Grating-based rainbow hologram chromaticity detection and evaluation method

A technology of rainbow holography and evaluation method, which is applied in the directions of optical radiation measurement, color measurement device, radiation pyrometry, etc. It can solve the problems of large repeated color detection error and poor color detection stability, so as to promote healthy development and be easy to popularize and apply , the effect of high sensitivity

Inactive Publication Date: 2010-12-15
永发印务(东莞)有限公司
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Problems solved by technology

Although this method realizes the evaluation of the surface color of laser paper to a certain extent, it fails to explain the regularity of the color of laser paper fundamentally, and the error

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  • Grating-based rainbow hologram chromaticity detection and evaluation method
  • Grating-based rainbow hologram chromaticity detection and evaluation method
  • Grating-based rainbow hologram chromaticity detection and evaluation method

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Embodiment Construction

[0035] The present invention is further described below in conjunction with the drawings and embodiments, but it is not used to limit the scope of the present invention.

[0036] Diffraction grating-based samples include standard samples and measurement samples. The labeled samples are the reference standard for the quality of the factory and the measurement samples are products in production. Example Take respectively 5 samples of 100mm×100mm92g gold beam laser base paper (measurement sample) and 100mm×100mm 92g gold beam laser base paper printing products (standard samples), and perform the following analysis:

[0037] Step 1. Using an electron microscope scanner, the measurement sample surface is enlarged to determine the grating base surface grating structure type and arrangement mode, and the grating parameters are determined accordingly. Example After cutting the sample to a suitable size, magnify it to 3000 times with an electron microscope to obtain the structure diagram of...

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Abstract

The invention provides a grating-based rainbow hologram chromaticity detection and evaluation method, which mainly comprises the following steps of: determining the type and optical parameters of a diffraction grating, and selecting an optical filter according to the type characteristics of the grating; preserving or shielding specular reflection light according to actual needs by adopting a diffused light source; and testing the reflectance spectrums of a sample, calculating spectral errors and metamerism indexes of a reference and the sample according to the reflectance spectrums of the tested sample, and evaluating the chromaticity information of a grating-based rainbow hologram image according to the spectral errors and the metamerism indexes. The method has the advantages of objectively reflecting the chromaticity information between the sample and the reference and accurately reflecting chromaticity errors between the sample and the reference, along with simplicity and high speed, and is popularized and utilized to effectively control the chromaticity quality of the grating-based rainbow hologram image and promote laser holographic anti-counterfeiting, three-dimensional printing and control over the quality of grating-based high-end products.

Description

Technical field [0001] The invention belongs to the field of image chromaticity quality detection and evaluation, and specifically relates to a grating-based rainbow hologram that uses special light source illumination conditions and calculates the chromaticity information of a grating-based image through spectrum, thereby evaluating the quality of the grating-based image Image chromaticity detection and evaluation method. Background technique [0002] In the increasingly competitive consumer goods market, when consumers buy goods, in addition to paying attention to the quality and performance of the goods, they also have higher and higher requirements for the packaging and decoration of the goods. The raster-based rainbow holographic printing material has a clear and bright effect after printing, as well as the overall anti-counterfeiting function of the rainbow image that cannot be covered after printing, which makes the packaged product appear noble and gorgeous, thereby impro...

Claims

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Application Information

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IPC IPC(8): G01J3/46G01J3/51G01J3/10
Inventor 万晓霞刘振黄新国
Owner 永发印务(东莞)有限公司
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