Spectrum irradiance standard light source for ultraviolet optical instrument radiometric calibration

Abstract

The invention provides a spectrum irradiance standard light source which is used for radiometric calibrations of ultraviolet optical instruments, which comprises a light source component, a lifting holdfast, a collimating component and a lamp chamber, wherein a window which is used for output xenon lamp radiations is opened on the front end of the lamp chamber, an xenon lamp power supply is connected with an xenon lamp electrically, a port of a cylinder lens hood is communicated with the window which is on the lamp chamber and installed concentrically, a piece of lens and a diaphragm are arranged in turn on an xenon lamp radiation light path inside the lens hood, the xenon lamp is located on the focus of the lens, the diaphragm is located on the other side of the lens, the collimating component and the lamp chamber are installed commonly on the lifting holdfast. An extra-quiet xenon lamp which is selected by the invention has a short arc xenon lamp which has a comparatively strong radiation strength in an ultraviolet wave band, the invention also adopts a highly durable cathode which enables arc points of the xenon lamp with no drifts and fluctuations, the light source can be usedfor ultraviolet wave band 200-2000nm, visible wave band and near infrared wave band, and in particular for the ultraviolet wave band with a wave length less than 400nm, and the signal-to-noise ratio of calibrations can be increased effectively due to high irradiances.

Description

technical field [0001] The invention relates to a ground radiation calibration instrument for an earth observation remote sensing instrument, in particular to a spectral irradiance standard light source for radiation calibration of an ultraviolet optical instrument. Background technique [0002] In optical remote sensing, in order to accurately obtain the physical parameter information of the measured object, radiometric calibration of the instrument is an important aspect of optical remote sensing. Especially for on-board optical remote sensing instruments, in order to ensure the long-term stability and measurement accuracy of the instruments, the on-board optical remote sensing instruments are usually required to measure the solar irradiance to monitor the long-term changes of the instruments in the space environment. For this reason, in the development process of on-board optical remote sensing instruments, radiometric calibration of the instruments is an important aspect...

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