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Weak target ultraviolet magnitude calibration system

A calibration system and weak target technology, applied in the direction of photometry, measuring devices, instruments, etc., can solve the problems that the accuracy of star magnitude simulation cannot be directly calibrated, and it is difficult to meet the precise simulation of star magnitude level, so as to improve the detection and calibration capabilities Effect

Inactive Publication Date: 2012-03-28
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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Problems solved by technology

However, the magnitude simulation accuracy of this device cannot be directly calibrated so far, and can only be derived through inversion calculations. The magnitude simulation uncertainty is 25% at +16Mv, and about 45% at +23Mv, which is difficult to meet the requirements of star magnitude simulation. Therefore, it is necessary to develop a set of equipment that can be used for accurate calibration of star magnitude simulation accuracy

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Embodiment Construction

[0015] The problem of difficult calibration of the magnitude simulation accuracy of the weak-light magnitude simulator, combined with the principle of photon counting, the present invention proposes a weak target ultraviolet magnitude calibration system device, which can effectively simulate the magnitude of the star simulator in the laboratory Calibration is carried out, and the magnitude calibration range is +3Mv~+23Mv, and the calibration accuracy is better than 0.1 magnitude stars, which meets the requirements of the star simulator simulation accuracy of 0.2 magnitude stars. This weak target ultraviolet magnitude calibration system breaks through the previous magnitude calibration system. Filters, various attenuation sheets and detection lenses are installed in front of its PMT detector, which can greatly improve the dynamic range of its magnitude calibration. The calibration range of 7Mv~+13Mv is extended to +3Mv~+23Mv.

[0016] When the star simulator simulates the lumin...

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Abstract

The invention relates to an accuracy calibration system for weak target magnitude simulation by an ultraviolet star simulator in a space simulation test. The system comprises a star simulator optical system, a stray light eliminating light shield, a detection objective, an optical filter, and a photon counter, with the star simulator optical system, the stray light eliminating light shield, the detection objective, and the optical filter arranged on one optical path in order and the photon counter on an emergent optical path passing through the optical filter. The invention provides a weak target ultraviolet magnitude calibration system characterized by effective accuracy calibration to magnitude simulation of a star simulator in a laboratory, calibration ability for magnitude grade simulation in a large dynamic range, and high magnitude calibration accuracy.

Description

technical field [0001] The invention belongs to the field of optics, and relates to an optical calibration system, in particular to a system for calibrating the magnitude accuracy of an ultraviolet star simulator for simulating a weak target in a space simulation test. Background technique [0002] In deep space exploration and astronomical observation, the space cameras developed to detect various weak targets and observe the brightness changes of various celestial bodies need to carry out strict scientific calibration of their weak target detection capabilities before going to the sky to ensure that they have good working condition. The detection capabilities of this type of detection cameras are all above +8Mv, but the illuminance of +8Mv is very low. Due to the lack of accurate calibration equipment, it is difficult for the commonly used magnitude simulators to accurately simulate the irradiance of the actual magnitude luminescence, that is, Magnitude: Generally, the ma...

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Application Information

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IPC IPC(8): G01C25/00G01J1/00
Inventor 徐亮赵建科赛建刚周艳胡丹丹刘峰
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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