Device for measuring color density
A technology of color and density, applied in the direction of printing equipment, optics, instruments, etc., can solve the problems of self-oxidation, LED is not completely sealed, etc., and achieve the effect of solving aging
Inactive Publication Date: 2007-07-25
上海伟盟软件科技有限公司
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However, the LED is not completely sealed. After the LED passes through the current, it will have the problem of self-oxidation.
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[0031] The working method of the present invention is: through the CPU (single-chip microcomputer C8051F310) to control the LED light source of three colors, the LED is irradiated on the point to be measured, and the light reflected by the point to be measured is transmitted to the photoelectric conversion chip TLS230R-E10 through the optical fiber, thereby being converted into Pulse signal. The CPU detects and saves the pulse signal, processes the pulse data according to the optical calculation formula and the correction algorithm formula, obtains the density value, and finally transmits it to the user's computer through the chip CP2102.
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A measurement device of color density is prepared for setting up LED light source with three colors of red and blue as well as green, shining three colors onto position to be measured separately, transmitting reflection light from measured position to photoelectric conversion circuit to convert light signal to be electric pulse signal being sent to CPU chip of monolithic computer for carrying out data treatment there and then obtaining color density value.
Description
technical field [0001] The invention relates to a device for measuring the color density of a color printing machine. Background technique [0002] At present, most of the domestic densitometers are imported from abroad, and the interface of some densitometers does not match the software interface of the domestic color expander. [0003] In these densitometers, the light source usually uses yellow light (color temperature 5500K, 6500K) to irradiate the photo paper, and then collects the light intensities of three colors through color filters (red, green, blue). After this light source is used for a period of time, the accuracy is greatly reduced due to the influence of the lamp and color filter, and it cannot even be used. The other is to use LEDs as the light source. The luminous stability of the LED determines the accuracy of the measurement. However, the LED is not completely sealed. After the LED works through the current, there will be a problem of self-oxidation. ...
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IPC IPC(8): G03B27/73
Inventor 徐志铭吴楠
Owner 上海伟盟软件科技有限公司