Color measurement color difference instrument and color measurement method thereof

Abstract

The invention provides a color difference meter for color measurement and a color measuring method thereof and belongs to the technical field of color measurement. A LED light source is connected with a light path of a collimation lens through an arranged ground glass and an aperture, the back part of the collimation lens is provided with a spectroscope, wherein, the reflected light is connected with the light path of a reference light sensor after reflected by the reflector; the transmission light is connected with the light path of an integrating sphere; the reference light sensor and a measurement light sensor connected with and arranged on the integrating sphere are respectively connected with an embedding processor in a transmission way; the integrating sphere is provided with a sample pool corresponding to the position of the transmission light. The invention adopts the light source consisting of a blue chip, a purple chip and flurescent powder, the reference light sensor is adopted to monitor light source fluctuation and eliminates non-stability of the light intensity of the LED light source as well as reduces the error due to the light source fluctuation. The reference light sensor and the measurement light sensor transforms the optical signal into the electric signal and then the electric signal is sent into the embedding processor after processing, at last, color measurement or color difference measurement can be achieved after the procession of the embedding processor. The invention has simple structure, low power consumption and good repetitiveness of the detected result.

Description

technical field [0001] The invention belongs to the technical field of color measurement, and in particular relates to a color difference instrument and a color measurement method using purple and blue LED chips as light sources. Background technique [0002] At present, the color measurement methods adopted by the colorimeter mainly include spectrophotometry and photoelectric integration. Spectrophotometry calculates the tristimulus value of the color by measuring the spectral power distribution of the light source or the spectral distribution of the reflected light of the object. The accuracy is high, but the implementation is complicated and the cost is high. The photoelectric integration method does not measure the spectral power distribution of a certain wavelength, but measures the tristimulus value of the sample by integrating in the entire measurement wavelength range, so as to realize the color value of the color source and the color difference measurement of differ...

AI Technical Summary

Problems solved by technology

However, at present, the light source of photoelectric integration colorimeter mostly adopts halogen tungsten lamp, which consumes a lot of energy and emits a lot of heat. Some colorimeters using LED as light source cannot cover all visible light regions, and the frequency response is not good. Unstable light source, imprecise test results

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