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Correlated photon self-calibration solar irradiance spectroradiometer of 266-nanometer pumping

A technology related to photon and solar spectrum, which is applied in the fields of climate change, optical remote sensing, and environmental monitoring. It can solve the problem of lack of payload in the continuous observation system of the sun in sub-spectral segments, and achieve high calibration accuracy.

Active Publication Date: 2020-01-31
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI +1
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Problems solved by technology

The solar reflection band includes the atmospheric transmission window, seawater transmission and plant photosynthesis bands. Carrying out continuous observation of the sun in sub-spectral bands is of special importance to the research of global climate change, radiation balance, and global primary productivity. Lack of payload for the continuous observation system of the sun in sub-spectral bands

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  • Correlated photon self-calibration solar irradiance spectroradiometer of 266-nanometer pumping
  • Correlated photon self-calibration solar irradiance spectroradiometer of 266-nanometer pumping

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Embodiment Construction

[0016] Such as figure 1 , 2As shown, a 266nm pumped correlative photon self-calibration solar spectral irradiance meter includes correlative photon generation optical path, solar observation optical path, shared optical path, photon counting and analog detection module, coincidence detection and signal processing module, said The relevant photon generation optical path includes a 266nm pump laser 1, a 266nm narrow-band interference filter 2, a Glan Taylor prism 3, a 1 / 2 wave plate 4, a converging lens 5 and a BBO crystal 6 arranged in sequence on the optical path, according to I The second-order nonlinear effect of similar negative uniaxial crystals and the phase-matching condition of crystal birefringence generate phase-matched related photons in the 365nm and 976nm bands. The presence of another photon; the shared optical path includes a motor-rotating off-axis parabolic reflector 7, a figure-eight-shaped stray light elimination module 10, a dichroic mirror 11, a cut-off fi...

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Abstract

The invention discloses a correlated photon self-calibration solar irradiance spectroradiometer of 266-nanometer pumping. Under a self-calibration mode, absolute spectrum photon rate of a correlated photon light source is acquired by internally arranging a new correlated photon self-calibration radiation calibration light source and integrally designing a self-calibration optical path and a solarobservation optical path, and the absolute spectrum power response calibration of a solar observation optical path simulation detector is achieved; and under a solar observation mode, solar absolute spectral irradiance within a wave band range being 365-976 nanometers is measured, and a solar observation channel observation result is corrected according to a calibration coefficient acquired in theself-calibration mode. High-accuracy observation of solar spectrum irradiance from visual light to near-infrared band is achieved by transferring two different radiation-order dynamic ranges from anangle of a basic principle of calibrating quantum efficiency of a single-photon detector by a correlated photon method, and the scientific problem of traceability of a solar observer in a space platform is solved.

Description

technical field [0001] The invention relates to the technical fields of climate change, environmental monitoring and optical remote sensing, in particular to a 266nm pumped correlated photon self-calibrating solar spectrum irradiance meter. Background technique [0002] Long-term, stable and multi-task satellite observations are the main source of scientific data to reveal the direction and extent of global climate and environmental evolution. The research results of space remote sensing and numerical models in the past 30 years show that the absolute radiation measurement of the solar reflection spectrum reaches and maintains an uncertainty of 0.05% - 1%, which is the basic requirement for confirming the long-term period and trend of climate parameters. Facing the technical challenge of ultra-high-precision radiation measurement, the internationally recognized technical approach is to establish a space platform radiation reference, and realize the unified traceability of bu...

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Application Information

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IPC IPC(8): G01J3/28G01J3/02
CPCG01J3/0205G01J3/28Y02A90/10
Inventor 李健军高连芬翟文超夏茂鹏袁银麟胡友勃丁蕾戚涛郑小兵
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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