Method for calibrating standard whiteboard by using light source
A calibration standard and light source technology, applied in spectrometry/spectrophotometry/monochromator, optical radiation measurement, color/spectral characteristic measurement, etc., can solve problems such as spectral reflection error and poor consistency, and achieve stability Effect of Repeatability Guarantee
Pending Publication Date: 2022-01-28
OCEANOGRAPHIC INSTR RES INST SHANDONG ACAD OF SCI
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Problems solved by technology
The existing standard whiteboard itself has spectral reflectance errors and poor consistency
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[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0038] In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. connected, or integrally connected. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations. In the...
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Abstract
The invention discloses a method for calibrating a standard whiteboard by using a light source. The method comprises the following steps of S1, collecting a spectrum of the light source, and recording the spectrum as a first spectrum; S2, collecting a spectrum of a standard white board to be calibrated, recording the spectrum as a second spectrum, and determining a stable interval in the second spectrum; S3, calculating a calibration coefficient k by using the spectral value of the stable interval; S4, calculating a spectrum value K of the calibration spectrum of the standard white board, wherein the calculation formula of the calibration coefficient k is k = b / a; b is the spectral value of the stable interval of the second spectrum, and a is the spectral value of the stable interval of the first spectrum. According to the invention, the standard white board is not interfered by poor reflectivity of the existing standard white board, inconsistent standards provided by different standard white boards and the like in the use process, is kept stable in the full-wavelength wave band, and the method has practical significance in the aspect of analyzing indexes such as diffuse reflection spectrum and the like.
Description
technical field [0001] The invention relates to the technical field of standard measuring instruments, in particular to a method for calibrating a standard whiteboard by using a light source. Background technique [0002] The standard whiteboard is a chromaticity standard measuring instrument, which is traced from the national chromaticity benchmark to an ideal total reflection diffuser, and is assigned the absolute spectral reflectance. According to the use requirements and technical conditions, standard whiteboards can be divided into the following three categories: transfer standard whiteboards, work standard whiteboards and reference standard whiteboards. Among them, the transfer standard whiteboard is used to "transfer" the reflectance value, such as the transfer of the value from the upper-level metrology department to the lower-level metrology department, from a higher-level instrument to a lower-level instrument, or a comparison between instruments of the same level....
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IPC IPC(8): G01N21/25G01J3/52
CPCG01N21/25G01J3/524
Inventor 范萍萍李雪莹邱慧敏侯广利
Owner OCEANOGRAPHIC INSTR RES INST SHANDONG ACAD OF SCI