Standard light source and relative radiation calibration method

Abstract

The present invention provides a standard light source and a relative radiation calibration method. The standard light source comprises a vacuum system and a radio frequency circuit; the vacuum system comprises a vacuum cavity, a vacuum pump and an inflation system; the inflation system performs inflation for the internal portion of the vacuum cavity, and the vacuum pump performs air exhaust of the vacuum cavity; the radio frequency circuit comprises a radio frequency power supply and a radio frequency electrode; one portion of the radio frequency electrode is located in the vacuum cavity; the radio frequency power supply is connected with the radio frequency electrode to supply power to the radio frequency electrode; and the gas in the vacuum cavity generates gas plasmas under the discharging of the radio frequency electrode to emit light. The radio frequency discharging is employed to generate plasmas and emit spectrums. The standard light source employs that the spectral line intensity ratio of the standard light source of the branching ratio principle is a fixed value, and cannot be changed with time so as to perform efficient work for a long time, and therefore, the standard light source does not need regular calibration to save the time and the process of the standard light source calibration so as to improve the utilization rate of the standard light source.

Description

technical field [0001] The invention relates to the technical field of light sources, in particular to a standard light source and a relative radiation calibration method using the standard light source. Background technique [0002] In radiometry, absolute radiometric calibration is the process of establishing a numerical relationship between radiation dose and detector output. In the actual use of a multi-channel spectrometer as a detector, in many cases, the relationship between the radiation amount and the absolute value of the detector output is not concerned, but only the responsivity of different pixels of the detector is considered. Correcting the difference in responsivity of different channels of a multi-channel spectrometer is relative radiometric calibration, which belongs to a kind of uniformity correction. After relative radiation calibration, if the number of photons (or power) incident on each channel is equal, the output value of each channel is also equal....

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Problems solved by technology

[0004] In view of this, the present invention provides a standard light source and a method for relative radiation calibration using the standard light source, in order to solve the problem that the standard light source in the prior art works unstable after being used for a certain period of time and needs to be re-calibrated, and the calibration process is comparatively Time-consuming, resulting in low usage of standard light sources

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