color LED bulb] Measured color temperature Our company's standard instrument Color-temperature difference from standard-instrument measured value 5045 5011 5600 0 -34 555 CL-200A Photographic color meter Color temperature and correlated color temperature Color temperature When an ideal blackbody* is heated, it begins to emit light, and as the temperature increases the color of the emitted light changes from red to yellow to white. Since the color of the emitted light is determined by the temperature of the blackbody, the color of the light emitted by the blackbody can be expressed as the absolute temperature of the blackbody (in Kelvin). For example, a 7000K color would be the color of the light emitted by a blackbody heated to 7000K. Figure 1 shows the color of light emitted by a blackbody at various temperatures plotted on an xy chromaticity diagram. This curve is called the "blackbody locus"; "color temperature" expresses a color on this blackbody locus. Correlated color temperature Since the color of white light emitted by illumination equipment and displays is generally close to the blackbody locus, the color of such light sources is normally expressed using "color temperature". However, the color of such light sources is not directly on the blackbody locus. Because of this, a way to enable similar color expression for colors within a larger region close to the blackbody locus was devised. This is called "correlated color temperature", and the larger region is shown by the isotherms on the xy chromaticity diagram in Figure 2. To accurately express the correlated color temperature of a light-source color, it is necessary to state not only the correlated color temperature but the difference from the blackbody locus, normally in terms of uv. *Blackbody An ideal radiator. A body which completely absorbs all incident electromagnetic radiation. Although a perfect blackbody does not actually exist, coal is a familiar object that acts similarly. Figure 1: Blackbody locus on xy chromaticity diagram Figure 2: Closeup of blackbody locus on xy chromaticity diagram showing correlated color temperature region General Reference Information Measurements in the LED manufacturing process When made from blue LED and phosphor The blue light emitted by the LED mixes with the yellow light emitted by the phosphor to create white light. Colors mix to create white light! Blue light emitted by LED element Yellow light emitted by phosphor Package Electrode LED element Phosphor Problem: Since the spectral emission distribution of the blue light emitted by the LED varies for each unit, variations in the resulting white light will occur. [. . . ] Konica Minolta Sensing Americas, Inc Konica Minolta Sensing Europe B. V. may cause a fire or electric shock. Certificate No : JQA-E-80027 Registration Date : March 12, 1997 Phone : 888-473-2656(in USA), 201-236-4300(outside USA) Nieuwegein, Netherlands Phone : +31(0)30 248-1193 München, Germany Phone : +49(0)89 4357 156 0 Roissy CDG, France Phone : +33(0)1 493-82519 Milton Keynes, United Kingdom Phone : +44(0)1908 540-622 Milan, Italy Phone : +39 02 39011. 425 Dietikon, Switzerland Phone : +41(0)43 322-9800 Västra Frölunda, Sweden Phone : +46(0)31 7099464 Wroclaw, Poland Phone : +48(0)71 33050-01 Shanghai, China Phone : +86-021-5489 0202 Beijing, China Phone : +86-010-8522 1551 Guangzhou, China Phone : +86-020-3826 4220 Chongqing, China Phone : +86-023-6773 4988 Qingdao, China Phone : +86-0532-8079 1871 Singapore Phone : +65 6563-5533 Seoul, Korea Phone : +82(0)2-523-9726 Fax : 201-785-2482 Fax : +31(0)30 248-1280 Fax : +49(0)89 4357 156 99 Fax : +33(0)1 493-84771 Fax : +44(0)1908 540-629 Fax : +39 02 39011. 223 Fax : +41(0)43 322-9809 Fax : +46(0)31 474945 Fax : +48(0)71 734 52 10 Fax : +86-021-5489 0005 Fax : +86-010-8522 1241 Fax : +86-020-3826 4223 Fax : +86-023-6773 4799 Fax : +86-0532-8079 1873 Fax : +65 6560-9721 Fax : +82(0)2-523-9729 Addresses and telephone/fax numbers are subject to change without notice. For the latest contact information, please refer to the KONICA MINOLTA SENSING Worldwide Offices web page : http://konicaminolta. com/instruments/about/network 9242-4876-12 BAGAPKPrinted in Japan ©2010 KONICA MINOLTA SENSING, INC. [. . . ]