System for realizing integrated observation of sun and sky radiation and self-calibration method

Abstract

The invention relates to the technical field of atmospheric optics, and in particular relates to a system for realizing integrated observation of sun and sky radiation and a self-calibration method. The system comprises a supporting frame, an entrance pupil diaphragm is arranged on the supporting frame, a first window lens is arranged on the entrance pupil diaphragm, an attenuation piece is fixed to the center of the side face, close to a detector, of the first window lens, and the attenuation piece and the first window lens form an annular entrance pupil. Compared with the traditional method that two sets of receiving optical systems / two sets of measuring equipment are used for observing the sun to measure the atmospheric transmittance, the water vapor column content and the sky background radiance, the system provided by the invention has the advantages that the detection of two signals with different intensities is realized by adopting an annular entrance pupil and utilizing a spatial light splitting method, so that a rotary filter wheel is not needed; the whole system is simpler in structure, and the measurement of the sky background brightness can be calibrated in real time; the size and the weight of the system are reduced, and the operability of equipment can be remarkably improved.

Description

technical field [0001] The invention relates to the technical field of atmospheric optics, in particular to a system and a self-calibration method for realizing integrated observation of solar and sky radiation. Background technique [0002] At present, when observing the sun or the sky background, the circular entrance pupil is used, and the direct measurement of the sun's direct light or the sky's radiant light is completed in a receiving optical system. The equipment that completes the measurement of direct sunlight is generally called a sun photometer, and the equipment that completes the measurement of the sky background is generally called a sky luminance meter. There are also reports that the sun photometer also takes into account the function of measuring the sky background radiation. The sun photometer observes the sun intensity to measure the transmittance of the entire atmosphere and the water vapor column content, and the sky brightness meter observes the radiati...

AI Technical Summary

Problems solved by technology

[0006] To sum up, there is no report on using only one receiving optical system to achieve spectral observation of direct sunlight / sky background radiation without relying on the rotating filter wheel

Images